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[AMPS] SB-1000 mods?

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Subject: [AMPS] SB-1000 mods?
From: Ian White, G3SEK" < (Ian White, G3SEK)
Date: Thu, 13 Sep 2001 11:06:38 +0100
2 wrote:
>>>//  Please name and explain some other causes of potentially fatal 
>>>current surges, Mr. White.
>>You appear to have forgotten that this very subject was discussed at
>>some length back in January/February. 
>//  Alzheimers?
Nah... you're just not changing your memory backup batteries often
enough. Or maybe it's parasitic diodes in the I/O ports   :-)

>>Here are a few quotes from the literature.
>>"Although a very high degree of insulation between two electrodes can be
>>obtained... by modern high-vacuum technique, it is nevertheless possible
>>for this insulation to break down spontaneously and completely. This
>>phenomenon is known by various names, such as... the "Rocky Point
>>effect", after the American wireless station, which is one of several at
>>which it has been observed. ...  Time lags [after application of
>>voltage] can vary between a few seconds or minutes to tens, hundreds or
>>even thousands of hours." 
>>Gossling (British GEC), 'The Flash-Arc in High Power Valves', 1932.
>//  What of G.W. Fyler (Sept.,1935) article in the IRE Journal - 
>"Parasites in Transmitters"?  
We all know that parasitic oscillations can be a cause of current surges

My very simple point is that they are just *one* of several possible

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)

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