Karl -
Yep, those are the Sprague 'HyPass' caps. They are rated for 20A, which
is a little disconcerting, but there seem to be few failures. SSN
doesn't have them any more though.
The current limitation would be the size of the internal conductor, and
the attachment method at each end. I suspect the conductor just runs
warm, which may be what has caused the limited failures. The other
thing of interest would be the voltage drop across it, lowering the
applied filament voltage, which may not be a bad thing!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
Karl Corder wrote:
Found the boxes that the feed through caps came (miracle), anyway
the boxes read Sprague by pass capacitor 80P3 .1 MF 600 WVDC
516 .0693-000 . These were purchased from Surplus Sales of Nebraska
for $18/each. I hope this helps, been using the L4B for six months
and no problem
so far. I have been driving it with a t4x and now a tr4, according to
the meters
it is putting out around 950 watts cw and near 1500 watts ssb. I hope
that helps
as I spent a year repairing this L4B as it had been badly abused. I
received tremendous help for folks on this site, like Garey and Rick
and others.
karl - wa2ovj
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