This is the only bypass feedthrough (second item) I can find on SSN that
would be a replacement for the original Sprague unit.
<http://www.surplussales.com/Feedthrus/FTholeMnt4.html>
They are $25 each, but will be operating within spec, (30A,) and have
nice, solid bolt terminations on each end.
I still think that the piece of wire with a 0.1 uF disc ceramic right up
against the wall on the inside would be equally effective. It's only
function is to prevent drive power floating around inside the input
section from leaking back out to the filament transformer, and for the
1.5 - 30 MHz range the disc would be more than adequate.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
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