I recently requested a manual for the QRO amp that runs a pair of the
subject tetrodes. Response was only after a fresh $50.00 is rcv'd. I
declined. That's a lot of money for a schematic and parts list.
Lane
KM3G
San Diego
----------
> From: km1h @ juno.com <km1h@juno.com>
> To: amps@contesting.com
> Subject: Re: [AMPS] Linear with 4CX800A
To: <amps@contesting.com>
> Date: Saturday, September 06, 1997 3:51 PM
>
>
> On Sat, 6 Sep 97 11:10:02 -0800 Rich Measures <measures@vc.net> writes:
> 1.. Grid current -/- make the bias V adjustable, and set it for
> >virtually zero grid current with max. drive applied. / Using the
> bias V adj.
> >to
> >increase ZSAC results in grid current, and distortion. The best way
> >to increase ZSAC is to increase screen V, as long as you do not exceed
> >the max. rating.
>
> Here we go again! HORSEFEATHERS Rich. Lets get off the theoretical and
> into the living world.
> Use a fixed voltage screen supply and vary the bias for proper idle
> current. It is easy and repeatable AND with modern tubes the IMD will
> still be below the garbage from most riceboxes.
> I am sure I will get grief from a few but the real object here is to
> produce RF with a decent and acceptable level of crud. No one said it has
> to be perfect. Remember GIGO.
> As I mentioned earlier, your first priority should be obtaining Alpha and
> QRO manuals.
>
> GL....Carl KM1H
>
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