Mr Steve Bench and his parallel valves...

[IslandPink]

Bass Paul, bass...

Mark

[Andrew]

Originally Posted by Paul Barker

Yes i was discussing in context of original post, output stage.

Perhaps I misled everyone by talking about the 2A3 experiments. I did mean input stages tho' obviously all cases are of interest, but I obviously didn't explain myself well enough.

I believe Steve's experiments were with a 12AX7/ECC83 and the example in question that he uses the parallel valves is his RIAA 5. I should have said....

humbly,

-- Andrew

[Greg.]

Yes Mark, I also hate Bass being spelt Base. We are after all on the right side of the pond.

[Paul Barker]

Sorry.

[lt_texan]

Originally Posted by Greg.

Yes Mark, I also hate Bass being spelt Base. We are after all on the right side of the pond.

the left side spells it "bass" too

[Richard Higgins]

Isn't base the bottom end of the speaker?

Sorry, attempt at a joke.

Regards Richard Higgins

[Richard]

Base would be more logical but bass it is. All a bit fishy really. Perhaps the old English bafs would look more musical

[IslandPink]

There is a danger with all this bass, of it getting a little fishy, but I really don't want to go there .

Regarding Steve Bench's RIAA 5 , does that have paralleled sections anywhere ? if so, ask Dave Dove, he's using that at the moment and has been very pleased with it . Seems to be sometime used at the front end of a phono, to get extra transconductance .

2A3 amp is a little complicated - one of the reasons it works ( in some people's experience ) better with one valve per ch is because the mains transformer and PS are inadequate to run the 4 2A3's , so with just two , the dynamics improve . This does, as Greg points out, depend on whether you can get away with just 3 WPC ..

Mark

[Andrew]

Originally Posted by IslandPink

Regarding Steve Bench's RIAA 5 , does that have paralleled sections anywhere ? Mark

Yes, on the first stage, a parallel 6072A/12AY7 per channel.

cheers,

-- Andrew