From: Ron Wagner 
Subject: Re: [drakelist] Drake Power supplies


Ron Wagner  made an utterence to the drakelist gang
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The AC3 (at least some) have a nice feature.  The supply has a large power 
resistor which is usually shorted.  But, if you unshort and measure it 
(while the power is off of course), you can then use ohms law to calculate 
and set the idle current.  My meter on my TR3 really did not do it for 
setting the idle current.  OTOH, that resistor and a voltmeter did a 
really nice job.

But as Gary states, the AC3 and AC4 are basically identical and 
interchangeable with all the tube TX.  Just need to adjust the bias.

73,
Ron

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Visit my astronomy home page.   http://www.dma.org/~wagner
Amateur Radio Station: WD8SBB - Ron  and  KB8NRP - Joann
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On Sat, 18 Dec 2004, Garey Barrell wrote:

>
> Garey Barrell  made an utterence to the
drakelist gang
> ----------------------------------------------------------------------
> They are essentially identical electrically, and fully interchangeable.
>
> 73, Garey - K4OAH
> Atlanta
>
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