(https://i.imgur.com/aqB0BPY.jpg)
Alright, let's see what I did RoNg this time. Just a few things to get out of the way:
I routed all wire off to the left, to avoid the LFO/clock as much as possible.
The reg looks backwards, but the part I have (ST L78L05CZ) has reversed pins.
The 33uF caps (C26, C27, C35) are tantalum (supposedly bipolar??), but are oriented off lead length (no pole indicators) just in case.
Those friggin Xvive labels are terrible to see in any light, but is a 3007. It and the 3101 were both working when I pulled them from my Pork Barrel.
During calibration I get next to no signal from TP2 (unless I really crank up the gain on my desktop amp), and even when I adjust it to be the clearest, there's still LFO tick.
The 22k trimpots are 20k
When I try to calibrate the clock with my Fluke, I'm barely getting 3 kHz (at least I think I'm using it correctly).
Actually now I'm listening again, it's not self-oscillating, though I'm sure how that would sound on this particular circuit to tell, so at any rate, T1 for feedback doesn't really have a dramatic effect
Apologies if I've forgotten something basic :-\
alright, I've still got intense ticking, but here's a video :P
Sorry it's over 5 minutes. I re-flowed everything, and can't figure out what's going on. Any ideas would be welcome :) Thanks.
Are you sure about your voltage regulator? I used an ST Micro 78L05ACZ on both of my fraudhacker builds and it's oriented just like the silkscreen on the pcb.
Quote from: blackhatboojum on March 10, 2023, 04:03:08 PM
78L05ACZ
Yeah, I need to get rid of the remaining few of whatever I have, because it's an extra variable with builds like this that need a reg— it's an
L78L05ACZ https://www.taydaelectronics.com/datasheets/A-176.pdf which has the I/O pins reversed...at least on the diagram.
I am half tempted to clip it and splice in a standard one where there's no mystery. In a wonderful happenstance, a number of non-L specimens showed up in a big batch of NPNs while I was measuring them all.
Quote from: jessenator on March 08, 2023, 02:08:07 AM
The 33uF caps (C26, C27, C35) are tantalum (supposedly bipolar??), but are oriented off lead length (no pole indicators) just in case.
Fairly certain that Tant caps cannot be bipolar. Unless you use 2 in series with the same polarities connected like C27/C27).
As long as you put the longer lead into the (+) pad then you should be ok
Quote from: jessenator on March 10, 2023, 04:34:48 PM
Quote from: blackhatboojum on March 10, 2023, 04:03:08 PM
78L05ACZ
Yeah, I need to get rid of the remaining few of whatever I have, because it's an extra variable with builds like this that need a reg— it's an L78L05ACZ https://www.taydaelectronics.com/datasheets/A-176.pdf which has the I/O pins reversed...at least on the diagram.
I am half tempted to clip it and splice in a standard one where there's no mystery. In a wonderful happenstance, a number of non-L specimens showed up in a big batch of NPNs while I was measuring them all.
Yep, That's the exact voltage regulator I've used on all of my boss and ibanez flanger builds. Same exact part number and I purchased them from Tayda. You definitely have yours in the wrong direction.
EDIT: The pin connection on that datasheet for the TO-92 package is BOTTOM view. I think that's why your getting confused.
Quote from: blackhatboojum on March 10, 2023, 05:48:28 PM
Yep, That's the exact voltage regulator I've used on all of my boss and ibanez flanger builds. Same exact part number and I purchased them from Tayda. You definitely have yours in the wrong direction.
(https://i.imgur.com/zl9AEEh.jpg)
well I flipped it just to see, and while not nearly as strong, the click remains… I feel like I've seriously borked something. Adjusting some of the pots also now stops modulation entirely…
Edit: also, I can now get a signal from TP2, so I've got that going for me. Also, by "cleanest sounding output": I'm hearing a heavily pitch-modulated sawtooth(?) sort of waveform (like on an analog synth), so am I looking for unmodulated? just a clean basic waveform tone?
Now that you have the voltage regulator sorted, Here's how I set up my fraudhackers. For the clock frequency, set your manual and depth knobs to minimum. Probe TP1 with your dmm on it's frequency setting and adjust your clock trimmer to 40kHz.
For bias, set your depth and res knobs to minimum. Input your sine wave. Now, audio probe TP2 or if you want to follow the official boss service notes, probe pin 1 of Q3, and adjust your bias trim to the cleanest sound.
For the resonance set manual and depth knobs to minimum. Set your res knob to max. Hook up the output of your pedal to an amp, and short the input jack tip to the sleeve. Now adjust T1 to just below self oscillation.
If you still have weird stuff going on after this then we'll have to do some more troubleshooting but your main initial issue has been corrected.
Quote from: Govmnt_Lacky on March 10, 2023, 04:55:56 PM
Quote from: jessenator on March 08, 2023, 02:08:07 AM
The 33uF caps (C26, C27, C35) are tantalum (supposedly bipolar??), but are oriented off lead length (no pole indicators) just in case.
Fairly certain that Tant caps cannot be bipolar. Unless you use 2 in series with the same polarities connected like C27/C27).
