[AMPS] Triode Amp Out/In isolation

[Tom Rauch]

> Date:          Wed, 27 May 1998 21:08:33 -0700
> From:          Shawn Tayler <stayler@powernet.net>
> Subject:       [AMPS] Triode Amp Out/In isolation
> To:            Amps <amps@contesting.com>
> Reply-to:      Shawn Tayler <stayler@powernet.net>

> Hi,
> 
> Doing some teswting on my 8938 Stripline (K1FO) design amplifier and found the output to input isolation (at 
> tuned frequency to be 14dB.  This is about the operational gain of the amp.  The isolation is over 50dB andf 
> even exceeds 80dBat all other freqs from 100Khz to 1Ghz.  Is this an ok figure for a GG triode amp?  Its always 
> been stable during normal use, never a snap, crackle, or pop...

Oscillations sometimes do, but much more often don't, cause a snap, 
crackle or pop.

How did you measure the S12 or S21?


73, Tom W8JI
w8ji.tom@MCIONE.com

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