Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Effects => Topic started by: antieatingactivist on December 19, 2009, 04:03:23 pm

Title: Old 3 knob memory man help/schematic
Post by: antieatingactivist on December 19, 2009, 04:03:23 pm: I just got a really neat memory man for cheap. The only problem is that the delay knob isn't working. The only schematic that I can find on the internet is for a later deluxe model. Nothing seems to compare to the schematic in the delay pot area.

I haven't even gotten a chance to test the pot yet, but being that the pedal works just fine except for the speed doesn't change, im thinking it is something else. Electrolytic cap maybe? Should I go ahead and replace them all while I'm at it? does anyone have the schematic for a EH1338A?

I've always wanted an analog delay, but not for 300 bucks, and my boss dd20 doesn't really do it for me. Any help will be appreaciated.
Title: Re: Old 3 knob memory man help/schematic
Post by: antieatingactivist on January 08, 2010, 06:55:15 pm: I changed the Vibrator chip and the op-amp that is situated underneath the delay pot. No change. Could somebody give me some insight what might make 4047 chip not change speed?
Title: Re: Old 3 knob memory man help/schematic
Post by: Steve_P on February 06, 2010, 12:10:26 pm: You might check with Ron Neely. He's fixed a couple of things for me, although he's concentrating on his own line of effects. Nice guy!

http://electroharmonix.ronsound.com/
Title: Re: Old 3 knob memory man help/schematic
Post by: duke of earl on February 06, 2010, 07:34:30 pm: I played through one of those one time and thought it sucked a lot of tone and was noisy. I bought a Carl Martin DeLayla that blows it out of the water.
Title: Re: Old 3 knob memory man help/schematic
Post by: tubesornothing on February 06, 2010, 07:58:23 pm: Well to each his own. Anyways, back to the problem at hand.

If not Ron Neely, post it on http://www.diystompboxes.com or http://board.buildyourownclone.com those guys should be able to help out.