|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
72.49.109.51
In Reply to: RE: Guitar Amp Prototype posted by Triode_Kingdom on December 14, 2014 at 16:08:35
TK,
The 6SL7 is not doing you justice. Having a 100K plate and 100K on the 6SH7 means you only have 50K effective impedance. In my experience putting a 500K pot instead of the 100K grid resistor on the 6SH7 would make a world of change and give you more sonic structure.
You have to watch out for too much gain unless that is the sound you are looking for.
Do the above and it will sound cleaner.
Thanks,
Gordon
J. Gordon Rankin
Follow Ups:
Thanks for pointing that out Gordon. The 100K was left over from a previous test amp built onto this chassis. I had planned to change it before I posted the schematic, but I forgot. It should indeed be 500K. Those are 6SN7s by the way, guess I should have made the fonts a little bigger.
EDIT: I installed a 1M log this evening. That really kicked it up a notch. It's very dynamic, and my Peavey guitar can push the amp into mild distortion at full volume now. Nice improvement!
--------------------------
Buy Chinese. Bury freedom.
TK,
Problem with 1M pots in the beginning of the circuit is you loose top end. My fav circuit now used by a bunch of top artists uses a 6072A and 500K pots at the start.
Thanks,
Gordon
J. Gordon Rankin
"Problem with 1M pots in the beginning of the circuit is you loose top end."
I haven't swept this since I made the change, but I don't see how 1Meg on the grid of a 6SN7 will hurt response. This isn't a high gain (high Miller) triode. Am I missing something?
--------------------------
Buy Chinese. Bury freedom.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: