Okay, I am just too excited to be patient and wait to see it pop up on the Projects page... how close are we?
I finally acquired (I hope) enough MN3005s, so I just had to post and ask.
Where we at B?
Yes please
From another recent thread:
Quote from: madbean on August 25, 2014, 07:14:13 PM
These are the projects I am trying to finish Oct-Dec:
Attack Decay
Polyphase
Frequency Analyzer
One sub-mini amp
One sub-mini OD
Dig Dig2
Mandroid (crazy little thing it is)
Rabbit Punch (ABY)
Man O War (analog delay)
Peacekeeper
Bombtrack (OC-2)
Cave Troll (tap tempo delay)
Quadrovibe 2
A big list, but every single one is already in the process of prototyping and debugging. Four per month should be doable.
No! Never admit that! ;-)
These days, I spend more time building/planning to build than I do playing guitar... that's the damn shame that I need to correct.
looking forward to the mini tube projects, and the Dig Dug, and... well damn a lot of them.
We are getting pretty close. Even my BBDs are hopping with excitement.
:o
That's a biggun. I'm going to have have my handlers hold all my calls and clear my schedule.
Holy crap that one looks crazy!
I see aweseomeness coming down our road. You better stock up big time on this one Brian! As we say in Austria: "this one will sell like warm buns."
Can't wait for this one, although 7 trimmers!! already give me the shivers to adjust
OMG IT DOES EXIST!!!
In all seriousness, I really hope it gets released before the end of the month, I've had a stash of 3008's sitting in a drawer for like 2 months now waiting for this beast!
My goodness.
By the power of grey skull!
That looks intense.
Cody
Richard
Killer!
Will 3005's work in there? - and, will i need 4 of them?
I'm ready.
I was born ready.
Quote from: mean_dorris on September 23, 2014, 03:00:00 AM
Killer!
Will 3005's work in there? - and, will i need 4 of them?
I pretty sure 3005's will work. The board is designed to take 4 bbd chips and there is discussion of mixing chips. so 1x MN3005 and 3x MN3008. I thought I read that in a post awhile ago. and here it is: http://www.madbeanpedals.com/forum/index.php?topic=16233.0
Ok so i just re read it and Brian said he would be testing the mixed chip idea so not verified yet.
Richard
Any recommendations for buying MN3008s? I saw them on small bear, but $80 for 4 chips is pretty pricey. I wanted to go ahead and buy them in advance
Sent from my iPhone using Tapatalk
I think people have had good luck ordering from here:
http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291175702355?pt=LH_DefaultDomain_0&hash=item43cb6c9f53
Some confirmation on this would be appreciated (I kinda want someone to confirm before I buy from him too)
Quote from: mean_dorris on September 23, 2014, 03:00:00 AM
Killer!
Will 3005's work in there? - and, will i need 4 of them?
Whaaa :o
If you are thinking about using $200 worth of BBD then you must REALLY... REALLY love the DIY experience ;)
Quote from: knauerj on September 23, 2014, 12:21:49 PM
Any recommendations for buying MN3008s? I saw them on small bear, but $80 for 4 chips is pretty pricey. I wanted to go ahead and buy them in advance
Sent from my iPhone using Tapatalk
I just ordered 4 last week from Paul.
http://www.diyguitarpedals.com.au/shop/index.php?main_page=product_info&cPath=4&products_id=123
11$ a piece, each verified. He's fast as well! Just 7 left.. get them while they're still warm.
Don't forget there will be an option to build it with the BL3208. And, it is possible to covert that to an MN3008 build at a later time (with some desoldering and component replacement).
Quote from: madbean on September 23, 2014, 02:06:30 PM
Don't forget there will be an option to build it with the BL3208. And, it is possible to covert that to an MN3008 build at a later time (with some desoldering and component replacement).
Hmmmm....maybe that's the route I will take. Any noticeable tone difference between the two? The BL3208s are definitely more affordable
Sent from my iPhone using Tapatalk
Yes, there will be some difference. The MN3008 version will have a bit more headroom. I can't say more yet, but I will provide a detailed description of the differences once I have completed the BL3208 build.
Indeed, I do. :)
I ask because I bought 2 x MN3005 last year with the intent on building a dirtbag. I'm not sure what approach to take with regards mixing and matching, possibly leaving BBDs empty, or just coughing up another 100 for 2 addtional 3005s. Last year's investment has already been absorbed anyhow.
Quote from: Govmnt_Lacky on September 23, 2014, 01:32:16 PM
Quote from: mean_dorris on September 23, 2014, 03:00:00 AM
Killer!
Will 3005's work in there? - and, will i need 4 of them?
Whaaa :o
If you are thinking about using $200 worth of BBD then you must REALLY... REALLY love the DIY experience ;)
Quote from: dan.schumaker on September 23, 2014, 01:15:07 PM
I think people have had good luck ordering from here:
http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291175702355?pt=LH_DefaultDomain_0&hash=item43cb6c9f53
Some confirmation on this would be appreciated (I kinda want someone to confirm before I buy from him too)
+1. I've asked for some confirmation on this seller in a few different threads myself.
Lots of awesome right here!
Looks like it will be a 1790NS built, love that..... this circuit and Pete/Keefe PolyChorus would make a nice pedal pair on any board! 8)
Quote from: lincolnic on September 24, 2014, 03:58:27 AM
Quote from: dan.schumaker on September 23, 2014, 01:15:07 PM
I think people have had good luck ordering from here:
http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291175702355?pt=LH_DefaultDomain_0&hash=item43cb6c9f53
Some confirmation on this would be appreciated (I kinda want someone to confirm before I buy from him too)
+1. I've asked for some confirmation on this seller in a few different threads myself.
