[Milsurplus] [ARC5] RAL, RBA, RBC Manuals and info needed

[WA5CAB at cs.com]

Don, et al,

You need to say what the suffix numbers are following the RBA-, RBB- or 
RBC-. The statement in a previous post to the effect that all RBA's, RBB's and 
RBC's are the same is only half right. SOP with the Navy, and only 
ocassionally with the Signal Corps, was to incrament the number on the end of the 
alpha-numeric nomenclature whenever they placed an additional order or whenever 
the prime contractor was different. And to make matters worse, The LM is a 
well known example, having 22 different Model Numbers with only a few actual 
equipment changes. The TCS is the worst, having 16 model numbers with only 
two actual hardware changes (or three if you count the fact that TCS through 
most TCS-4 had no nameplates). Anyway, what you have to do is either get a 
manual where the model number matches the nameplate on your set. Or check 
for a suffix letter to the Navy Type Number assigned to the actual piece of 
hardware. If the Navy Type Number matches that shown in the manual, then any 
manual showing that exact NTN will work. Except with the RBA, you also have 
to check for Field Changes. And with the RBB/RBC-5/6 manual, you definitely 
need Change 1

The same thing generally applies to the RAK/RAL but I'm not as familiar 
with them.

One rule of thumb that does apply to the RBA, RBB and RBC is that the odd 
suffix number models are bench mount and the even ones rack mount (<BLANK> 
being an even number). Which is why each of the NAVSHIPS manuals except for 
the first one covers two model numbers, one bench and one rack.

Figuring out what you need isn't helped any by RCA's practice of using 
photographs of earlier model sets in later manuals.

Replacing the Navy Type Concentric Connector with an SO-239 (which the Navy 
did not do, they would have used Type-N) may not be as easy as saying it. 
The chassis mount NT is rather large compared to the SO-239 and you are well 
advised to use a drill press large enough to put the entire receiver under 
if you are going to do it.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480


In a message dated 05/24/2016 15:14:34 PM Central Daylight Time, 
arc5 at mailman.qth.net writes: 
> Headline says it all I guess. I need manuals and info on the RBA, RBC and 
> RAL receivers.
> 
> 
> Quick question: It seems like the RBA/RBB/RBC power supplies have 2 
> receiver outlets. Can one supply safely run 2 receivers simultaneously?
> 
> 
> Also, what is that weird antenna connector called? Is that a General Radio 
> connector?
> 
> 
> 73 Don Merz N3RHT
> 
> 
> 
> 
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