US Navy RTTY Equipment - Terminal Units
(Combined Keyer + Converter)

RTTY is also called RATT (Radio Teletype)

This page is for RTTY converters, keyers, patch panels, etc.
Go to Navy Teletype Page for actual TTY equipment

AN/SGC-1, AN/SGC-1A

(TT-40/SGC-1, TT-40A/SGC-1)

 

 sgc-1-01.jpg (15563 bytes)
AN/SGC-1

sgc-1-mod-01.jpg (20319 bytes)
AN/SGC-1 modified for ham use

sgc1a-101.jpg (27458 bytes)
AN/SGC-1A (modified from -1?)

sgc1-12.jpg (73157 bytes)
Later AN/SGC-1A

Early AFSK Terminal Unit (demod and keyer) primarily used shipboard for UHF RTTY links. 

detailed circuit description and schematic

 200 cps shift (700cps mark, 500 cps space). Can be readily converted to other shift freq. 

NAVSHIPS 91152 (SGC-1)

NAVSHIPS 91503 (SGC-1A) - available from WA5CAB

See CQ magazine April 1970, page 82, for info (avail at http://hamcall.net/cq)

manuf - Remler
CV-2460/SGC cv2460sgc-01.jpg (18909 bytes) AFSK Terminal Unit
(converter and keyer)

A= 500Hz space / 700Hz mark
B= 1575Hz space / 2425Hz mark

 

 - manuf - Stelma

manual NAVELEX EE162-AB-MMO-010/E110

Operating info (630kb pdf) 
CV-3510B/UG

AN/URA-17F diversity system comprises two CV-3510B

 cv3510b-ug-01.JPG (43188 bytes) AFSK Terminal Unit
(converter and keyer)

LF= 915Hz mark / 1085Hz space
VLF= 1000 Hz mark / 1050Hz space
HF= 1575Hz mark / 2425Hz space
UHF= 500Hz mark / 700Hz space
MMM= 1615Hz mark / 1785Hz space

 -

manual NAVSHIPS 0967-LP-340-0010 Technical Manual for Comparator- Converter Group AN/URA-17F

Operating info (630kb pdf) 

 SGC-1 has 2 connectors on chassis with cables running to a terminal strip in the case:

 CONNECTOR   TERMINAL
 STRIP   		  SIGNAL     COLOR             CONNECTOR   TERMINAL
 STRIP   		  SIGNAL     COLOR
 J108 (7 pin)                J107 (8 pin)         
 A     5     AF IN     BLK  A     7     TTY     BLK
 B     6     AF IN     YEL  B     8     TTY     YEL
 C     3     AF OUT     BLK  C     2     115vac     RED
 D     4     AF OUT     RED  D     1     115vac     GRN
 E      9     ???     YEL  E      12     ground     RED (control?)
 F     10     ???     BLK  F     11     control?     BLK
 G     -     -     -  G     case     ground     WH/BLK
               H     -     -    -