Echoplex question

[GBlekas]

Hi,

I have ran across an Echoplex EP-3 that seems to have an extra pcb in it.
The schematics that I have found on the web do not include this extra board.
Here is the picture of the unit.



I got to AB this to three other EP-3's and personally like the sound of this one the best. My best guess and initial impression is that it is some sort of record preamp.

Anybody have a clue or a schematic for this one?

The pcb appears to be original and matches the others perfectly.

I emailed Mike Battle but didn't get a reply.

Thank you,
George

[Regis]

That looks like the compressor board they added to the EP-4 and I guess some EP-3's. Generally speaking it are not well regarded , and even in the manual it is recommended that it be removed. I've attached the page from the manual instructing how to do so.

[Regis]

By the way, check out my echoplex page.

[GBlekas]

Amazing Regis! Thank you so much for the info here!

I checked out your site and find it informative and valuable to many players.

If you don't mind I would like to add a link to your site on my site, which is PedalworX.com, because there really are not many repair facilities available for the Echoplex units. I think this is a good thing and wish you all the best.


Regards,
George

[Regis]

Sure George, go ahead. Just remember I am not an expert on the Echoplex, I just play one on the internet.

I've been putting off plans to upgrade that page, I guess I'd better get off my ass and do it.

regis