"AKSWL" wrote in message
...
Is there a soild state replacement for the rectifier tube
5U4 in a
HQ-145xc?

Seems I remember such a tube being available for around
$20 from an
internet source.

73

John

Its easy to make a substitute using a couple of high
voltage diodes from Radio Shack and a series resistor to get
the voltage back down. I am not sure of the size of the
resistor but think around 50 ohms, someone here may have a
better value. Nearly any vacuum tube rectifier can be
replaced with this arrangement. The only disadvantage is
that the B+ is applied right away whereas with a tube
rectifier the voltage does not appear until the filiment has
warmed up a little. That gives the other filiments a chance
to come up to temperature. Not a big deal.


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Richard Knoppow
Los Angeles
WB6KBL