[Milsurplus] GF and RU Relationships

[WA5CAB at cs.com]

I can add a little to this list.

First, the frequency ranges shown in the various RU and GF/RU manuals is 
purely administrative, not design.  Just as the Signal Corps did with for instance 
the BC-191-(*) in SCR-177, 188 and 193, various orders (which for the Navy 
almost always meant a different model suffix number) specified varying plug-in 
tuning units.  The frequency ranges reflected the choice of tuning units 
ordered.

Second, aside from being made by WECo instead of ARC, the RU-18 and -19 
receivers are the same as later production RU-11 and -12.  RU-11 (S/N 1-300) and 
RU-12 (S/N 1-250) used 46048C.  Higher numbers and all RU-18 and -19 use 46048D. 
 RU-5 uses 46048A.  I don't have anything detailing when 46048 went to 46048A 
or which RU models used 46048B.  The receivers used with GF are all 46051 or 
46051A, at least from RU-4A on.

I think that's all that I have to add.  Except that if anyone is doing a 
GF/RU I have plenty of the 80 plugs if you are using the Extension Control Box and 
80 Jumper (3292) if you are not.

In a message dated 3/21/2008 9:30:38 AM Central Standard Time, 
kk5f at earthlink.net writes: 
> The RU/GF is a current topic, so here is a listing of GF transmitters and 
> the RU receivers that were assigned to them, plus the RU models that were not 
> associated with a GF model.  I've also added the designated frequency 
> coverage obtained from manuals that I have.  Information comes from manuals that I 
> hold.  There are a lot of gaps in the frequency coverage, volts, etc.  I would 
> appreciate additions and corrections to the listing.
> 
>   Transmitter          Receiver                      Contract
> Unit  Frequency KC   Unit  Frequency KC       Volts    Date      Mfr+
> 
> --                   RU                        12                CBY
> --                   RU-1                      12                CBY
> GF                   RU-2                      12                CBY
> --                   RU-2A 200-400             12    03-31-37    CBY
> GF-1  6200-7700      RU-3  224-13575           12    02-10-34    CBY
> GF-2                 RU-3A                     12                CBY
> --                   RU-4                      12                CBY
> GF-3  3000-4525,6000-9050      RU-4A  224-13575  12   06-29-35    CBY
> --                   RU-5   195-13575   12   05-16-36   CBY
> GF-4                 RU-5A                     12                CBY
> --                   RU-6                      12                CBY
> GF-5                 RU-7                      12                CBY
> GF-6  2200-4525      RU-8  200-400, 530-5600   12    02-23-38    CBY
> GF-7  2000-9050      RU-9  200-400, 530-9050   12    10-31-38    CBY
> --                   RU-10                     12
> --                   RU-11  195-13575    12   11-22-39   CBY
> --                   RU-12  195-13575    24   11-22-39   CBY
> GF-8                 RU-13                     12
> GF-9                 RU-14                     24
> GF-10 3000-9050      RU-15 200-395,530-9050   12    12-21-39   CBY
> GF-11 2000-9050*     RU-16 195-13575           12    04-21-41    CW
> GF-12 2000-9050*     RU-17 195-13575           24    04-21-41    CW
> --                   RU-18 195-13575           12    04-21-41    CW
> --                   RU-19 195-13575           24    04-21-41    CW
> 
> + Manufacturer:  CBY=Aircraft Radio Corporation   CW=Western Electric
> * Early issue GF-11/12 frequency coverage was 3000-4525 and 6000-9025
> 

Robert & Susan Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)
   
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