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.
The Funderberg test:
http://www.somis.org/Goldmeltballs.html
>
> I'm wondering how in the world it could have happened with the power
> switch Off.
>
> Anyone care to speculate on a cause?
>
> Guess it is going to be a low power entry in the Phone Sprint for me
> at his house tonight, ;-)
>
> Thanks in advance for anyone's help/advice
>
> 73
> Jon
> K9JS
>
>
>
>
> ---------------------------------
> Yahoo! for Good
> Click here to donate to the Hurricane Katrina relief effort.
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|