People reported poor packaging but they seemed to get that fixed by the time I bought a pair. They were packaged well and they were legit (I dropped them in my aquaboy build and they worked as expected). It appears the seller has a bunch of NOS chips all with the same number printed on them. I have another pair on the way so I will report back if there happen to be issues.
Quote from: Stomptown on September 24, 2014, 05:14:21 AM
People reported poor packaging but they seemed to get that fixed by the time I bought a pair. They were packaged well and they were legit (I dropped them in my aquaboy build and they worked as expected). It appears the seller has a bunch of NOS chips all with the same number printed on them. I have another pair on the way so I will report back if there happen to be issues.
Thanks Jon! Let us know how your other pair turns out. I don't currently have any delay builds to test stuff in, so hopefully the seller will still have stock by the time the new Dirtbag drops. (I have some known good 3008s already, but I want to build two of these guys.)
I think as soon as we get the good-to-go on them, there is going to be a run on them
I bought two separate pairs from that seller as well. Good chips, bad packaging.
Buy with some reasonable level of semi-confidence. ;D
Quote from: dan.schumaker on September 24, 2014, 07:22:49 PM
I think as soon as we get the good-to-go on them, there is going to be a run on them
Yep. We should all just bite the bullet and sink or swim together.
Sent from my iPhone using Tapatalk
Quote from: m-Kresol on September 23, 2014, 01:55:01 PM
Quote from: knauerj on September 23, 2014, 12:21:49 PM
Any recommendations for buying MN3008s? I saw them on small bear, but $80 for 4 chips is pretty pricey. I wanted to go ahead and buy them in advance
Sent from my iPhone using Tapatalk
I just ordered 4 last week from Paul.
http://www.diyguitarpedals.com.au/shop/index.php?main_page=product_info&cPath=4&products_id=123
11$ a piece, each verified. He's fast as well! Just 7 left.. get them while they're still warm.
Looks like they are all out. If you are reading this Paul, are you planning on restocking?
Hey man, I have just reordered another lot of mn's today! Usually takes about 2-3 weeks to receive and test, ill try and remember to update this thread when they are available again!
Paul
Quote from: dan.schumaker on September 23, 2014, 01:15:07 PM
I think people have had good luck ordering from here:
http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291175702355?pt=LH_DefaultDomain_0&hash=item43cb6c9f53
Some confirmation on this would be appreciated (I kinda want someone to confirm before I buy from him too)
I ve bought a couple of pairs from this seller and waiting to get them on my hands and test them.
The only reason I bought from him is why Paul's BBD were out of stock.
I believe the safest way to go is to buy them from Paul's e-store. Legit and fast shipping.
Since there is a new BBD project here I believe Paul will stock some more chips.
Cheers,
Panos.
I'm all in with everyone else. I just got my pair. The listing said 15 sold in the last 24 hours, so I think we are all in this together :)
And now they're sold out! Guess I'll be looking elsewhere.
I got my pair if mn3098s and they work as expected and were packaged decent. They were Mitsubishi instead of Panasonic which was unexpected. Looks like they are sold out but hopefully this helps anyone who grabbed them before they ran out.
That's so good to see. I snagged a set from this seller and just got em in the mail today! Can't wait!
Hi
From my understanding the only thing that would prevent 4 x MN3005 would be a clocking issue
Any time I have messed with this concept it has worked however. Example 1 was on Aqua Puss builds (MN3101 clock) and in that case you are only driving 1 chip (or 2 with a daughter board) and that worked. Alternatively, Ive used 2 x double MN3008 boards on a Dirtbag v2 and that worked too, but the delay time wasnt as long - not sure if thats just the chips, the way I tuned the trimmers, or something else. In any case, it worked.
Quote from: LaceSensor on September 30, 2014, 09:32:06 AM
Hi
From my understanding the only thing that would prevent 4 x MN3005 would be a clocking issue
But I spy a spot for a 4049 buffer on Beans prototype, which should allow that :)
There's no reason 4 x MN3008 should give a shorter delay than 2 x 3005 as long as the clock cap value is correct.
Quote from: Scruffie on September 30, 2014, 09:57:36 AM
Quote from: LaceSensor on September 30, 2014, 09:32:06 AM
Hi
From my understanding the only thing that would prevent 4 x MN3005 would be a clocking issue
But I spy a spot for a 4049 buffer on Beans prototype, which should allow that :)
There's no reason 4 x MN3008 should give a shorter delay than 2 x 3005 as long as the clock cap value is correct.
cool
wrt the time, I imagine it was just poorly calibrated or my imagination, or both.
FWIW, the real DMM I just fixed up with your help has a heap of delay time; its 4 x MN3008
Im my dirtbag I ended up subbing a 330pF for the clock cap (which, IIRC, was meant to be 240pF) it gets really noisy at the long times, but sounds cool. Thats 2 x MN3005.
Quote from: Scruffie on September 30, 2014, 09:57:36 AM
Quote from: LaceSensor on September 30, 2014, 09:32:06 AM
Hi
From my understanding the only thing that would prevent 4 x MN3005 would be a clocking issue
But I spy a spot for a 4049 buffer on Beans prototype, which should allow that :)
There's no reason 4 x MN3008 should give a shorter delay than 2 x 3005 as long as the clock cap value is correct.
That sounds like good news! I certainly don't mind paying the extra for another 2 x MN3005 if it means my delay will be that much more kickass; but I gotta know that it's going to work, first! Maybe some kind of confirmation from .. er.. the build docs or something.. ? ;)
I think I have a reliable source for them, but I'd like to be able to pull the trigger on it before said source dries up entirely.
IMO, the DM-2 et al just don't have the same magic.
So 4x3005 gets 1100ms.... Just need tap tempo now :)
Here is the status update:
4xMN3008 tested and confirmed. Sounds great. I did do a couple of mods to mess with the companding to improve the attack/release response.
