[Boatanchors] B&W 5100 Question

Mon, 25 Feb 2002 07:09:05 -0500 (EST)

Hey Mark - beleive it or not my 5100 had the exact same
exciter control short situation. It ruined a pair of 5R4's
(cement bubbled out onto chassis, filaments opened up*)
but the transformers survived.  A dark regulator indicates
NO current, as in the voltage dropping below 150.

* That was a PREVIOUS ownder - looks like someone threw it
into transmit and went out for a beer.

	Chuck
	kb4new
	[email protected]

On Sun, 24 Feb 2002, Mark Bell wrote:

>
> I finally got a chance to power it up today.  Hmmm.  Not good.
> It appears the "Exciter Control" capacitor shorts when it's not
> fully meshed.   Worse,  when that happens, nasty metalic sounds
> come from the environs of the power tranny -- I'm concerned there
> is shorting to the case.  Obviously, power is low, and I immediately
> killed the HV when this happened.
>
> The OC3 VR tube goes completely dark when I turn the HV on.
> Is this typical for an OC 3?   I'm wondering if this indicates excessive
> current through the VR tube.