US Navy RTTY Equipment - Patch Panels

RTTY is also called RATT (Radio Teletype)

TTY PATCH PANELS

High-level signals are usually 60ma loops (120vdc). 
Low level signals are +/-6vdc. Originally all circuits were high-level until low level signaling was introduced because of TEMPEST concerns.

Each loop or circuit contains the following jacks: 

"NOTE: Anyone patching or unpatching circuits from a TTY panel must be sure to pull the plug from the looping jack (LPG) before removing the other plug from the SET (machine) jack. Pulling the SET jack first interrupts all TTY message traffic on that channel. IT ALSO PRODUCES A DANGEROUS DC VOLTAGE ON THE EXPOSED PLUG!"

COMMSTA Patch Panels

This info is from a USAF Relay Center training document, but Navy COMMSTA setups would have been similar

panel-01.jpg (93329 bytes)
Typical Layout
panel-02.jpg (135088 bytes)
Circuit details
 

More pages - download pdf
Thanks to James Tanton

US Army patch panel info
thanks to Sheldon


High-level (60mA) Patch Panels

TT-23()/SG 

6 channels
2 LPG, 1 SET, 1 MISC

tt23b-01.jpg (51423 bytes)
photo thanks to WA5CAB

 includes a switch for each channel to select external or internal loop supply

Schematic

Manual is NAVSHIPS 91480 (avail from www.wa5cab.com)

SB-6/GG
(Western Electric 63C2)
SB-6A/GG
sb6-gg-02.jpg (121950 bytes)

 

SB-6A/GG (Signal Corps)
thanks to Kevin
sb6a-gg-1311.jpg (569505 bytes)

4 Channels
2 LPG, 1 SET, 1 MISC

63C1 wiring diagram
thanks to Roy
we-patch-schem.jpg (1382834 bytes)

sb6-gg-05.jpg (271888 bytes)
Unstamped but a typical USN ID plate
sb6-gg-04.jpg (338544 bytes)
and USN inspection stamp
sb6-gg-03.jpg (85272 bytes)
sb6-gg-06.jpg (188347 bytes) --

SB-1203/UG
SB-1203A/UG
SB-1203B/UG

DSCN0159.JPG (5543638 bytes)
SB-1203 aboard USS Midway

sb1203a-ug-201.jpg (44038 bytes)


6 channels
3 LPG, 1 SET, 1 MISC
sb1203a-ug-204.jpg (52819 bytes)
sb1203a-ug-203.jpg (32352 bytes)
More info - schematics, connections, operation, etc.

SB-1203/UG is for black (unclassified) circuits

sb1203-01.JPG (97930 bytes)

manual - 
NAVSHIPS 95718

SB-1210/UGQ
SB-1210A/UGQ
SB-1210B/UGQ

sb1210a-1605-01.jpg (230878 bytes)

6 channels
2 LPG, 2 SET, 1 MISC

sb1210-02.jpg (26757 bytes)

sb1210-03.jpg (24893 bytes)

More info - schematics, connections, operation, etc.

SB-1210/UGQ is for red (classified) circuits.

manual - 
NAVSHIPS 95718

SB-1210 aboard USS Midway
DSCN0140.JPG (5676011 bytes)

SB-2244/UG 

for crypto equipment with step control of TTY tape reader.  

NAVSHIPS 91622 manual
 - thanks to Don N3RHT

3 dual channels
2 LPG, 2 SET, 1 MISC

The special patch cords are dual cords with a pin that matches the hole between the jacks - this prevents getting TTY and STEP signals crossed.

sb2244-ug-10.jpg (2367501 bytes)

Channels 1,3,5 have TTY current control and metering - Channels 2,4,6 have associated "STEP LOOP" indicators. The STEP signal releases the next character from a TD under timing control of the crypto gear.

sb2244-ug-01.jpg (92847 bytes)

sb2244-ug-02.jpg (47527 bytes)

sb2244-ug-11.jpg (2364305 bytes)

Note - as of 5/2016 Fair Radio has this one unused in the box for sale - with manual and patch cords.

SB-3576/UG

sb3576-01.JPG (46800 bytes) 24 channels
2 LPG, 2 SET, 1 MISC

includes fuses and alarm bell to indicate blown fuse

  -

SB-4034/UG

SB-4034 aboard USS Iowa
DSC02126.JPG (3945070 bytes)
SB-4034/UG interior
DSC02125.JPG (4407814 bytes)
24 channels
2 LPG, 2 SET, 1 MISC

SB-4035/UGQ
sb4035-469.JPG (1631435 bytes)

sb4035-470.JPG (1623388 bytes) sb4035-471.JPG (859163 bytes) sb4035-475.JPG (532106 bytes)

24 channels
2 LPG, 2 SET, 1 MISC

sb4035-472.JPG (2715435 bytes) sb4035-473.JPG (1364771 bytes) sb4035-474.JPG (2470592 bytes)

Low Level (+/- 6v) Patch Panels & Switching Unit

SB-3145/UG

COMMUNICATIONS PATCH PANEL, SB-3145/UG - This communications patch panel is a low-level, send-and-receive teletype, special-purpose patch panel. It is capable of handling 20 half-duplex or 10 full-duplex circuits. Figure 4-21 illustrates the front panel. Jacks and controls are indexed and referenced to descriptions listed in table 4-9. The panel is normally configured for full-duplex, send-and-receive operation. The circuits are numbered 1 through 10, with circuit 1 located on the left side of the panel and circuit 10 on the right side of the panel. Each circuit requires two columns of jacks-one column for send and the other for receive.