4xBL3208 tested but not confirmed. Having an issue with distortion coming out of the output of the third BBD. Not sure of the problem yet. Everything else about it seems to sound good...running it at 12v with 10v on the BBDs for a little extra headroom.
MN3008/MN3005 mix not yet tested.
I'll be finishing it up this week I think. Lastly, I will compare the builds to my 4xSAD1024 vintage unit and the modern Memory Boy to get some benchmarks.
Quote from: madbean on September 30, 2014, 02:38:20 PM
Here is the status update:
4xMN3008 tested and confirmed. Sounds great. I did do a couple of mods to mess with the companding to improve the attack/release response.
4xBL3208 tested but not confirmed. Having an issue with distortion coming out of the output of the third BBD. Not sure of the problem yet. Everything else about it seems to sound good...running it at 12v with 10v on the BBDs for a little extra headroom.
MN3008/MN3005 mix not yet tested.
I'll be finishing it up this week I think. Lastly, I will compare the builds to my 4xSAD1024 vintage unit and the modern Memory Boy to get some benchmarks.
When you run at 12V with 10V on the BBDs, what voltage do you have the clock at? It should be the same voltage as the BBDs. Also, regards the clock buffer, how do you have the inverters set up? In this case I would think all 3 in parallel would be the better choice over the standard flanger 1 in to 2.
Quote from: aballen on September 30, 2014, 01:39:36 PM
So 4x3005 gets 1100ms.... Just need tap tempo now :)
I got this on standby :D
http://www.smallbearelec.com/servlet/Detail?no=1334 (http://www.smallbearelec.com/servlet/Detail?no=1334)
And is there any reason to test MN3005 (or rather, are you planning on it?)
Quote from: Scruffie on September 30, 2014, 02:42:30 PM
When you run at 12V with 10V on the BBDs, what voltage do you have the clock at? It should be the same voltage as the BBDs. Also, regards the clock buffer, how do you have the inverters set up? In this case I would think all 3 in parallel would be the better choice over the standard flanger 1 in to 2.
The BBD and clock are on separate but identical power rails (10v). So, they are isolated from the audio power and from each other. I considered doing a separate regulator for the two but the routing is proving to be a bit too much for it. I may even try a 15v audio and 10v BBD (like the Echoczar) for giggles. The inverters are set up like the flanger type, but I can always try it the other wire with the breadboard.
Quote from: mean_dorris on September 30, 2014, 05:24:07 PM
Quote from: aballen on September 30, 2014, 01:39:36 PM
So 4x3005 gets 1100ms.... Just need tap tempo now :)
I got this on standby :D
http://www.smallbearelec.com/servlet/Detail?no=1334 (http://www.smallbearelec.com/servlet/Detail?no=1334)
Interesting....is that going to work with this new version?
I actually have a separate delay design based around the MV-64. I considered it for the Dirt bag but decided against it because of the already high part count.
Quote from: madbean on September 30, 2014, 06:43:17 PM
Quote from: Scruffie on September 30, 2014, 02:42:30 PM
When you run at 12V with 10V on the BBDs, what voltage do you have the clock at? It should be the same voltage as the BBDs. Also, regards the clock buffer, how do you have the inverters set up? In this case I would think all 3 in parallel would be the better choice over the standard flanger 1 in to 2.
The BBD and clock are on separate but identical power rails (10v). So, they are isolated from the audio power and from each other. I considered doing a separate regulator for the two but the routing is proving to be a bit too much for it. I may even try a 15v audio and 10v BBD (like the Echoczar) for giggles. The inverters are set up like the flanger type, but I can always try it the other wire with the breadboard.
Hmm, well I don't know exactly what you're doing so this may be moot but power filtering wise, you may find that it's better to run the clock/lfo directly off the regulator and then use r/c filters for everything else to separate them. Anyway, only mentioned the clock/bbd voltage cause of your distortion but seems that it's not the issue :)
The only reason I mention the inverters is when it came to that 1 in to 2 set up, reason was that 3 in parallel over buffered basically but as that was for a single MN3007 being clocked to extremes and here we're going for maximum load with the 4 x 3005, might work better.
They're back: http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291255711068?
Snagged a couple. Might build with them. Might hold on as trade bait! Who know?? This is exciting!! 8)
Thanks for the heads up! Jumped on a couple pairs myself.
I just grabbed two pair myself, anyone else find it suspect that the two in the pic are stamped identically?
Quote from: Scruffie on October 01, 2014, 05:39:25 AM
Hmm, well I don't know exactly what you're doing so this may be moot but power filtering wise, you may find that it's better to run the clock/lfo directly off the regulator and then use r/c filters for everything else to separate them. Anyway, only mentioned the clock/bbd voltage cause of your distortion but seems that it's not the issue :)
The only reason I mention the inverters is when it came to that 1 in to 2 set up, reason was that 3 in parallel over buffered basically but as that was for a single MN3007 being clocked to extremes and here we're going for maximum load with the 4 x 3005, might work better.
Thanks for the insight, Scruffie. The way the proto was designed I have a master regulator for audio and LFO. The clock and BBD are two separate R/C filtered supplies derived from the regulator. It was only after I thought about trying the BL3208 12v or 15v on audio and 10v on BBD. So, on that one I have two 5.1v Zeners in series on each 10v supply line to the clock and bbd. It seems very stable voltage wise, but it's worth considering two separate regulators perhaps. I mean, you could run the DMM on 18v audio / 15v BBD, too AFAIK. Never tried it.
The distortion issue may just be the chip itself. I'll know more tomorrow when I work on this again.
