[AMPS] Parasitic suppressors/another question,

[Richard W. Ehrhorn]

-----Original Message-----
From:	Rich Measures [SMTP:measures@vc.net]
Sent:	Saturday, April 10, 1999 2:56 AM
To:	'amps@contesting.com' 	
Subject:	RE: [AMPS] Parasitic suppressors/another question,


>?  Adjusting C-tune makes little difference in the anode resonance since
>C-tune is effectively in series with C-anode, which is much smaller.
>
> >[Richard W. Ehrhorn]  <<< A sweeping generalization which is not 
> >necessarily true. In many cases - such as big tetrodes tuned by vacuum 
>>variables - Tune Cmin may be considerably smaller than tube Cout... right?
>
> ?  Surely.  The 8973 has 160pF of C-anode.  At 29.5MHz, C-tune would 
probably be around 100pF.    However, in a SB-220 the measured anode 
resonant freq. changes little between 80m and 10m operation.  

But one example does not a universe make.

73,  Dick 

Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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