[Phread]

"Bret Ludwig" wrote in message oups.com...
On Oct 2, 4:02 pm, "dre7" wrote:
Hey RATs:

Can anyone recall a "classic" commercially made amp that used a choke input?
Not a guitar amp, but hifi. Been sifting through schematics but haven't
happened upon one yet.

Andrew

You mean a choke first POWER SUPPLY? No, none.

None of any size, guitar or hi-fi. Some early Hammond amps, in
Hammond tone cabs I think.

RCA used a half-choke-input supply on the famous design using
regulated screen operation of two 7027s in lots of RC manuals and the
HF-110 pamphlet. Not a produced design. But a virtuoso effort that
beat Mc numbers (but probably at higher AC power and tube consumption)
with off the shelf parts.

What do you mean by "half choke input", Bret? The RCA supply has an 8 henry
choke after the rectifier followed by 20uf feeding the output tranny.

Fred