[ARC5] My R-20/ARC-5

[WA5CAB at cs.com]

Gordon,

The 4-digit numbers stamped on the back of the receivers and transmitters 
are the A.R.C. model numbers of the sets.  The RAV manual I have lists A.R.C. 
numbers as well as Navy Type Numbers for the major components, and 5005, 
5006 and 5007 are their numbers for the 1.5-3.0, 3.0-6.0 and 6.0-9.1 MC 
receivers, respectively.  This and the RAT/RAT-1 manual also says that the serial 
number should be stamped on the back, matching the one metal stamped on the 
nameplate on the outer shield, as they call it.  But I don't recall ever 
seeing one so stamped.  Cost of rubber stamps probably got excessive.

The RAT/RAT-1. ARA/ATA and AN/ARC-5 manuals that I have don't give the 
A.R.C. numbers for the major components, only for the piece parts.

I've no idea how many of the early AN/ARC-5 marked receivers were built, 
but I've never seen one so probably not many.

What is the 2nd IF tube in the R-20/21/22?

Although I have never seen any of the early AN/ARC-5 receivers or 
transmitters, dim memory says they were to have been ARA-1 and ATA-1 but got AN/ARC-5 
nameplates instead.  So the major components may have had (apparently did 
in these three cases) the same A.R.C. model numbers.  Apparently by the time 
that the production AN/ARC-5's were built, they were up to the 9000's for 
mfg. desig. numbers.

In a message dated 10/15/2012 22:43:35 PM Central Daylight Time, 
gewhite at crosslink.net writes: 
>     How many R-20/ARC-5 (1.5 - 3 mc), R-21 (3-6 mc) and R-22 (6-9.1 
> mc) receivers are out there?   I have one of each and there are no 
> serial numbers stamped on them.
> 
>      The numbers stamped on the back are, in order, 5005, 5006 and 5007, 
> which are not the same numbers as on the R-25, R-26 and R-27. R-27, for 
> example has 9606 stamped on the back.
> 
>   - Gordon White
> 

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