Quote from: madbean on October 01, 2014, 09:08:58 PM
Quote from: Scruffie on October 01, 2014, 05:39:25 AM
Hmm, well I don't know exactly what you're doing so this may be moot but power filtering wise, you may find that it's better to run the clock/lfo directly off the regulator and then use r/c filters for everything else to separate them. Anyway, only mentioned the clock/bbd voltage cause of your distortion but seems that it's not the issue :)
The only reason I mention the inverters is when it came to that 1 in to 2 set up, reason was that 3 in parallel over buffered basically but as that was for a single MN3007 being clocked to extremes and here we're going for maximum load with the 4 x 3005, might work better.
Thanks for the insight, Scruffie. The way the proto was designed I have a master regulator for audio and LFO. The clock and BBD are two separate R/C filtered supplies derived from the regulator. It was only after I thought about trying the BL3208 12v or 15v on audio and 10v on BBD. So, on that one I have two 5.1v Zeners in series on each 10v supply line to the clock and bbd. It seems very stable voltage wise, but it's worth considering two separate regulators perhaps. I mean, you could run the DMM on 18v audio / 15v BBD, too AFAIK. Never tried it.
The distortion issue may just be the chip itself. I'll know more tomorrow when I work on this again.
The LFO and Clock should share the same voltage really, if you run the LFO at 15V and the clock at 10V you wont get the same modulation range seeing as the LFO is modulating the clock and it's going to be swinging between a higher voltage.
Hmm... just a small idea but rather than 2 x 5v1 zeners, wouldn't an LED do the job for dropping the voltage down to 10V from the 12V supply? I've given in trusting zeners for anything but very minor current jobs.
I mean 2 regulators would be ideal but not necessarily a requirement. I personally try and avoid r/c filters on clocks due to the high current demands of them, can lead to unexpected behavior, not so bad if the main supply is steady but if using a charge pump.
I guess you could run the DMM on 18/15V I can't see it offering much benefit though, the DMM is already pretty decent audio wise as far as headroom goes and when the BBDs have only 1V P-P or whatever it is.
Hang on a minute, have you given the make up gain stages between BBDs a fixed V.Ref and the BBD an independent bias trimmer? If not when you're setting the bias for your 3rd BBD which is at 12V so wants to see 6V bias and the BBD which is at 10V so wants to see around 5V one or the other isn't going to be biased correctly.
Quote from: kothoma on October 01, 2014, 06:01:31 PM
They're back: http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291255711068?
Crap....looks like the listing ended. I shouldn't have dragged my feet.
I got my four MN3008s today from our popular eBay seller, but they weren't packaged with any ESD protection. Since the Dirtbag 3 still has yet to be released, I don't have any circuits to test them in. Is there any other way I can check to see if they're working/real?
They also all have the same production code stamped on them, which seems a little suspect. Anyone else who ordered chips from the relisting, how did your chips turn out?
Quote from: lincolnic on October 06, 2014, 05:56:29 PM
I got my four MN3008s today from our popular eBay seller, but they weren't packaged with any ESD protection. Since the Dirtbag 3 still has yet to be released, I don't have any circuits to test them in. Is there any other way I can check to see if they're working/real?
Take any MN3007 based chorus and build a little adapter.
Quote
They also all have the same production code stamped on them, which seems a little suspect. Anyone else who ordered chips from the relisting, how did your chips turn out?
Wouldn't this be normal if they're from the same batch?
Any BBDs I have gotten my hands on have been recycled. The only matching ones I have are fake MN3005.
Quote from: lincolnic on October 06, 2014, 05:56:29 PM
I got my four MN3008s today from our popular eBay seller, but they weren't packaged with any ESD protection. Since the Dirtbag 3 still has yet to be released, I don't have any circuits to test them in. Is there any other way I can check to see if they're working/real?
They also all have the same production code stamped on them, which seems a little suspect. Anyone else who ordered chips from the relisting, how did your chips turn out?
I bought 2 weeks ago. All were Mitsubishi and had the same production code (they were the shiny black plastic ones). I also ordered 2 chips a few months ago and both of those were panasonic and had matching codes. All 6 are real and work as expected in my Aquaboy. The only difference is they packaged all of mine in ESD tubes. I'm not sure why they are not consistently doing this. It's really the main downfall. If you need someone to verify them for you I'd be willing to help out...
Just got mine....
All inside an ESD tube however, the ends of the tube were taped with scotch tape AND the whole tube was taped to a piece of cardboard. ::)
Needless to say, I am not excited about ripping the tape away from the cardboard and tube to generate that good 'ole static electricity :o
All pieces are stamped with a number 9, then a "D" with a line over it, then... a bit further away... a number 6. Plastic casing with shiny smooth outline and the leads look clean.
Don't currently have a circuit to test them in so I look forward to either rejoicing -OR- cussing in the not-too distant future :P
Ugh, yeah, I've bought a lot of BBDs in the past year, and a vast majority of them were packaged just as you mentioned, in a tube with tape on both ends.
Quote from: Govmnt_Lacky on October 06, 2014, 09:10:38 PM
Just got mine....
All inside an ESD tube however, the ends of the tube were taped with scotch tape AND the whole tube was taped to a piece of cardboard. ::)
Needless to say, I am not excited about ripping the tape away from the cardboard and tube to generate that good 'ole static electricity :o
All pieces are stamped with a number 9, then a "D" with a line over it, then... a bit further away... a number 6. Plastic casing with shiny smooth outline and the leads look clean.
Don't currently have a circuit to test them in so I look forward to either rejoicing -OR- cussing in the not-too distant future :P
Yep, that's the same package I got. I guess we'll sink or swim together!
Quote from: Stomptown on October 06, 2014, 07:09:37 PM
If you need someone to verify them for you I'd be willing to help out...
Thanks Jon, but it seems a little excessive to ship them across the country and back just for that (I'm in Brooklyn). Maybe I'll see if someone has an appropriate build to verify locally...
