[R-390] MIcroswitchs? We don't need no stinking microswitches...

[Thomas W Leiper]

On Tue, 30 Jul 2002 09:54:01 -0400 Roy Morgan <roy.morgan@nist.gov>
writes:
...
> I believe that we can help our radios by some improvements:
> 
> 1) Add inrush current limiting
> 2) Add a line voltage bucking transformer...
> 3) Add fans, ESPECIALLY in the R-390 non-A
> 4) Add a line relay that is operated by the microswitch...

Roy, all you really have to do is #2 because you leave
your radios on 24 / 7 anyway...DON'T YOU? So, there
is no (1) inrush or (3) excessive heat or (4) need for
any kind of on/off switch. I buck the whole rack down
12 volts except for the SP-600's, which have the rather
deluxe feature of multiple primary taps. You can also
convert BA rigs that use a 5V rectifier tube to solid state
and use the 5V filament winding to buck the primary
instead...that is a particularly elegant way to cool down
your CV-591 by a few thousand degrees kelvin.

Adm. Charles P. Collingsworth, USN, ret. (deceased)
Hammarlund