[Amps] HV relay

[James Colville]

No. The tube is cut off. No plate current flows when the tube is cut off
(biased off).

And yes it does make things simpler than you were thinking!

You need to find and study schematics of amplifiers on line and in the
handbooks. That's how I learned!

73
Jim W7RY



On Fri, Feb 5, 2010 at 11:38 AM, MIKE DURKIN <patriot121 at msn.com> wrote:

>
> Isnt there current drawn even in standby? Around 1 ma or less.......
>
> If i don't need a relay for HV control and just for Tx inhibit ... then
> this - becomes much (much) more easy.
>
> Mike
> KC7NOA
>
> > From: jim at snip.com
> > To: amps at contesting.com
> > Date: Fri, 5 Feb 2010 09:46:06 -0800
> > Subject: Re: [Amps] HV relay
> >
>  > On Fri, 5 Feb 2010 06:26:23 -0800, MIKE DURKIN wrote:
> >
> > >Im changing my 2 at 3-500Z amp to a single GS-35B and in the spec's
> > >for the tube it states that the warm-up time is Aprox~ 2 minute.
> > >So instead of using  a power SCR in the mains to switch on the HV
> > >bank
> >
> > It's OK to put HV on the tube during the warmup time. What you don't
> > want to do is ask it to draw plate current or generate power. A
> > simple delay circuit that locks out TX is all you need.
> >
> > 73,
> >
> > Jim K9YC
> >
> >
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