Quote from: agoldoor on October 06, 2014, 10:25:25 PM
Ugh, yeah, I've bought a lot of BBDs in the past year, and a vast majority of them were packaged just as you mentioned, in a tube with tape on both ends.
This! I've bought 6 MN3005s and 8 MN3008s in the past 2 years and excerpt for a pair of each purchased here on the forum all gave had taped ends. Luckily they all worked!
I already have a problem, the auction was 2 peices for $12:50, ordered 2 for $25.00 meaning 4 pieces, and guess what, I got two in the mail, not 4. sigh.
They do look NOS though rather than pulled from something, so maybe no need to worry about the dates... will see.
Quote from: aballen on October 07, 2014, 05:11:37 PM
I already have a problem, the auction was 2 peices for $12:50, ordered 2 for $25.00 meaning 4 pieces, and guess what, I got two in the mail, not 4. sigh.
Does your purchase history reflect a 2 quantity order? (4 pieces) I know you probably already checked but... figured I would ask.
If so... sounds like yo need to be messaging somebody... :-\
Yeah I did and crazy enough he acknowledged a mistake on his part and he will be send ing out the other two. Good customer service is so hard to come by these days, I'm almost knocked over when I get it!
Ok so another question on the Dirtbag. No, not when is going to be released.
On my current dirtbag(which is awesome) I have a switch for vibe/chorus. Is it worth putting a pot here like the original? If so what kind of pot assuming a linear pot, but which one 10k, 100k, 1M?
Quote from: aballen on October 08, 2014, 12:28:55 PM
If so what kind of pot assuming a linear pot, but which one 10k, 100k, 1M?
100KB
Quote from: aballen on October 08, 2014, 12:28:55 PM
Ok so another question on the Dirtbag. No, not when is going to be released.
On my current dirtbag(which is awesome) I have a switch for vibe/chorus. Is it worth putting a pot here like the original? If so what kind of pot assuming a linear pot, but which one 10k, 100k, 1M?
I'm not aware of the DMM ever using a pot to blend between these caps, but I don't know every version they've ever done, either. The standard modulation control is for depth. The DB3 also has a rate control. But a 100kB for frequency control like GL suggested would work, I think. If you are doing that you might even go further with the two caps and use 4u7 and 220n in place of 2u2 and 470n.
Did a bit of looking. The pot value and schematic are easy to find...
(http://i197.photobucket.com/albums/aa79/LPValdez/IMG_0006.jpg)
As you can see, the Chorus/Vibrato pot is not a "substitute" for the toggle. IT is actually an additional control feature.
The chorus-vibrato pot is just a depth control as Bean said, otherwise why would there still be the chorus-vibrato toggle up top, it's just the name of the pot.
The DMM LFO is fairly standard really, so for a rate control it would replace (with resistance in series) the 910k resistor from pin 1 to 6 of the LFO OpAmp with a 1MC pot and ditch the toggle using just the 4u7 caps.
Yeah, the way it is labeled on the DMM is confusing. To "modern" eyes it appears to be an blend control rather than a depth control.
For the rate, I've got it set up just like Scruffie mentioned. The stopper resistor I've picked is actually pretty high at 120k but it gives it plenty of range. It gets ridiculously fast. I think I will see if I have room for an LED indicator on it as well.
Also, Scruffie, you mentioned about running the clock and LFO on the same voltages earlier in the thread. Agreed. That makes much more sense. Luckily it is an easy adjustment. That was an oversight on my part. On the MN3008 proto it does not have an impact in noise or performance but there is no reason not to do this esp. if we start getting into split rails for different voltages on the BL3208.
Just a heads up Brian....
Although they are still somewhat readily available... Belling has STOPPED producing the BL3208. They are only manufacturing the 3207 for now.
Quote from: Govmnt_Lacky on October 08, 2014, 02:35:41 PM
Just a heads up Brian....
Although they are still somewhat readily available... Belling has STOPPED producing the BL3208. They are only manufacturing the 3207 for now.
Oh yeah, I know. It's disappointing. But, they are still available for now through eBay etc. I got several good ones just a couple of weeks ago. I will also be posting an adapter board on OSH park so you can use the smaller BL3208a chips.
Quote from: madbean on October 08, 2014, 02:42:27 PM
I will also be posting an adapter board on OSH park so you can use the smaller BL3208a chips.
These are also out of production sadly :-\
I believe the only BBD chips you can get with longer than 1024 stages (and still in production) is Cool Audio... Ugg ::)
I was looking an a newer DMM. Seems they don't have a switch anymore. I see what you guys are saying though. The DBD has a switch just like the early DMM, and modulation control in a pot.
(http://img.tapatalk.com/d/14/10/08/5emavaze.jpg)
It might a rotary. Dunno. In any case, it is worth checking out what a blend would be like there. I'll look into it an report my findings.
The thing that is curious about the BL3208 is that EHX is using them in the Memory Boy. So, I wonder what prompted the discontinuation since they must buy them by the ton (it takes four for each one). Maybe EHX is developing their own BBD? Who knows.
Correct me if I am wrong but... I believe that IS a switch on the new model. Instead of a slide switch, they used a rotary.
Quote from: madbean on October 08, 2014, 02:52:14 PM
The thing that is curious about the BL3208 is that EHX is using them in the Memory Boy. So, I wonder what prompted the discontinuation since they must buy them by the ton (it takes four for each one). Maybe EHX is developing their own BBD? Who knows.
You may be right however, I can confirm that Belling no longer makes a 2048 or 4096-stage BBD. I have seen other "brands" in pedals before though. (for some reason... CD3208 sounds familiar)
Ok maybe I'm blind, is there a switch in that pic I posted?
