[Amps] R. MEASURES PRAYERS ANSWERED

[R L Measures]

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 at somis.org