Seeing as how a Champ is class A to begin with, why should
it "sag" when driven hard? The power tube is going to be drawing
the same amount of current whether the output is zero or full power,
right?

LV




Fabio Berutti wrote:

Dear fellow Rodents,

a friend of mine, who's a very keen jazz guitar player, asked me to make him
a small amp for home practice and/or small gigs. He plays a hollow-body
Ibanez Joe Pass (definitely not a HM axe) and wants a clean, nearly acoustic
tone. I found the schematics of the Fender Champ on the net, and I thought
it's just OK: SE class A pentode, say 5W out of a single 6V6, basic tone
controls, 3 tubes and that's all. But the PS ... well, it seems really
wimp. These days it would be difficult to find such small caps (8 uF). I
have a 40+20+20 can cap available and a small 5H choke, so I planned to make
a CLC filter (5Y3-20uF-5H-40uF-out to 6V6) instead of the original 8 uF C
filter.
The operating point will be exactly the same, DC is DC, and all the rest of
the circuitry and components will be exactly as the original (or just plain
originals as the OPT). The difference is just that the PS will not "sag"
when overloaded.
Do You think this could give a "bad" sound, from a guitar player viewpoint?

Thanks to all

Fabio