I quit opening the top cover with the amplifier turned on.
The amplifier worked great other than when you wanted open it up. <g>
Terry W6RU
----- Original Message -----
From: Michael Tope <W4EF@pacbell.net>
To: Joe Subich, W8IK <w8ik@arrl.net>; 'Terry Gaiser - W6RU'
<w6ru@lightspeed.net>
Cc: <amps@contesting.com>
Sent: Monday, March 06, 2000 8:26 AM
Subject: RE: [AMPS] RE: Poor Science
> Terry,
>
> I am dying to know the answer to the obvious question, after the second
> "big-bang" how did you proceed. Did you reconfigure the parasitic
> suppressors,
> and if so, did this fix the problem? Did you decide to stop feeding the
> amplifier new 3-500Z and just give-up? Or was there another fix?
>
> Thanks,
>
> Mike, W4EF............
>
> ----------
> From: Terry Gaiser - W6RU[SMTP:w6ru@lightspeed.net]
> Sent: Monday, March 06, 2000 2:07 AM
> To: Joe Subich, W8IK
> Cc: amps@contesting.com
> Subject: Re: [AMPS] RE: Poor Science
>
> <<File: ATT00000.htm>>
> Joe,
>
> The amplifier WAS operating in it's normal configuration ... in fact it
was
> in standby ... no idling plate current indicated on the plate meter. When
I
> raised the lid nothing shorted !
>
> Since this is what caused the "go-bump" as you put it I have to wonder
what
> other sort of little things could cause a similar occurrence. You tell me
> what caused the 3-500Z's to come apart inside and short.
>
> TNX,
> Terry W6RU
>
> ----- Original Message -----
> From: Joe Subich, W8IK
> To: Terry Gaiser - W6RU
> Cc: amps@contesting.com
> Sent: Sunday, March 05, 2000 9:39 PM
> Subject: [AMPS] RE: Poor Science
>
>
> It may well have been an oscillation but it might have been something
> else that caused the tube to bias on in saturation. In any case, one
> cannot call it a "parasitic" event since the amplifier was not operating
> in its normal configuration.
>
> Whether you "mistuned" the system or created a short somewhere by
> lifting the lid is not really germane to the issue of tubes that "go
> bump" while cut-off in standby.
> 73,
> ... Joe Subich, W8IK/4
> <W8IK@Subich.com>
> <www.qsl.net/W8IK>
>
>
> -----Original Message-----
> From: Terry Gaiser - W6RU [mailto:w6ru@lightspeed.net].
>
> So Joe, you think it was an oscillation? ... sounds like it to me
also.
>
>
>
>
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|