[Milsurplus] USN RBM vs. RBS Questions

[Normiehall@aol.com]

I have the RBM setup and it is pretty interesting.  The selectivity of the HF 
set was so wide that I never made serious use of it.  

I am surprised to hear that the schematic is identical to the RBS HF set.  I 
don't have that set but have had experience with it when in the USN 50+ years 
ago.

I was stationed in 3 or the 4 Iowa class battleships during the Korean War 
during their tours there as part of Flag Allowance, Commander Seventh Fleet.  We 
had a couple of RBS receivers in Radio 1 in a compartment to starboard of the 
main Radio 1 compartment.  Memory doesn't serve me as to which one or more of 
the ships had the RBS but I do remember it was not looked on with favor by 
any of us (the radio operators) and was not used except for overload when 
nothing else was available.  I don't remember the engraved knobs but that is most 
likely a lapse on my part.  The RBM/RBS is a nicely laid out, good looking 
receiver and it's a shame it doesn't have better performance.  

On board the BB's, we used RBA, RBB & RBC for all LF, MF & HF work and I 
remember at the time thinking they were not really "hot" receivers compared to my 
general coverage Hallicrafters S-40A at home.  But they sure were stable and 
the audio output limiter and the selectivity made them very well suited for 
copying Fox broadcasts or sitting on a circuit for hours at a time.  (And yes, 
they were rock solid for RTTY use as well.)

73,

Norm Hall, W6JOD  


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