[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

More information about the AMRadio mailing list

This page last updated 20 Feb 2018.