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Re: [Amps] R. MEASURES PRAYERS ANSWERED

To: Vic K2VCO <vic@rakefet.com>
Subject: Re: [Amps] R. MEASURES PRAYERS ANSWERED
From: R L Measures <r@somis.org>
Date: Wed, 31 May 2006 17:23:44 -0700
List-post: <mailto:amps@contesting.com>
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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