Print Page - Economy memory man, a simple analog delay

Title: Economy memory man, a simple analog delay
Post by: thomasha on July 02, 2019, 02:57:48 PM

Long time without posting, but since I started with BBDs I had a lot of new (old) material to read. Thanks to Scruffie I could find the economy memory man. It's just a smaller version, without all the filtering and extra modulation and the compander, so it should fit in a smaller enclosure. I wonder why I can't find this pedal built more often...

I started with this schematic
(https://sites.google.com/a/davidmorrin.com/www/_/rsrc/1424189195137/home/trouble/troubleeffects/electro-harmonix-memory-man/eh-7810/EH%207810%20schem.gif)

and made some changes to a simple 9v power supply and the cheaper v3205 v3201 combo.
Since I used a different clock, there is no chorus in this one.

The boost was also reduced with a 2.7k resistor, just to overcome the volume drop at the centre of the blend pot.
(https://i.imgur.com/kSuwNUml.jpg)
(https://i.imgur.com/AGXRxRHl.jpg)
(https://i.imgur.com/niKs6pul.jpg)
(https://i.imgur.com/laiTfZql.jpg)
(https://i.imgur.com/DbhkBi6l.jpg)

Title: Re: Economy memory man, a simple analog delay
Post by: pickdropper on July 02, 2019, 03:14:36 PM

This is fantastic on so many levels.

Title: Re: Economy memory man, a simple analog delay
Post by: mjg on July 02, 2019, 03:16:36 PM

As usual, another amazing tiny build. I always struggle to believe you can close the lid on these things! ;D

Title: Re: Economy memory man, a simple analog delay
Post by: dawson on July 02, 2019, 04:10:30 PM

Thomasha for President 2020.

Title: Re: Economy memory man, a simple analog delay
Post by: selfdestroyer on July 02, 2019, 05:13:37 PM

Damn... just damn.

Amazing build. Love the artwork also!

What knobs are those? I have been looking for a few smaller diameter knobs for a few synth builds I am working on and those look great.

Title: Re: Economy memory man, a simple analog delay
Post by: gordo on July 02, 2019, 05:55:48 PM

Unbelievable. That's like the pedal equivalent of a clown car...

Title: Re: Economy memory man, a simple analog delay
Post by: dan.schumaker on July 02, 2019, 06:10:15 PM

Holy hell! Awesome man!

Title: Re: Economy memory man, a simple analog delay
Post by: sarde on July 02, 2019, 07:58:10 PM

I'm overwhelmed and amazed at this. Any chance of a demo video?

Title: Re: Economy memory man, a simple analog delay
Post by: alanp on July 02, 2019, 08:12:47 PM

Simple... Yeah...

Edit -- I also like how you even used the weird footprint of the MN3005 to squeeze another millimeter of space in for the trimpots.

Title: Re: Economy memory man, a simple analog delay
Post by: EBK on July 03, 2019, 03:09:09 AM

Someone needs to find Thomas some smaller enclosures to work with. He's no longer being challenged. ;D

Title: Re: Economy memory man, a simple analog delay
Post by: jprizz on July 03, 2019, 04:39:41 AM

holy shnikees! At first I thought 'No Way he fit that delay into that little thing', then I scrolled farther down... jaw hits the desk!

That.Is.Impressive!

Title: Re: Economy memory man, a simple analog delay
Post by: DLW on July 03, 2019, 09:04:46 AM

Holy jeebus. You even moved the trimmers in between the nubs of the MN3005 to maximize space?

At some point, will you please post pictures of a pedal board of 1590LBs, so I can cry myself to sleep at night.

Title: Re: Economy memory man, a simple analog delay
Post by: fair.child on July 03, 2019, 09:11:31 AM

This is going to be build of the year 2019. Geez, very fantastic build!

Title: Re: Economy memory man, a simple analog delay
Post by: thomasha on July 03, 2019, 09:48:55 AM

Thanks for the kind words guys!
I added some extra pictures of the board that I forgot yesterday...

QuoteWhat knobs are those? I have been looking for a few smaller diameter knobs for a few synth builds I am working on and those look great.

https://www.aliexpress.com/item/32812304696.html?spm=a2g0s.9042311.0.0.7c694c4dixEsEo (https://www.aliexpress.com/item/32812304696.html?spm=a2g0s.9042311.0.0.7c694c4dixEsEo)

But they are for knurled pots, so I had to sand them. I use a 6 mm drill bit and sanding paper until it fits. Unfortunately the 6.5 mm drill bit is too big.

QuoteYou even moved the trimmers in between the nubs of the MN3005 to maximize space?

yep, the weird footprint of the BBD helped. The output balance trimmer really helps reducing the whining.

Title: Re: Economy memory man, a simple analog delay
Post by: Bio77 on July 03, 2019, 09:57:36 AM

Great build! I had the same thought as when I saw your Electric Mistress build. This is like a fine watch, a piece of art.

Quote from: EBK on July 03, 2019, 03:09:09 AM
Someone needs to find Thomas some smaller enclosures to work with. He's no longer being challenged. ;D

He will eventually be limited by the size of a toe!

