Print Page - Some help Cloning the EH Echoflanger.

Title: Some help Cloning the EH Echoflanger.
Post by: nelson on August 06, 2005, 09:36:43 AM

I have hit a snag cloning the Echoflanger. :( The "multi effect" delay, chorus, flanger and "filter matrix" pedal.

The PCB pattern that Stephen giles posted that I have been working with doesnt seem to match the schematic I have. The cd4009 and cd4013, the way they are laid out doesnt match the schem.

Perhaps I am missing something with the switching??

I have converted my progress to a PDF file which can be looked at here

http://www.auaj24.dsl.pipex.com/EHEFUF.pdf

for those that dont have the schematic who could possibly help me it is here

http://www.auaj24.dsl.pipex.com/EHE1.jpg

http://www.auaj24.dsl.pipex.com/EHE2.jpg

Any help, comments new questions etc are most welcome.

I am also looking for a site to host this once its verified.

And finally I am trying to source some rev log 2M pots.

Can anyone help me?

:idea: :)

Title: Some help Cloning the EH Echoflanger.
Post by: nelson on August 08, 2005, 01:24:17 PM

ok snag overcome, the CD4009 on the schem has been replaced by a CD4049 in the actual pedal.

Thanks ToneB!

8)

Title: Some help Cloning the EH Echoflanger.
Post by: puretube on August 08, 2005, 01:34:24 PM

that`s exactly what I had expected... :P

Title: Some help Cloning the EH Echoflanger.
Post by: britt-stinker on August 08, 2005, 02:58:15 PM

Hey
you have comed a long way.!

You wrote something to me, asking if I could help you with something, but I accidently deleted the message - so what was it, if you need help anymore?

Title: Some help Cloning the EH Echoflanger.
Post by: nelson on August 08, 2005, 05:06:54 PM

Quote from: puretubethat`s exactly what I had expected... :P

Well why didnt you say something!!!

:lol:

yeah britt, I will send you a PM, have to thank you too, your help/photos are invaluable. :)

The switch is confusing me, cant seem to find an equivelant.

Title: Some help Cloning the EH Echoflanger.
Post by: puretube on August 08, 2005, 05:12:02 PM

Quote from: nelson
Quote from: puretubethat`s exactly what I had expected... :P
Well why didnt you say something!!!...

coz I`m in love with 4069... :P

and: NEVER trust a schem on the web;
AND:

Never trust a layout on the web!

(even when it is, or looks like a factory draw!!!)

btw: I seldom type 3 explanation marx... :wink:

Title: Some help Cloning the EH Echoflanger.
Post by: nelson on August 08, 2005, 05:46:05 PM

Sound advice puretube.

It is somewhat accurate, manufacturing needs appear to have replaced one minor aspect of the design!!!. My redraw of the schematic will be the *only* one that is available publically, that is accurate :). Its only taken 28 years.....

(sigh)

Title: Some help Cloning the EH Echoflanger.
Post by: Vsat on August 08, 2005, 06:22:12 PM

Recently looked at an EH Memory Man Deluxe that had an unsoldered chip between the MN3005(s) and the clock circuit - the PCB layout indicated it was probably a CD4049.... put in a 4049 and it worked. Another case of the actual EH unit not matching the schematics on the web.
Cheers, Mike

Title: Some help Cloning the EH Echoflanger.
Post by: StephenGiles on August 09, 2005, 08:01:43 AM

Mike, I'm sure I saw a memory man circuit which included a 4049, with a note that it was only included in models shipped up to a certain date - probably late 70s or early 80s.
Stephen

Title: Some help Cloning the EH Echoflanger.
Post by: nelson on August 09, 2005, 09:09:32 AM

only about 20 resistors to go ...... :lol:

8)

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DIY Stompboxes => Building your own stompbox => Topic started by: nelson on August 06, 2005, 09:36:43 AM