Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ernie_jr on March 21, 2017, 11:52:24 am

Title: 5f6-a bright channel
Post by: ernie_jr on March 21, 2017, 11:52:24 am

On Fender's schematic for the 5f6-a bright channel there is 100pf cap across the wiper. I dont have any 100pf so would a 250pf cap make much\difference?
Thanks,
Ernie

Title: Re: 5f6-a bright channel
Post by: pompeiisneaks on March 21, 2017, 01:11:31 pm

It will make the 'bright' have a lower frequency response, so not quite so 'high' but you can definitely try it out and see if you like it.  If not order a 100pF and replace it.  It definitely won't hurt anything.

You can lookup the calculations out there for capacitor frequency and figure out for that amp the exact frequency 100pF vs 250pF and see the difference, but hearing it is probably best.

~Phil

Title: Re: 5f6-a bright channel
Post by: ernie_jr on March 21, 2017, 01:23:13 pm

thanks,
Ernie

Title: Re: 5f6-a bright channel
Post by: PRR on March 21, 2017, 09:23:05 pm

Two 250p wired in series is 125p, closer to what Leo picked.