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Vintage threads from the first ten years

previous: Carl B. Re: Voltage switching: Where do you put the switch? -- 1/20/2000 3:23 PM

EE Q: What about Matchless DC-30 Switching?

1/21/2000 6:03 AM
Todd	EE Q: What about Matchless DC-30 Switching? Boy, that sounds like an awful lot to worry about! I was planning on going cathode-biased, so maybe I'm approaching this the wrong way. Rather than using a PT with two different VAC secondary taps, would it be easier to use a single B+ and use a cathode-to-ground DPDT switch like Matchless DC-30's use? I want to use four 6V6's but have the option of high/low power switching (or half-power switching as some companies call it). If I remember right, the switch ungrounds one pair of push-pull output tubes and gives half power. I have some clues how this works, but can anyone give me an explanation? Thanks Carl and anyone else who responds! TJK

1/21/2000 6:03 AM

Todd

EE Q: What about Matchless DC-30 Switching?

Boy, that sounds like an awful lot to worry
about! I was planning on going cathode-biased,
so maybe I'm approaching this the wrong way.

Rather than using a PT with two different VAC
secondary taps, would it be easier to use a
single B+ and use a cathode-to-ground DPDT
switch like Matchless DC-30's use? I want to
use four 6V6's but have the option of high/low
power switching (or half-power switching as
some companies call it). If I remember right,
the switch ungrounds one pair of push-pull
output tubes and gives half power. I have
some clues how this works, but can anyone
give me an explanation?

Thanks Carl and anyone else who responds!
TJK

Replies:

Steve A. Todd: &n... -- 1/21/2000 7:34 AM