[sdiy] Tube amplifier question

[jhaible at debitel.net]

> When the heaters are off long enough so that the output cap is
> discharged, then they will go into conduction slow again. If the power 
> cycle is fast, the output cap isn't really discharged yet. A large PSU 
> cap actually helps there, by keeping the supply voltage up for some time.
> I can only say, that I have absolutely no problems with transients,
> power cycling it fast or slow doesn't produce any disturbing pops,
> clicks or the like, even at full volume. And thats entirly due to
> the inherent slow-start slow-stop feature of the heating.

That's encouraging!

I guess I'll build it without transformer then - I can always add one
later.

But wait - with a higher phones impedance I will face more energy in the
worst case (given a certain bias current thru the tubes). So I should run
the tubes at a lower current than you did.

JH.

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