For Low-level signals (+/-6v) with 3-conductor patch cords (signals on ring & tip)

Installation drawings

SB-3189/FGC
SB-3189A/FGC
SB-3189B/FGC

SB-3189B aboard USS Iowa
Secure (Red) TTY Patch Panel
DSC02161.JPG (4100940 bytes)
DSC02162.JPG (4323023 bytes) For Low-level signals (+/-6v)

3-conductor patch cords
(signals on ring & tip)

 

SA-1794/UG Low-level Switching Unit

SA-1794/UG installed aboard FFG-54
ffg54-11030-sb.jpg (472311 bytes)
SA-1794/UG Teletypewriter Switching Unit Incorporates 6 push-pull rotary switches with instantly removable wafers, low level gold plated contacts, wafers and receptacles, extension capabilities for system expansion, a completely shielded enclosure and minimum size; each unit contains six eight-position switches, mounted in two vertical rows; the positions are six active transfer positions, one extension position and an OFF position; switch position indicating device indicates both the rotary position and the IN position of the knob; when a switching matrix of more than six is desired, additional input or output (or both) devices can be added by using the extension position of the basic switch; systems of any size can be assembled with the multiple use of one basic module.
sa1794-ug-1510-02.jpg (216415 bytes) sa1794-ug-1510-01.jpg (213984 bytes) sa1794-ug-1411-02.JPG (195760 bytes) sa1794-ug-1510-03.jpg (174209 bytes)
sa1794-ug-1411-01.JPG (246151 bytes) sa1794-ug-1411-03.JPG (203840 bytes) sa1794-ug-1411-05.JPG (222910 bytes) sa1794-ug-1411-04.JPG (194536 bytes)
 

CONTROL BOXES & INDICATORS

C-1004/SG

c1004bsg-02.JPG (66686 bytes) c1004bsg-01.JPG (57776 bytes)
  • shipboard use
  • located near TTY unit
  • turns xmtr off/on
  • selects AFSK (tone) or FSK (CFS)
  • wiring & operation info
  • manual NAVSHIPS 92279

C-1004D/SG

C1004D-01.jpg (149853 bytes) c1004d-02.jpg (186176 bytes)  

similar to C-1004 

no on-off pushbutton switches


SA-734/SG Switch and ID-866/SG Indicator

NOTE - These seem a bit confusing. RED normally means classified circuits and BLACK means unclassified circuits.
However, the SA-734 UNCLASSIFIED switch position is RED and the ID-866 UNCLASSIFIED lamp is RED.

Furthermore, I have seen some ID-866 red/green units where the CLASSIFIED indicator is RED and the CAUTION-UNCLASSIFIED indicator is GREEN
This is incorrect - See below.

The reasoning is because these are Teletype machine connections - if you are connected to the UNCLASSIFIED switchboard you need to be careful typing because you will transmit in the clear. If you are connected to the CLASSIFIED switchboard, anything you type will be encrypted anyway. Note that some of the USS Midway switches are labeled SECURE CIR OFF (RED) and SECURE CIR ON (BLACK), which is clearer.

AHA - Here's the spec (MIL-STD-1680C) 
5.3.4.4 Lock-out switch visual indicator. The ID-866/SG Indicator Light provides a visual indication of the setting of the SA-734/SG or SA 2371/SG Switch Box. Where the switch box is used for a sharing of processing equipment, the indicator light shall be co-located with the processing equipment for operator viewing. Where the switch box is used as a RED signal line disconnect, the indicator light shall be co-located with the switch box. Visual indicator lamps for Classified or Unclassified, or Classified or Disconnect shall have the following color jewels installed:

  • Green jewel: Color to indicate a classified circuit, or a circuit of higher classification. 

  • Red jewel: Color to indicate an unclassified circuit, a circuit of lower classification, or disconnect position.

I finally got a manual (NAVSHIPS 93757) - 5 MB pdf - and it confirms RED means you are connected to the UNCLASSIFIED switchboard.

ID-866/SG

id866-sg-03.jpg (25287 bytes)

The ID-866/SG Indicator Light, when used to show the status of a shared RED/BLACK processing equipment, shall derive primary AC. power from the shared equipment to assure the ID-866/SG is energized when the shared equipment is energized.

UNCLASSIFIED/CLASSIFIED
warning indicators with correct color scheme.

id866-sg-01.JPG (24989 bytes)  id866-1412-03.JPG (186267 bytes)

ID-866 and SA-734 aboard USS New Jersey with the WRONG ID-866 color scheme. 
sa734-bb62.jpg (49427 bytes)
SA-734 & ID-866 aboard USS Iowa
with the WRONG ID-866 color scheme
DSC02037.JPG (3477619 bytes)
id866-1412-01.JPG (190710 bytes) id866-1412-02.JPG (222459 bytes) id866-1412-06.JPG (181475 bytes) id866-1412-05.JPG (181560 bytes)

SA-734/SG

sa734-sg-91.jpg (52576 bytes) TTY switch - key lockout of plug and connections
sa734-sg-92.jpg (46513 bytes)
sa734-sg-93.jpg (44296 bytes)
ID-866 and SA-734 aboard USS Midway
DSCN0141.JPG (5676360 bytes)
sa734-sg-1307-01.jpg (97074 bytes) sa734-sg-1307-02.jpg (107688 bytes) sa734-sg-1307-03.jpg (171295 bytes)

TSEC/KWX-7

kwx_07b.jpg (19318 bytes)
photos from ebay via Jerry Proc
kwx_07a.jpg (22751 bytes)
  • sync control switch for KW-7
    crypto unit