On May 31, 2006, at 5:12 PM, Vic K2VCO wrote:
> R L Measures wrote:
>> In an HF amplifier, the old ARRL Handbook test tests HF
>> stability, not VHF stability.
>
> 1958 Handbook, chapter 6 (HF Transmitters) p. 164: Subsection
> entitled "VHF Parasitic Oscillation" specifically addresses this.
> It's too much to type and I don't have a scanner, but it describes
> how to check for VHF parasitics, how to determine the frequency,
> and how to suppress them.
Does this involve keying the amplifier with zero drive, and tuning
the Tune-C and Load-C throughout their ranges?
>
> This appears in a section called "Stabilizing Amplifiers", which
> separately discusses LF, HF and VHF self-oscillation, causes and
> cures.
> --
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
>
R L MEASURES, AG6K. 805-386-3734
r@somis.org
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