[Milsurplus] TCS Tx and RX identity

[WA5CAB at cs.com]

Sorry.  That was a typo.  I meant to write '16 "models"'.

Collins always (usually?) seems to have assigned Collins numbers for 
internal use whether they sold any as the Collins (civilian) number or not.  From 
what I gather from the TCS, TCS-4 and 56Q manuals (all are USN 
Preliminaries) a TCS-(*) consisted of a 56Q, 51Q and several other Collins numbered 
items.  I don't currently have any evidence for when the 5-Digit Navy Type 
Numbers were assigned, but apparently before TCS-5.  In some later cases (ATC and 
AN/ART-13 for example) the military manuals refer to some internal 
assemblies by their Collins numbers.  For example, the two CFI modules and the audio 
module.

Yep.  RU beats out LM.  But both were exceeded by the Signal Corps BC-221.  
27 "models' from BC-221-T1 through BC-221-AN, with several skips.  In the 
cases of the TCS, RU and LM there were only a few actual changes made.  In 
the case of the BC-221, I've never counted up those that count but there were 
between several and many.

In the Navy sets there were several others that reached between 15 and 20. 

In a message dated 11/25/2010 12:10:51 PM Central Standard Time, 
kk5f at earthlink.net writes: 
> Robert wrote:
> 
> >There was a TCS-15, also made by Air King.  So there were a total of 15 
> "models".
> 
> Interesting info, Robert.  Including the TCS(-0) model, wouldn't that mean 
> there
> were 16 total models?  And that would not include any commercial 51Q/56Q 
> versions.
> 
> I always wonder how many of the "commercial" models of various WWII-era 
> Collins military sets were sold for civilian use, in particular the 17H-2 
> (T-47/ART-13) and 51H-3 (R-105/ARR-15) units.  I've got a maintenance manual 
> for the 17H-2, but it is identical to the equivalent military manual for the 
> T-47.  I wonder if there were,
> then, 17H-1 and 51H-2 versions.
> 
> >Which is not a record number.
> 
> I'm guessing the record goes to the RU series from 1930 to 1941:
> 
> RU, RU-1 to -19, plus RU-2a, RU-3a, RU-4a, RU-5a
> 
> All were made by A.R.C., except WECO's RU-16 to -19.  That's a total of 24 
> "models"!  
> 
> Mike / KK5F  
> 

Robert & Susan Downs - Houston
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