Search found 42 matches

by nelson
16 Apr 2012, 19:29
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

it does seem okay, any builds? the new stereo poly chorus (both large chassis and die-cast aluminum) run with one MN3008 and one MN3009. Suprised to not see any gutshots of those here... The circuitry is a lot different, but does anyone know how it compares to the sound of the old one? This seems o...
by nelson
07 Apr 2012, 13:51
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

After I posted this I dumped the rotary switch and 4053 in favour of an SPDT toggle for the disconnecting the LFO and switching to A steady DC and a 3PDT toggle for the other changes in the audio path and the clock cap. I ended up replacing the blend switch with a full wet/dry blend pot and added a...
by nelson
07 Apr 2012, 01:49
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

This thing is a bitch to route. Just a friendly suggestion 8) You really do not need all that real estate for the 2P4T rotary switch. You can pick up GND anywhere and you only need 3 connection points for the contacts. You could probably buy yourself quite a bit more space if you don't incorporate ...
by nelson
06 Apr 2012, 16:54
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

This thing is a bitch to route.
by nelson
05 Apr 2012, 19:09
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

GodSaveMetal wrote:
nelson wrote:Not allowed to edit posts?

Anyway, ignore previous schematic. Biasing for MN3007 wrong.

Here.
GREAT Mr. Nelson !! IS THE IC10 AND IC11 MN3007??? thank a lot!!!!!

Nah, they're a Reticon R5101.
by nelson
05 Apr 2012, 16:24
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Not allowed to edit posts?

Anyway, ignore previous schematic. Biasing for MN3007 wrong.

Here.
by nelson
05 Apr 2012, 16:11
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Here's the MN3007 version schematic.

Bypass + Blend switching still as per original.
by nelson
05 Apr 2012, 14:26
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

OK, After comparing schematics, this is what I have come up with in addition to the changes above: 1) D2 and D5 are 1N4001 diodes. 2) D3 needs to be a 5mm RED DIFFUSED LED. I believe this is crucial for providing the correct Vbb to the SAD chips. 3) C18 is a 1n cap. 4) C24 is a 2.7n cap These are o...
by nelson
05 Apr 2012, 12:50
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Here's a redraw of the schematic. Couple of values I am unsure on. They have question marks next to them. I can't remember how rigorous I was in verifying every component all those years ago. I'd appreciate if people cast their eyes upon it and saw if they could spot any glaring errors that my eyes ...
by nelson
03 Apr 2012, 01:27
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

OK, For the "conversion to MN3007" wankers, again, it's a matter of doing it. No special magic involved. Stop begging for a schem and start studying dammit. A MN3007 can be used in place of a SAD1024. Setback is reversing the supply power from negative to positive ground (easy) and having a double ...
by nelson
03 Apr 2012, 01:20
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

OK, For the "conversion to MN3007" wankers, again, it's a matter of doing it. No special magic involved. Stop begging for a schem and start studying dammit. A MN3007 can be used in place of a SAD1024. Setback is reversing the supply power from negative to positive ground (easy) and having a double ...
by nelson
02 Apr 2012, 15:39
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Thanks Ron! Mind if I put that document on my site? I've had it in mind to update this project for some time. It was actually the pedal that gave me the impetus to pick up this hobby. Since I'm returning to the hobby after a long hiatus. It seems somehow poetic to make this one a priority to work on...
by nelson
02 Apr 2012, 00:37
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

TR1 + 2 are just signal level adjustments for the compander and SAD1024.

The rest you have right.

Analogkid on here has built this from my project file. He might have some tips.

Good luck!
by nelson
01 Apr 2012, 20:15
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Hello, I am Paul Nelson. I did the PDF project years and years ago. So, it's not fresh in my mind. I do know of one person who has built and verified the Layout. The layout comes from my site where there is contact info. http://electroconducive.googlepages.com Hey Paul! Excellent project BTW... the...
by nelson
01 Apr 2012, 14:58
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH Echoflanger [schematic]
Replies: 193
Views: 103236

Re: EH Echoflanger [schematic]

Hello,

I am Paul Nelson. I did the PDF project years and years ago. So, it's not fresh in my mind.

I do know of one person who has built and verified the Layout.

The layout comes from my site where there is contact info.

http://electroconducive.googlepages.com
by nelson
05 Nov 2010, 13:26
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Jen - KPS900 Phase Shifter [schematic]
Replies: 48
Views: 21571

Re: Jen - KPS900 Phase Shifter [schematic]

I made that Schematic. When I got the pedal, there was no IC in place of the 4007. I was drawing it up on the assumption that it was a 4009, or 4049. That's why the schem looks drastically wrong. I still have the pedal, will pop a 4007 in there. If anyone has any requests, feel free to pm. I didn't ...
by nelson
27 Feb 2009, 17:27
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EH - Clone Theory ( versions ) [schematic]
Replies: 48
Views: 33791

Re: EH - Clone Theory ( versions ) [schematic]

Professor SourTone wrote:Sorry, forgot - will attempt this w/e

I'd love to see them too.
by nelson
11 Feb 2009, 23:17
Forum: Boutique Stompboxes dissected...
Topic: Mid-Fi Electronics - Clari(not)
Replies: 212
Views: 61452

Re: Mid-Fi Electronics - Clari(not)

This thread is useless without a schematic.
by nelson
11 Sep 2008, 19:09
Forum: Boutique Stompboxes dissected...
Topic: Bionic Ear - GreedTone (guts)
Replies: 25
Views: 4084

Re: Bionic Ear Greedtone (guts)

That's ridiculously amateur!

It looks almost worse than a Landgraff.