Re: LF: Valve LF amps and tank coil size / voltage rating?

[DK7FC <selberdenken@posteo.de>]

Hi Chris,

Am 14.11.2015 21:00, schrieb Chris Wilson:
> OK, but what about wire breakdown voltages? In all the big air cored
> LF tanks I have seen the windings are well spaced on ceramic, or
> Paxolin type grooved formers, how do I know a close wound toroidal
> coil won't break down?
>
>
> I have built a few HV supplies using decent industrial quality iron
> cored transformers, the biggest is 5kV at 1.5 Amps, which can also be
> fed from a 40 Amp Variac, to drop the primary down.
Very well, i see you are thinking in the right dimensions! :-)

> I do have a reasonable collection of failed FET's though :) In
> fairness user error was the demise of most of them.
>    
LOL!
I never built a tube PA so far. But it is time!
> > I'll say it againV = 4.44.F.N.A.B  (all SI units)
> >      
V = 4.44.F.N.A.B = 176.F.N.A.B ?

73, Stefan