Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: pbman1953 on December 08, 2022, 05:22:20 pm

Title: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 08, 2022, 05:22:20 pm

The Super twin has been working fine but I have 1 gain question. At the front end on V1-pin 8 I replaced the 750/3v to a 10 uf. I seemed to have lost some gain and attack. Should I go back to the 750 or change to another value?

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 08, 2022, 05:59:59 pm

yes

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 08, 2022, 06:04:16 pm

ok, thanks

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 06:41:28 am

I still have the original white 750 polarized cap. Should I use it or replace due to its age?

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 09, 2022, 07:17:04 am

yes

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 07:38:36 am

Thanks, just to be sure. This is a 750 uf?

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 09, 2022, 07:46:45 am

Hey, you didn't ask permission to remove it. You don't need permission to put it back.  :wink:

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 07:48:20 am

True, just want to be sure if the value in in"uf"


Thanks!

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 09, 2022, 07:59:14 am

yes

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 08:00:03 am

Thanks!!!

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 09, 2022, 08:02:36 am

You know, that was answered back in August.

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 08:05:50 am

well, your memory is better than mine :icon_biggrin:

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 03:04:37 pm

I've looked at many other bass amp front ends. Traynor and Sunn both use 220uf for that position. Fender has used 25 and 220.


I have a 220 and a 330. Will the 750 be that much different? I'm coming from a 10

Title: Re: Revisit- Fender Super Twin- New Project
Post by: sluckey on December 09, 2022, 03:15:22 pm

Just do it!

Title: Re: Revisit- Fender Super Twin- New Project
Post by: pbman1953 on December 09, 2022, 04:40:03 pm

Well I tried the 220 , 30 & old 750.


The old 750 did have the best attack. I stayed with the 330 because it was close and new. Otherwise I can put the 750 back in