[R-390] R-390 info

[Roy Morgan]

> On May 28, 2019, at 10:01 PM, Ken <kenharpur at startmail.com> wrote:
> 
> Hi everyone,
> 
> I’m glad the list has sprung into life again after a long time being relatively quiet. All this talk of the R-390 is getting me inspired to grab mine out of storage and start work on it.  I too would be very interested in a compendium of knowledge for the R-390.  

R=390/URR (“non-A”) folks,

The two series B+ regulator tubes (6082’s) in these radios make a LOT of heat.  I cobbled up a fan plate to hold a fan onto the outside of the radio to cool the area - it makes a huge difference in the temperature of that section of the radio (and no doubt the underside of the radio too).  It slips onto the existing bottom cover and frame screws for a no-changes addition, except for power connection.

I have a picture with ruler and notes file so you can make one yourself if you want - will send to anyone interested.

Roy

Roy Morgan
K1LKY since 1958
k1lky68 at gmail.com