Looks like a rotary switch to me, too.
For a potentiometer it would point a bit below 0.
Edit: The manual (http://www.ehx.com/assets/instructions/deluxe-memory-man.pdf) confirms this.
Quote from: madbean on October 08, 2014, 02:52:14 PM
It might a rotary. Dunno. In any case, it is worth checking out what a blend would be like there. I'll look into it an report my findings.
The thing that is curious about the BL3208 is that EHX is using them in the Memory Boy. So, I wonder what prompted the discontinuation since they must buy them by the ton (it takes four for each one). Maybe EHX is developing their own BBD? Who knows.
MXR use them too, maybe they're only accepting industrial sized orders now?
Ah well, V3208D is still good.
Quote from: Scruffie on October 08, 2014, 02:59:07 PM
MXR use them too, maybe they're only accepting industrial sized orders now?
I actually contacted Belling while doing research for work. They told me straight up that they do not manufacture them anymore. For any quantity. So, if MXR and EHX are using them they are either second-hand bulk purchases OR another brand (Chinese??)
Quote
Ah well, V3208D is still good.
As long as they do not have the static and noise issues that the long run of V3205s had. :-\
I did get a few of the V3208 from SMB recently but have not tried them yet. These are from the batch that was supposedly QA'd by Ed Rembold, or whatever. But, I think they are also 5v unlike the BL's which are 10v or so. Or, maybe that doesn't matter that much.
Quote from: madbean on October 08, 2014, 03:07:51 PM
I did get a few of the V3208 from SMB recently but have not tried them yet. These are from the batch that was supposedly QA'd by Ed Rembold, or whatever. But, I think they are also 5v unlike the BL's which are 10v or so. Or, maybe that doesn't matter that much.
They should be 10V too.
Yes the issue was with the 3205, smallbear has stopped stocking them until coolaudio gets through their current batch of bad chips (I think Steve might have said November for the new lot which shouldn't have the issues fingers crossed) far as I know, the 08 are perfectly fine.
Quite possible as an end of line thing EHX & MXR just bought up huge quantities of stock and sourced more from brokers then to supplement, guessing a lot were made over the years, probably enough for them to keep the pedals in production for a few years, I mean EHX is still using MN3008 and they've been gone at least 15 years now. It's very possible down the line new chips will be produced or they'll just use coolaudio, I know MXR have 3204 produced for them (I suspect by Coolaudio as they are v3204).
Quote from: madbean on October 08, 2014, 02:32:20 PM
Also, Scruffie, you mentioned about running the clock and LFO on the same voltages earlier in the thread. Agreed. That makes much more sense. Luckily it is an easy adjustment. That was an oversight on my part. On the MN3008 proto it does not have an impact in noise or performance but there is no reason not to do this esp. if we start getting into split rails for different voltages on the BL3208.
Yeah that was mainly for using BL3208, you don't want the LFO running at the 15V and the clock at 10V but it's fine for the 3008 too.
Quote from: kothoma on October 08, 2014, 02:56:37 PM
Looks like a rotary switch to me, too.
For a potentiometer it would point a bit below 0.
Edit: The manual (http://www.ehx.com/assets/instructions/deluxe-memory-man.pdf) confirms this.
I stand corrected. A two position rotary... Why? Are they more reliable than switches?
Quote from: aballen on October 09, 2014, 12:40:44 AM
A two position rotary... Why? Are they more reliable than switches?
I wouldn't know. Perhaps aesthetics? Or uniformity? Many of their newer pedals have a 6 knobs in a row theme.
Quote from: kothoma on October 09, 2014, 10:44:56 AM
Quote from: aballen on October 09, 2014, 12:40:44 AM
A two position rotary... Why? Are they more reliable than switches?
I wouldn't know. Perhaps aesthetics? Or uniformity? Many of their newer pedals have a 6 knobs in a row theme.
I would think this is the reason, plus I think rotaries give less strain on the PCB than a board mounted toggle so perhaps some improved reliability.
Anyone try out their 3k8's from that ebay seller yet? I'm waiting on a part to finish my aquaboy so I haven't been able to test them yet.... I'll report back once I do but was just wondering... THX
Quote from: ggarms on October 11, 2014, 08:41:27 PM
Anyone try out their 3k8's from that ebay seller yet? I'm waiting on a part to finish my aquaboy so I haven't been able to test them yet.... I'll report back once I do but was just wondering... THX
They should be fine. I have three verified pairs now...
That's awesome. I just did an inventory and I'm starting to accumulate these. What else is worth building with the 3008?
I ve tested 5 pairs of those mn's and every one is working perfect.
I believe BBDs seller's are legit.
I am waiting another batch of 5 pairs from him, I ll update the results when I test them.
My 4 are working as well.
I'm gonna go out on a limb and say the dirtbag isn't gonna be released in October... :(
Quote from: Alaboogie on October 30, 2014, 09:08:24 PM
I'm gonna go out on a limb and say the dirtbag isn't gonna be released in October... :(
Agreed
I'm sure he's making sure it is extra great for us, not to mention super busy with the f(x) stuff, and the etchers paradise drop to boot...The bean will sprout soon!
It's "next batch" for sure. The release date is fluid but it will be in the next batch of releases, absolutely. I'm taking my time with this....frustrating, I know. But, necessary.
I know it's gonna be so sick that I will be able to sell the dmmxo that I currently have on my board and buy something else I'm gas'ing for so its worth waiting for...the 3008's I got from chrome has been sitting patiently in its drawer for like 2 months haha. Maybe they expired already :P
It will come. The size of this thread alone shows how much demand there is. I think Brian actually did a great thing switching to a 4x3008 layout as well. Really well timed because 3008s have really become near impossible to get your hands on lately.
