What's a high voltage glitch resisitor????????
Mike Michon
-----Original Message-----
From: km1h@juno.com <km1h@juno.com>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Thursday, March 18, 1999 10:57 PM
Subject: Re: [AMPS] 3cx1200
>
>
>
>On Thu, 18 Mar 1999 22:53:37 EST KA2YKC@aol.com writes:
>>
>>
>>
>>
>>I was testing a Henry 3k Classic which had been sitting idle for a few
>>years.
>>Amp tuned up fine on 40metrs with the HV in the CW position. In the
>>SSB
>>position, after keying down just long enough to check the Bird meter,
>>the
>>built-in pwr switch/breaker would trip. Output was about 1200w for
>>75w
>>drive. HV was reading 4400v no-load, 4100v key-down, with about 600ma
>>on the
>>plate current. After the breaker was reset, all was fine again in the
>>CW
>>position. When we tried the SSB position again, same thing - tripped
>>pwr
>>breaker switch.
>>
>>Are 3cx1200's known to go gassy from sitting idle for years at a time
>>?
>>
>
>NO. What happens if you just run idle current for say 10 minutes? Any
>change?
>
>>Visually all looks ok inside. Test was into a dummy load. My only
>>guess is
>>that the tube is flashing over, or something is going awry. No damage,
>>just a
>>tripped breaker.
>
>That is not the symptom of a tube arc. Does that amp have a HV glitch
>resistor?
>
>
>>
>>Any comments ?
>
>Sounds like a PS problem, something not exactly unheard of with a Henry
>amp.
>
>Any way you can put a DC load on the HV; minus the tube?
>
>73 Carl KM1H
>
>
>>
>>Thanks
>>Eric
>>KK2ED
>>
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>>
>>
>
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