ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

 
Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

different EH Memory Man schem


 
4/23/2005 7:49 PM
Wild Bill
email
different EH Memory Man schem
A friend gave me an old EH Deluxe Memory Man to fix. I went googling for a schematic and what I found doesn't match.  
 
This unit doesn't use MN3005's - it has SAD1024's.  
There's no sign of a 4047 clock chip. There are scads of RC4558 dual op amps.  
 
It uses the pass transistor voltage regulator but not a 2n6111 but rather a 2n6290. This in itself is no big deal - the circuit is regulating ok but to -20 volts instead of -15!  
 
There's no delay or effects at all. The dry signal comes through ok.  
 
The output pins on the opamps are sitting near the -20 volt rail, which I'm guessing is a real bad sign! :(  
 
Any hints or ideas?  
 
---Wild Bill
 
4/24/2005 3:10 AM
puretube
email

you probably find more replies,  
when you repeat your question here.  
http://diystompboxes.com/sboxforum/viewforum.php?f=2
 
   Page 1 of 1