As long as you put the longer lead into the (+) pad then you should be ok
This
Sent from my iPhone using Tapatalk
I should also mention that there's a possibility your regulator might need to be replaced with a new one. I know they're sensitive to reverse polarity but, I'm not sure about having the input and output reversed.
Quote from: blackhatboojum on March 10, 2023, 06:41:04 PM
Now that you have the voltage regulator sorted, Here's how I set up my fraudhackers. For the clock frequency, set your manual and depth knobs to minimum. Probe TP1 with your dmm on it's frequency setting and adjust your clock trimmer to 40kHz.
For bias, set your depth and res knobs to minimum. Input your sine wave. Now, audio probe TP2 or if you want to follow the official boss service notes, probe pin 1 of Q3, and adjust your clock trim to the cleanest sound.
For the resonance set manual and depth knobs to minimum. Set your res knob to max. Hook up the output of your pedal to an amp, and short the input jack tip to the sleeve. Now adjust T1 to just below self oscillation.
If you still have weird stuff going on after this then we'll have to do some more troubleshooting but your main initial issue has been corrected.
Quote from: blackhatboojum on March 10, 2023, 07:13:29 PM
I should also mention that there's a possibility your regulator might need to be replaced with a new one. I know they're sensitive to reverse polarity but, I'm not sure about having the input and output reversed.
Thank you! I'll give this a try later today. I think I've been totally mixed up on this whole thing; so I've got a humble pie to eat.
If I hadn't already done a design for this enclosure, I would've called (my build, anyway) the FraughtHacker : P
Quote from: jessenator on March 10, 2023, 07:35:06 PM
Quote from: blackhatboojum on March 10, 2023, 06:41:04 PM
Now that you have the voltage regulator sorted, Here's how I set up my fraudhackers. For the clock frequency, set your manual and depth knobs to minimum. Probe TP1 with your dmm on it's frequency setting and adjust your clock trimmer to 40kHz.
For bias, set your depth and res knobs to minimum. Input your sine wave. Now, audio probe TP2 or if you want to follow the official boss service notes, probe pin 1 of Q3, and adjust your clock trim to the cleanest sound.
For the resonance set manual and depth knobs to minimum. Set your res knob to max. Hook up the output of your pedal to an amp, and short the input jack tip to the sleeve. Now adjust T1 to just below self oscillation.
If you still have weird stuff going on after this then we'll have to do some more troubleshooting but your main initial issue has been corrected.
Quote from: blackhatboojum on March 10, 2023, 07:13:29 PM
I should also mention that there's a possibility your regulator might need to be replaced with a new one. I know they're sensitive to reverse polarity but, I'm not sure about having the input and output reversed.
Thank you! I'll give this a try later today. I think I've been totally mixed up on this whole thing; so I've got a humble pie to eat.
You're welcome. We've all been there. I've had plenty of "Doh!" moments with some of my builds.
Build docs talk about LFO/clock ticking with 3001/3007 and no regulator. I think the regulator is a good candidate for what is wrong. Do you have a 3207 and 3201 you could try? I don't see much advantage for having a 3007 in this one.
Quote from: Bio77 on March 10, 2023, 09:05:26 PM
Build docs talk about LFO/clock ticking with 3001/3007 and no regulator. I think the regulator is a good candidate for what is wrong. Do you have a 3207 and 3201 you could try? I don't see much advantage for having a 3007 in this one.
Sadly no. I cannibalized those from my Pork Barrel, since I couldn't find any other BBDs for sale at the time I was building, but looks like they are back.
Well unless there's a clerical/inventory error, I might have just landed a MN3207/MN3102 pair...
If your clerical error doesn't work out, PM me. I have a few extra in my stash I could send you 8)
Quote from: Bio77 on March 11, 2023, 06:29:19 AM
If your clerical error doesn't work out, PM me. I have a few extra in my stash I could send you 8)
Thanks! I got the order and shipping confirmation from Cabintech, so I should be good.
So I was reading the documentation and was confused:
QuoteLastly, and because you may not already be confused enough, I did test running the circuit @ 9v with MN3207/
MN3102 but using a 6v regulator instead of 5v and that also worked just fine.
I didn't know if the 6V regulator mentioned means that it's a
requirement or not. Is a properly operational 5-6V regulator still required with a MN3207/MN3102 combo?
Quote from: jessenator on March 11, 2023, 05:59:52 PM
So I was reading the documentation and was confused:
QuoteLastly, and because you may not already be confused enough, I did test running the circuit @ 9v with MN3207/
MN3102 but using a 6v regulator instead of 5v and that also worked just fine.
I didn't know if the 6V regulator mentioned means that it's a requirement or not. Is a properly operational 5-6V regulator still required with a MN3207/MN3102 combo?
No, usually when you use a 3007 you can run at higher voltage and get some more head room. But Brian points out that in this circuit it's only possible to get a few more volts. I.e. using a 3007 isn't an improvement over 3207, but you can use it if that's all you can find. The 3207 is meant to run at 5V, but Brian said he ran it at 6V and it was also fine.
The 3207 line was made to increase the operating time when using a 9V batteries.
Thanks, everyone for the help!
I've got the 3207 and new reg in and it's working super fine now! Wish my meter measured frequency in the range necessary, but I just left the trimmer at 50% and called it a day.