|[AMRadio] R390 rectifiers|
CL in NC via AMRadio
amradio at mailman.qth.net
Mon Jul 7 22:04:44 EDT 2014
In reference to the tube rectifiers in the R390A, I have gone against the grain and replaced them with silicon diodes, along with installing a chassis mount 500 ohm resistor in series with the B+ out. I would have to go look again since it has been years since I did that, but if I remember correctly, B+ was coming out of the PS and running along the harness in the back and I just cut the leads and spliced the resistor in. B+ is manual exact in my RX. One of the Navy mods is replacing the tubes with diodes, so it does have some credibility. It may have been a suggestion and not an official mod though, I know it is somewhere in my collection of R390A info and will probably show up with internet research on the RX.
Charlie, W4MEC in NC
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