[GreenKeys] Speaking of Military Teletypes (Teletypewriter Reperforator T...

Tue Dec 5 17:27:37 EST 2017

True enough. In the US Army, things were further complicated becuase most units operated
off of what was called a TDA, MTDA, TOE or MTOE, which stated exactly what equipment
was authorized to be on hand for any given unit, based on it's real world or war time mission.
These were tables of Distribution and Allowances or Tables of Organizational Equipment,
excluding Station Complimentary equipment, accessories and furnishings. 

In most cases, TDA or MTDA (for fixed stations) and TO&E or MTOE (for field, or tactical
units), were pretty cut and dried, but often times, there was overlap. At other times, whatever
was available, or whatever showed up in the supply system is what was used. Other times,
operational necessity (the requisition process) carried the day, which was most of the Army
in wartime.

TDA and MTDA: Tables of Distribution and Allowances or Modified TDA
TOE (or TO&E) and MTOE, Tables of Organizational Equipment, or Modified TOE.
TDA and TOE are "what" were authorized; MTDA or MTOE is what was available
(usually in the form of substitutions, non-standard issues, when the exact equipment
was not available (which was most of the time!)). It cost a lot of money to equip an Army 100%,
so many times, equipment had to be gathered and cobbled together in order to accomplish
an assignment mission).

Dave

# # #

-----Original Message-----
From: WA5CAB--- via GreenKeys <greenkeys at mailman.qth.net>
To: greenkeys <greenkeys at mailman.qth.net>
Sent: Tue, Dec 5, 2017 12:52 am
Subject: Re: [GreenKeys] Speaking of Military Teletypes (Teletypewriter Reperforator T...

Right.  The nomenclature suffix was usually assigned based on the equipment or system that it was first procurred for.  There were no restrictions other than practical against utilizing equipment in other circumstances.  For example AN.ART-13 was used in a Vehicular (actually Mobile) system .AN/PRC-47 was used in a Fixed system.  And both AN/ARC-3 and AN/ARC-27 were used in either Ground or Fixed installations.  Lots of other examples.

In a message dated 12/04/2017 20:05:38 PM Central Standard Time, nnn7dxb at aol.com writes: 

Paul: 

To clarify the "F" part of the equipments JAN nomenclature description.

F simply means that the equipment was classified for use in Fixed Stations,
 specifically, in the case of teletypewriters, military Communications Centers
 or CommCenters.

But, just because it was classified as "fixed station" equipment did not always
 mean that it was used that way exclusively.

Many pieces of fixed station equipment in the US Army ended up in tactical
 and transportable vans or vehicular assemblages. Likewise, many times, a
 piece, or several pieces of "fixed station" equipment wound up in tactical
 units that did not move very often. Such units were more of less "fixed tactical",
 or tactical units performing a fixed station function either in a hardend shelter,
 building or transportable communications van.

Case in point, AN/TGC-5 tape relay equipment was used by the 7th Special
 Forces Group to operate a Theater Level Major Tape Relay which was a semi-fixed 
 facility (UUMS). The unit was "tactical", but the equipment and facility were "fixed" 
 (did not move). This equipment was not easily deployable, nor was it easily
 disassembled or reassembled once set up.

14th Armored Cavalry Regiment in Germany operated AN/FGC-25X teletype
 gear. Tactical Armored unit (all M-60) tanks), but HQ (HHC) station operated a fixed CommCenter
 that did not move. For tactical use, they had AN/MSC-29 CommCenter vans which
 used TT-4 and TT-76s and AN/GRC-26Ds (TT-98s and TT-76s) (1960s).

Dave

# # #

-----Original Message-----
From: WA5CAB--- via GreenKeys <greenkeys at mailman.qth.net>
To: pbirkel <pbirkel at gmail.com>; greenkeys <greenkeys at mailman.qth.net>
Sent: Mon, Nov 27, 2017 10:24 pm
Subject: Re: [GreenKeys] Speaking of Military Teletypes (Teletypewriter Reperforator T...

Paul,

To take your last question first, no.  Field Grade is, if I recall correctly, Major through Colonel.  It has nothing to do with equipment.  F means "Fixed" and "G" means Telegraph or Teletype.  See "AN Nomenclature System", "JAN" or "Joint Army Navy" or similar.  Although I think it has been abandoned for the most part, it applies to electronic and some electrical equipment including most mechanical parts thereof, and dates from late 1942 or early 1943.

I think the QTH.Net server will strip it off but in the direct, see the attached PDF from 1959.  I have a later one but don't have time right now to convert it to PDF.

I suspect that maintenance on the TT-107 et al is covered in some manual on some AN/TGC-xxx set which I don't have time right now to try to track down.  The two parts manuals are the only entries that I see under TM 11-5815-257-nn.  If I turn up anything else, I'll post it.

In a message dated 11/27/2017 02:09:12 AM Central Standard Time, pbirkel at gmail.com writes: 

This one is actually a Kleinschmidt, but I’ve had no luck finding any online documentation.  The closest that I’ve been able to find are references to parts lists:

TM 11-5815-257-20P   Organizational Maintenance Repair Parts and Special Tool Lists: Reperforator, Teletypewriters TT-107/FG, TT-107B/FG, TT-109/FG, TT-345/FG, TT-345A/FG, TT-346/FG, and TT-364A/FG

TM 11-5815-257-35P   Field and Depot Maintenance Repair Parts and Special Tool Lists: Reperforator, Teletypewriters TT-107/FG, TT-107B/FG, TT-109/FG, TT-345/FG, TT-345A/FG, TT-346/FG, and TT-364A/FG

Judging by Duncan’s comments regarding the TT-4A I suspect that neither of these two documents (if found) would be much help.

Is anyone familiar with this reperforator?  Know of any documentation for it?

Also, the repeated use of “FG” in the designations means what?  “Field Grade” :->?  Would there be a (e.g.) different housing for “office grade”?

Thanks!

-----

paul

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

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