Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: thebard on February 22, 2021, 01:06:25 pm

Title: Single Input 5f6a Questions.
Post by: thebard on February 22, 2021, 01:06:25 pm

Hi, I haven't started building my amp, still on a planning stage. I have a few Mod ideas I wish to have in the amp and the first one that's really important for me is this:

Having only one Guitar Input that can be switchable to Hi Low and also having Normal and Bright Channels + Normal and Bright (internal jumpering). I'm not that experienced in electronics so I haven't been able to figure this one out. Is this possible?

Also, other mods I want is a MV, maybe Type 2 and an FX Loop.

Title: Re: Single Input 5f6a Questions.
Post by: jordan86 on February 22, 2021, 01:46:04 pm

There are much smarter minds on here but, I think switching would need to be the way to go. One input. One switch for high low that engages disengages different grid leak resistors. Then a three way switch for the channels. One to normal, one to bright, and one to both in parallel. I don’t think there’s a way to sum or break them without a switch. You could much more easily sum(jumper) them at the tube socket but then they would both be always on. Need a switch if you want to separate them.

Title: Re: Single Input 5f6a Questions.
Post by: sluckey on February 22, 2021, 03:23:21 pm

...

Title: Re: Single Input 5f6a Questions.
Post by: CascoSieg on February 22, 2021, 07:07:08 pm

I'm quite happy with the Frondelli inspired MV I put on my recently built 5F6A. Lots of info and layouts for it out there.

Title: Re: Single Input 5f6a Questions.
Post by: thebard on February 23, 2021, 01:37:32 am

thank you very much sluckey! been trying to do it for like 2 days hahahah, i'll keep you guys updated with my planning of the amp, and i'll check for the Frondelli MV Casco!

Thanks again!