Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ernie_jr on September 23, 2011, 03:06:38 pm

Title: power tube coupling caps
Post by: ernie_jr on September 23, 2011, 03:06:38 pm

Afternoon everyone,
I have seen fender and sunn use 0.1 coupling caps before the power tubes, ampeg use 0.33 and 0.02 in there b25 and b15 amps.
What difference in sound would these make and which is best for a bass amp?
Thanks,
Ernie
.

Title: Re: power tube coupling caps
Post by: FYL on September 23, 2011, 03:22:27 pm

Larger cap => mo' extended low end. But it all depends on the source Z and loading.

You may play with the online calculator devised by Richard Kuehnel :

http://ampbooks.com/home/amplifier-calculators/coupling-capacitor/ (http://ampbooks.com/home/amplifier-calculators/coupling-capacitor/)