ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. The sunn still shines online!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

2 QUESTIONS...

6/18/2000 6:38 AM
Johnathan Foy
2 QUESTIONS...
hey first of all i was wondering what everyone would recommend as an opamp for this 3 band tone control:  
 
http://www.montagar.com/~patj/3btone.gif ?!  
 
second of all, before i "go crazy" and make a pcb for the Doctor Q on jd's site, on the parts layout for it, on the far left side it shows a 3 lug trimmer or pot, now it shows 25k and then before that to the right there is like a 22k (i think) resistor...now radio shack DID NOT have any 25k trimmers, but i did get some 47k's...can i just double up the resistance on that 22k resistor to say like a 40 something k resistor and then use the 47 k trimmer?  
 
if i'm wrong about this feel free to correct me...oh, and i LOVE those rub on pcb transfers from radio shack! :)  
 
thanx!  
 
Johnathan  
 
ps~does aron's info on trimmers explain which lugs are which on the pcb mount trimmers?! the ones i got are horizontal mount, if that matters, but i wouldn't think it should.

 
Replies:
Eric H q{hey first of all i was wondering ... -- 6/18/2000 8:59 AM
Pete Johnathan,Any low l... -- 6/19/2000 12:15 AM