Title: Re: Economy memory man, a simple analog delay
Post by: m-Kresol on July 03, 2019, 01:51:33 PM

Quote from: pickdropper on July 02, 2019, 03:14:36 PM
This is fantastic on so many levels.

This is ~~fantastic~~ madness on so many levels. Fixed that mistake for you Dave.

Seriously, it's just crazy how you do your builds. Never seize to amaze me.

Title: Re: Economy memory man, a simple analog delay
Post by: flanagan0718 on July 03, 2019, 01:57:55 PM

This is GLORIOUS!!! You are a Wizard!

Sent from my iPhone using Tapatalk

Title: Re: Economy memory man, a simple analog delay
Post by: midwayfair on July 03, 2019, 06:18:34 PM

Title: Re: Economy memory man, a simple analog delay
Post by: benny_profane on July 03, 2019, 06:50:55 PM

Well, there's just no way you're gonna get the delay times you're after like that! You gotta have at least a 8x7" box for the sounds to bounce around and really build up that delay time.

Title: Re: Economy memory man, a simple analog delay
Post by: Marshall Arts on July 04, 2019, 12:56:35 AM

Quote from: EBK on July 03, 2019, 03:09:09 AM
Someone needs to find Thomas some smaller enclosures to work with. He's no longer being challenged. ;D

...right... or... Build one, that can also hold a battery in the same enclosure ;-)

Title: Re: Economy memory man, a simple analog delay
Post by: ahiddentableau on July 04, 2019, 08:40:31 PM

Another amazing build. I bow down to you and the helpful Oompa-Loompa you hire to use his tiny little hands to finish the wiring!

Title: Re: Economy memory man, a simple analog delay
Post by: thomasha on July 11, 2019, 12:46:52 PM

So when I finally had some time to make a video,
I realized I have no idea what to play.

So, just as an update, the clock was set to max delay at 155k, so 55k more than the original.

And the final schematic:
(https://i.imgur.com/Xp0GKL1.png)

Title: Re: Economy memory man, a simple analog delay
Post by: thomasha on November 19, 2019, 12:52:45 PM

So, after building the deluxe memory man I decided to add another BBD to get more time out of this circuit too.
(https://i.imgur.com/md3JXPTl.jpg)
That small yellow cap goes to another BBD between the potentiometer and the output jack. I twisted the clock wires, in white, so that there is no clock signal going direct to the input jack (in my first attempt that happened...). Interesting to see that stuff learned with tube amps also applies here even at much higher frequencies.

To compare the new version of the economy memory man with the DMM I made a short video.

I played the same lick to show the different sounds. Now the delay of the dirtbag sounds shorter, but still much brighter. Both are nice builds, but in the video the dirt bag sounds much fuller, while the economy memory man is kind os sterile. On the other hand, the economy version as much more low end.

Title: Re: Economy memory man, a simple analog delay
Post by: lars on November 20, 2019, 07:46:02 AM

Yes. My first thought too was that you needed to add more components to that tiny enclosure. You have at least two atoms worth of space still!
Very impressive. You will be the first person to have an entire pedalboard made of a Les Paul pickgaurd.

Title: Re: Economy memory man, a simple analog delay
Post by: dan.schumaker on November 20, 2019, 07:51:11 AM

Quote from: thomasha on November 19, 2019, 12:52:45 PM
So, after building the deluxe memory man I decided to add another BBD to get more time out of this circuit too.

My first thought was "where are you going to add another?" Good job man, looks and sounds awesome!

Title: Re: Economy memory man, a simple analog delay
Post by: Marshall Arts on November 20, 2019, 08:07:37 AM

I think there is still room for a battery :-)

Title: Re: Economy memory man, a simple analog delay
Post by: Govmnt_Lacky on November 20, 2019, 12:59:41 PM

Just out of curiosity... did anyone else notice the LED on the dirtbag blink a few times around the 0:50 to 0:55 mark? Is that a function of the build? If not... might want to look at it just in case :o

Title: Re: Economy memory man, a simple analog delay
Post by: thomasha on November 20, 2019, 02:26:31 PM

The led blinking is the overload circuit. THe led only blinks whe the signal is strong enough to distort the signal. When the level is maxed it is always on.

Title: Re: Economy memory man, a simple analog delay
Post by: Govmnt_Lacky on November 21, 2019, 07:15:25 AM

Quote from: thomasha on November 20, 2019, 02:26:31 PM
The led blinking is the overload circuit. THe led only blinks whe the signal is strong enough to distort the signal. When the level is maxed it is always on.

Very nice! 8)

Title: Re: Economy memory man, a simple analog delay
Post by: diablochris6 on November 22, 2019, 02:26:43 PM

Somehow I missed this original post. Simply amazing. Maximum impact and efficiency! I'm calling you when I need to pack my car for vacation.

Title: Re: Economy memory man, a simple analog delay
Post by: cooder on November 24, 2019, 05:22:20 PM

Jeeeeeeezzz.... :o

Title: Re: Economy memory man, a simple analog delay
Post by: nzCdog on November 25, 2019, 11:01:07 AM

Dude you're inspiring. I love seeing these projects :)

madbeanpedals::forum

Projects => Build Reports => Topic started by: thomasha on July 02, 2019, 02:57:48 PM