I have a DBD proto from last year(2x3008s) and it sounds awesome. Brian knows this circuit well, I'm sure the next incarnation will be more than worth the wait.
I know this project will be awesome when it comes, but speaking honestly, I do feel a little frustrated that I've believed yet again that this project was just around the corner. I've been looking to buy a DMM board now since late 2013, and it's had countless delivery dates set and then missed.
Worst part is, I feel like if I don't keep checking the projects page every few days then it will arrive and sell out before I get one ordered.
Sorry for the vent, but I simply mean it as honest feedback. Brian does amazing work all around, with the sole exception of somewhat chronic over-promise/under-deliver on delivery dates. I still love him for everything else, but please...please, can we work on these published dates a bit?
This is probably why Blizzard is infamous for deadlines like "Soon", "Real Soon", and "It will be done when it's done." (Expansions and actual games are some of the rare exceptions when actual calendar dates are handed out.)
It will definitely be out before Half-Life 3.
Quote from: Jopn on November 01, 2014, 06:49:04 PM
I know this project will be awesome when it comes, but speaking honestly, I do feel a little frustrated that I've believed yet again that this project was just around the corner. I've been looking to buy a DMM board now since late 2013, and it's had countless delivery dates set and then missed.
Worst part is, I feel like if I don't keep checking the projects page every few days then it will arrive and sell out before I get one ordered.
Sorry for the vent, but I simply mean it as honest feedback. Brian does amazing work all around, with the sole exception of somewhat chronic over-promise/under-deliver on delivery dates. I still love him for everything else, but please...please, can we work on these published dates a bit?
It's frustrating, but it's just inherent to the process. There are tweaks, changes, tests, rethinking, retesting, optimizing and all the 'unknown unknowns.' Then on top of that, there's waiting 3-4 weeks for each prototype revision. That's why 'soon' actually and truly can mean a few months or a year.
Quote from: madbean on November 01, 2014, 07:32:41 PM
It will definitely be out before Half-Life 3.
Confirmed: Brian operates on Bean Time.
Quote from: jubal81 on November 01, 2014, 07:46:53 PM
Quote from: Jopn on November 01, 2014, 06:49:04 PM
I know this project will be awesome when it comes, but speaking honestly, I do feel a little frustrated that I've believed yet again that this project was just around the corner. I've been looking to buy a DMM board now since late 2013, and it's had countless delivery dates set and then missed.
Worst part is, I feel like if I don't keep checking the projects page every few days then it will arrive and sell out before I get one ordered.
Sorry for the vent, but I simply mean it as honest feedback. Brian does amazing work all around, with the sole exception of somewhat chronic over-promise/under-deliver on delivery dates. I still love him for everything else, but please...please, can we work on these published dates a bit?
It's frustrating, but it's just inherent to the process. There are tweaks, changes, tests, rethinking, retesting, optimizing and all the 'unknown unknowns.' Then on top of that, there's waiting 3-4 weeks for each prototype revision. That's why 'soon' actually and truly can mean a few months or a year.
Not only that, but a circuit as complicated as the Dirtbag requires more testing to make sure it's been vetted as much as possible. If there turn out to be issues, it would result in a whole lot of help needed threads and frustrated builders.
Quote from: pickdropper on November 01, 2014, 08:05:57 PM
Not only that, but a circuit as complicated as the Dirtbag requires more testing to make sure it's been vetted as much as possible. If there turn out to be issues, it would result in a whole lot of help needed threads and frustrated builders.
Don't get me wrong, I COMPLETELY get this. But if we're still in the prototyping and testing phase, maybe don't publish that's it's coming out this month.
My guess would be that he felt that it was pretty close to sorted, then found one of those subtly awful flaws.
Quote from: Jopn on November 01, 2014, 11:58:14 PM
Quote from: pickdropper on November 01, 2014, 08:05:57 PM
Not only that, but a circuit as complicated as the Dirtbag requires more testing to make sure it's been vetted as much as possible. If there turn out to be issues, it would result in a whole lot of help needed threads and frustrated builders.
Don't get me wrong, I COMPLETELY get this. But if we're still in the prototyping and testing phase, maybe don't publish that's it's coming out this month.
In a perfect world I would not. But, there are also only so many emails I'm going to be able to tolerate with "when is xyz coming out?" So, either way someone is disappointed...but one way gets me off the hook for a while ;D ;D
Quote from: madbean on November 02, 2014, 12:25:25 AM
Quote from: Jopn on November 01, 2014, 11:58:14 PM
Quote from: pickdropper on November 01, 2014, 08:05:57 PM
Not only that, but a circuit as complicated as the Dirtbag requires more testing to make sure it's been vetted as much as possible. If there turn out to be issues, it would result in a whole lot of help needed threads and frustrated builders.
Don't get me wrong, I COMPLETELY get this. But if we're still in the prototyping and testing phase, maybe don't publish that's it's coming out this month.
In a perfect world I would not. But, there are also only so many emails I'm going to be able to tolerate with "when is xyz coming out?" So, either way someone is disappointed...but one way gets me off the hook for a while ;D ;D
Running your site like you want to, the nerve...😜
The solution is make a BIG batch of Dirtbag pcbs, I think this project is the most expected for me and all members of this forum, a batch with a great number of boards probably will let everyone happy! haha
I'm very excited, I've got my 2 pairs of MN3008 and I want dirtbag board a lot, just for curiosity I've paid something about $75 (converted from brazil real for us dolar) for my bad luck ;//
Everyone knows that you make a great job with your pcbs, just for it everybody are very excited and nobody want lost this pcb (include myself).
Regards from Brazil and sorry if my english is not good, I hope everybody understand what I wanted to say. ;D ;D
Problem is, if you get a lot of boards done, and there is a major problem, you've just lost a LOT of money, so it's better to get a proto board done first, THEN order the big batch.
