[R-390] Digital Readout

[DW Holtmnan]

Hello,

There are several companies that make digital readouts for analog tube 
sets. Such as http://www.aade.com/dfd1.htm. It seems to me that the 
R-390 series is one of the last that need a digital readout. When 
properly aligned as everyone knows it has a very accurate readout. I 
would like to see the modified military version just to know what was 
type of readout was involved.

Working on this series of radios is therapeutic, the most relaxed part 
is my day that I enjoy the most is going out to my shop turning on a 
good shortwave station and puttering around with R-390's.

Best,
DW Holtman
WB7SSN


Rich do you remember if it was a mechanically driven affair?  I am 
assuming not if it didn't require calibrating it must have somehow 
monitored the various frequencies and did the math necessary to be 
accurate...

Sure would like to see one of those....that's something we could 
probably duplicate pretty easily.  You would think there would be 
technical documentation around on it somewhere....

Cecil....