[Amps] Parasitic suppressor resistor

Bill Turner dezrat1242 at ispwest.com
Mon Jan 2 13:46:10 EST 2006


ORIGINAL MESSAGE:

At 10:19 AM 1/2/2006, Steve Thompson wrote:
>I can't help but think that a low inductance Xc=5-10 ohms from cathode
>to ground would make a big difference to the calculation. Cutting the
>loop gain by 7-10dB is a good recipe for better stability.
>
>Steve


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I wonder about this too. In my amp, I have a low-Q parallel resonant 
tank circuit on each band from cathode to ground. Q of about 2-3. I 
would think this would greatly reduce the tendency to oscillate at 
VHf compared to an untuned input.

Comments?

73, Bill W6WRT



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