I'll turn this car around and then no one'll get any Dirtbag!
Quote from: alanp on November 02, 2014, 02:57:24 AM
Problem is, if you get a lot of boards done, and there is a major problem, you've just lost a LOT of money, so it's better to get a proto board done first, THEN order the big batch.
Yeah and for chips that are not exactly easy to come by. Even if the boards are perfect it could take some time to sell them.
Maybe a preorder thread for this project would help, so Brian can have an estimate number of boards he'll sell right away. Add let's say 30 boards to that number and hopefully everyone will get one.
All in favor? ^^
It's really up to Brian if he wants to do something like that. I don't think that is what everyone is suggesting. Just that there are a lot of reasons to be patient.
Quote from: aballen on November 02, 2014, 02:26:21 PM
It's really up to Brian if he wants to do something like that. I don't think that is what everyone is suggesting. Just that there are a lot of reasons to be patient.
Yep. Everybody is excited, which is awesome. But really, I think everybody is excited for a properly functioning, tested board.
I think enthusiasm would be tempered quickly if the boards were problematic as troubleshooting a build of that size can be REALLY frustrating. Even in an ideal state, this is a challenging build. It's really better for everybody if the boards are as solid as possible.
That's not what I meant. Of course, I want the boards to be verified before release, as anyone else. From the previous posts I thought a preorder-list would minimize the anxiety of someone not getting a board due to a too small initial batch as the estimate amount would be known. Just an idea.
Good things come to those who wait.
I do quite a few PCB designs myself for circuits much much simpler, these normally go through 3-4 iterations before I am happy with the design. Even then there has been a time when a glaringly obvious mistake was discovered a few days after the boards have started production.
Quote from: Scruffie on November 02, 2014, 03:11:46 AM
I'll turn this car around and then no one'll get any Dirtbag!
I just love this ... ideal Brian follow-up: "Don't MAKE me stop this car!!"
You damn kids, with your Dirtbags, and your electricity. When I was your age, if we wanted analog delay, we went to a cave and yelled really loud. Sometimes we got attacked by bears, but goddammit, that's how we liked it.
Quote from: m-Kresol on November 02, 2014, 02:24:37 PM
Maybe a preorder thread for this project would help, so Brian can have an estimate number of boards he'll sell right away. Add let's say 30 boards to that number and hopefully everyone will get one.
All in favor? ^^
That's a great idea, i'm sure everyone anxiously checks the project page every day, multiple times even, just to see whether or not the dirtbag got released and subsequently to their horror sold out within 15 minutes. It would definitely relieve everyone of trying to get their dirtbag order early, although I don't mind it being released as usual on the projects page.
I know that Bean is working extremely hard on the dirtbag, which seems to be the most in demand (most anticipated) release apart from the sunking I've seen since i've joined (I'm a noob here i know i know). Gotta make sure all the kinks are worked out!
Pre-order would be the opposite way to go if Brian would prefer less pressure on a release date.
I'll be ordering 100 boards for the initial run. This should be enough to stay in stock for a couple of weeks, even if it does sell well.
Quote from: madbean on November 01, 2014, 07:32:41 PM
It will definitely be out before Half-Life 3.
Priceless!
btw... been so long for a new HL, I completely forgot about that one
hehee 8)
Whoa, if there ever is a new HL I might even just break the hiatus of 15 years and go back to gaming ha!
I am excited for the dirtbag 3 too. I have decided that I hate all digital delays. There's not one that I have tried that inspired me to play. I look at em just as tools to get the job done. That's why I have the DL4 still. Looking forward to some analog goodness. Thanks Brian!
@cortex have your tried the multiplex? It's filtered
Like an analog delay, I think it sounds great. Also the hamlet+ is pretty great too. Definitely both digital, but just great delays. If you are looking for a DMM though, there really is nothing quite like it.
Well yeah, my dream is getting the blue box one from the late seventies to complete my seventies board, there are 4 more pedals from the seventies waiting for the delay to make that bunch whole.
So, if somebody has a blue box DMM I might be in in a couple of months (basically broke at the moment).
Didn't mean to disrupt the topic. Yay dirtbag delay!
I am trying to source some original MN3008 chips and spotted those eBay listings:
http://www.ebay.com/itm/360261783432?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.com/itm/1PC-MN3008-3008-Low-Noise-BBD-CHIP-ICs-NEW-/180810623454
Does anyone have experience with these e-bay sellers "janeh2100" and "greenhouse408"? Strangly they are using the same picture! But are there even fake MN3008s?
They look nice and fake to me, use the supplier others have had success with in this thread.
Ceitron's ebay store has been out recently (http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291255711068? (http://www.ebay.com/itm/MN3008-Original-Panasonic-Matsushita-8P-DIP-IC-2-pcs-/291255711068?)), but I know Chromosphere (from this forum) has some in: http://www.diyguitarpedals.com.au/shop/index.php?main_page=product_info&cPath=4&products_id=123 (http://www.diyguitarpedals.com.au/shop/index.php?main_page=product_info&cPath=4&products_id=123). Individually tested before shipping too; that's where I got mine. Looking forward to trying them out!
I recently ordered 4 from both Janeh and funkward. Both sets were all legit. I also sent a message to them prior advising I would dispute and leave bad feedback if they sent fakes. Not sure if that made a difference, but I figured it would be worth a shot.
Quote from: ggarms on November 06, 2014, 10:42:37 PM
I recently ordered 4 from both Janeh and funkward. Both sets were all legit. I also sent a message to them prior advising I would dispute and leave bad feedback if they sent fakes. Not sure if that made a difference, but I figured it would be worth a shot.
I thought about ordering from Janeh to save a little bit of cash, but I am always concerned ordering bbds from china.