[BC] am receiver for monitoring at a 20 KW site (add)

[seibold at trainride.com]

I should add that both the R-390A and HRO were revered intercept receivers; there were thousands of HROs in WW II intercept service "digging out the weak ones" with less than half the tubes and a tenth of the mechanical complexity of the R-390A.
 
Fred W9FWS
 
-----Original Message-----
From: seibold at trainride.com

A working-well R-390A would be a lot more expensive to buy and much harder to maintain than a National HRO with the right coil set for the freq.

73

Fred Seibold W9FWS
First 'Phone back when there was one......

-----Original Message-----
From: "Mark Humphrey" <mark3xy at gmail.com>

Now, I wonder how an R-390A would work in this situation... You would
need to keep it fed with 220 watts (about $25/month in energy) and
replace tubes from time to time, but I'll bet it would do the job.