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Re: VTTC grid leak
Original poster: "robert heidlebaugh" <rheidlebaugh-at-desertgate-dot-com>
When using a directly heated cathode tube you use a center tapped fill
transformer and put the cathode resistor in the center tap lead so fill
current dose not flow in the resistor.
Robert H
--
> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 04 Sep 2004 09:30:35 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: VTTC grid leak
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 4 Sep 2004 09:32:45 -0600
>
> Original poster: herwig.roscher-at-gmx.de
>
>
> Bob (R.A.) Jones <a1accounting-at-bellsouth-dot-net> wrote:
>
>>> Unfortunately the cathode of the 4-125A is heated directly i.e.
> the
>>> filament current of 6.5 A ac would flow through the resistor as
>>> well.
>> Not if you put it in the ht return connection.
>
> Bob and Steve,
>
> This I meant with: "I will try to monitor the plate current instead."
>
>> For instance, the place where the negative lead of your HV supply
>> connects to the cathode circuit. (this is often the centre tap of
>> the filament transformer)
>
> Unfortunately the xformer has not CT.
>
> Cheers,
>
> Herwig
>
>
>
>
>
> ---------------------------------------
> Greed is the root of all evil!
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>