R.Measures wrote:
> On Sep 17, 2005, at 1:50 PM, jon s wrote:
>
>
>>I am relaying this for my Father (AI9U) who does not subscribe
>>
>>Last night he was back at his station after a 10 day period of non-use
>>
>>FT920/Alpha 87A/3 ele Steppir/40_80 Dipole
>>
>>With the Amplifier Off - but still in line he was using the tuner to
>>match the dipole, when an "incredible bang" (his words) occured in the
>>amplifier, tripping the 220V breaker. Upon reseting the breaker, the
>>Alpha powered up but would not do much else
>>
>>Anyone ever have something like this happen?
>
>
> Hello, Jon -- Around 40% of the owners I surveyed reported inexplicable
> sudden events that required factory service to correct. When Dick.
> WØID was a participant on AMPS. he told me he had seen over 150 tubes
> at the Alpha factory that had gold-sputtering damage. Perhaps one of
> the tubes has this malady. The Funderberg (W6IHA) test for
> gold-sputtering is non-destructive and simple to perform - provided one
> has a hi-pot tester. If you do not have a hi-pot, I volunteer to test
> the tubes for you - gratis - in the interest of amplifier science.
If I understand the orginal poster correctly, the amp made the
"incredible bang" when it was "Off". That I take as meaning the power
switch was in the Off position.
Perhaps I misunderstood the meaning of "Amplifier Off - but still in
line he was using the tuner to match the dipole". But if the power was
really "Off", there could have been no HT present.
What "Off" means exactly needs some clarification.
--
David Kirkby,
G8WRB
Please check out http://www.g8wrb.org/
of if you live in Essex http://www.southminster-branch-line.org.uk/
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