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[AMPS] More on the SB220

To: <amps@contesting.com>
Subject: [AMPS] More on the SB220
From: measures@vc.net (Rich Measures)
Date: Thu, 18 Mar 1999 11:12:28 -0800


>
>       >In all the years that I spent working on high power transmitters, I
>have
>       >never witnessed a failure caused by a parasitic when the
>transmitter was
>       >powered but unkeyed. That's why I'm having a hard time accepting
>that the
>>fault was caused by a parasitic. 
>
>
>Could it be that you have a 'flash arc' or 'Rocky Point effect'? Although
>the voltage may be considered low for a glass tube, the effects you describe
>fit the description. A reference is:
>
>The FlashArc in High Power Valves, by B. S. Gossling, Journal IEE, London,
>1932 - don't have the full reference, only a copy of the proof copy.
>
?  Also:  
*Proceedings of the Institute of Radio Engineers*, 
September, 1935.  
"PARASITES AND INSTABILITY IN RADIO TRANSMITTERS"  
by G. W. FYLER, General Electric Company, Schenectady, New York.  

        " ...  Methods of locating and eliminating parasitic circuits are 
discussed"
.........


Rich...

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


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