[AMPS] Re: YC156 heater/cathode question

[George T. Daughters]

On 8 May 01, at 0:41, Dave Haupt wrote:

> A couple of points here.
> 1)  You can apply HV any time you want.  Just don't
> draw any cathode current during the six minute warmup.
>  In other words, keep the cathode biased negative with
> respect to the grid until after six minutes.

If the cathode is biased negative with respect to the grid, then 
major cathode, grid, and anode current will flow... Better bias the 
cathode positive with respect to the grid!  (Or the grid negative w/r 
the cathode... i.e. cut the tube off.)

73,

George T. Daughters, K6GT

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