Subject: RE: [AMPS] Blown TL922A... What to do?
Date sent: Sun, 10 Sep 2000 13:00:01 -0700
From: measures <2@vc.net>
To: "AMPS" <amps@contesting.com>
> Using such software, it was determined that the 8877 is likely to be able
> to oscillate above 100MHz. In my opinion, corrective measures are
> indicated.
The self-neutralizing frequency of an 8877 with properly grounded
grid is several hundred MHz. I suppose the tube might be "likely" to
oscillate up there if conditions are right.
> The intermittent nature of VHF parasites makes this difficult at best.
What makes a parasitic "intermittent"? The stage either has
enough regenerative feedback, or it does not. All you have to do is
duplicate the feedback conditions, and you will have a repeatable
oscillation.
73, Tom W8JI
w8ji@contesting.com
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