[Milsurplus] [Boatanchors] BC-348 E-M-P

[jmfranke]

In all cases I have found the capacitors to be free of corrosion and the 
exposed shaft bright and shinny. Examining the hex sleeves, I have typically 
found a single hairline crack running parallel to the shaft axis. Once the 
hex nut loosens, the three prong spring moves the rotor until the plates 
meet and short with the stators.

John  WA4WDL

--------------------------------------------------
From: "John Hutchins" <jphutch60bj at gmail.com>
Sent: Friday, May 13, 2011 8:52 AM
To: <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [Boatanchors] BC-348 E-M-P

> Dennis, Joe
> "After trouble shooting I found that about 5 or 6 of the 30 or so
> alignment APC trimmer caps located in the Ant,RF,Det and Osc boxes had
> shorted. They had slipped on the shaft someway and shorted the plates
> together."
>
> Slipping shaft - I do wonder how the plates could move;  Could it be
> corrosion buildup, pushing the shaft?
> Any how thanks for the detailed analysis,  Something to look for.
>
> Hutch