On Wed, 27 Aug 1997 11:54:05 -0400 CATALANO_DENIS_E@hq.navsea.navy.mil
writes:
> Greetings,
> I've been reading the amp reflector for about a year now, and
>
> learning a lot. Now I have a problem that I need help with.
>
> My 422 TenTec Centurion has worked fine for several years. I
>haven't
> used it all summer, but decided to turn it on last night. As
>soon
> as I turned the power switch on, both primary line fuses blew
>along
> with the circuit breaker. No smoke, and no visible damage after
> inspecting it inside and out. I took a reading across the 220V
>line
> cord (unpluged of course) with the fuses replace and read 6.6
>ohms. Is
> this normal? Any ideas? The only thing I did before applying
>power
> was switching the standby switch from operate to standby.
> TNX, Denis, W4DC
Well IMO life does not revolve around parasitics.
In your case I would start thinking about crispy critters across the AC
or HV and/or a moisture induced problem from non use.
Unplug the tubes and try again, preferably with a variac or by rewiring
for 240 but plugging into a 120V line.
Carefully look for carbon tracks on all HV components to ground.
Im not saying that a parasitic could not be the cause but I would
eliminate all of the more common faults first.
73....Carl KM1H
>
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>
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