dsavitsk

You wouldn't say that if you just had the day I had trying to track down the short(s) in a board.

Shelly has a DAC that was originally built as a one-off complement to one of the acrylic Black Diamonds, but has been subsequently separated from its pair. It uses a WM8741 DAC with DSHA style buffers and 1:1 nickel core output transformers.

Good to hear everyone made it through. Tornados are one part of the midwest I don't miss. Me? I bought a boatload of tubes. And some transformers.

That sounds like pretty classic priming, which is why you need 2 and a blind test.

Trying to get caught up on projects. Next up ...

Happy Birthday!

Happy Birthday!

+1 FTFY

McMaster has it by the foot, too.

Happy Birthday!

Claire +1

Happy Birthday!

Do you have two of them so you can compare a cold and a hot one?

If heat caused it, how about a heat gun to remove it?

Happy Birthday!

This much I am familiar with. And in essence you are basically saying that a CCS has a high impedance that forms a voltage divider with the load with the lion's share of the current going to the lower impedance portion. Were it practical to do so and if we didn't care about efficiency, an amp with a 100KV supply could use a 10M resistor to much the same effect. I guess the question is that in a common cathode triode, the lowish plate impedance drives the plate load in parallel with the load. A pentode is the opposite and has a Zout that is PS's Zout in series with the resistor load with the tube modulating the PS. So I am wondering if that resistor load on the pentode is a reasonable and somewhat unexplored way to drive these things or if your above calculation contains something to suggest otherwise.

Could you comment on the influence of the plate impedance on your calculations. Or specifically, when the output device itself is a constant current source. Several of the triode based amps all have a lowish impedance. But some of them use a cascode of some sort which would produce more pentode/transistor like plate curves with a very high Z. Does it matter?

Very nice build, Kerry!

Japanese cabbage and white bean stew.