Melting finals

[mike bryce]

oh boy!

well screwed that one up.  re-read the original message. I had first read it
to say sb102 NOT the sb220..

this getting old is a killer..

but the solution is the same. lost of bias or problem with the tuned
circuits on the output

Mike Bryce WB8VGE
SunLight Energy Systems

http://www.seslogic.com
http://www.theheathkitshop.com

"Electricity at the speed of light"

> From: mike bryce <prosolar at sssnet.com>
> Reply-To: mike bryce <prosolar at sssnet.com>
> Date: Sun, 16 Dec 2001 15:41:12 -0500
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: Melting finals
>
> tom...
>
> you did not say if you were just sitting there watching your toes grow or
> working the 10 meter contest..
>
> if you were just sitting there, then you lost the bias voltage. first place
> to look is the output of the hp23 supply. if it is there, then one or more
> dropping resistors are no longer with us.
>
> on the other hand, if the tubes turned red turning transmit, then the
> problem is on the pi network. the final is not tuned... could be a lot of
> things from no antenna to the wrong antenna. a shorted band switch or a
> fault in the pi network output coils.
>
> that large pi network output coil does not change in value, but it has been
> know to develop a short when the wires rub off their insulation.
>
>
>
>
> Mike Bryce WB8VGE
> SunLight Energy Systems
>
> http://www.seslogic.com
> http://www.theheathkitshop.com
>
> "Electricity at the speed of light"
>
>> From: Thomas Beltran <tbeltran at EARTHLINK.NET>
>> Reply-To: Thomas Beltran <tbeltran at EARTHLINK.NET>
>> Date: Sun, 16 Dec 2001 11:32:29 -0800
>> To: HEATH at LISTSERV.TEMPE.GOV
>> Subject: Melting finals
>>
>> Last night, the finals on my SB-220 began to glow red.  I turned it off and
>> let it cool down.  Has anyone had that experience?  Tom W6EIJ
>>
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