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Cryptigo P7m Viewer 4 5 Serial Killers

Jerry Proc's web site is A Great Place for crypto systems info
Cryptomuseum is also a Great Resource

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Cryptigo P7m Viewer 4 5 Serial Killers
  • This page is focused on 1950's-60's TTY, Facsimile, and Voice systems used by the US Navy
  • I'm just getting started - please send e-mail with photos, info, etc.
  • Back to Main Navy Radio Page
  • Back to Main Navy Teletype Page
  • Back to Teletype Equipment TEMPEST Page
  • Some info on equipment and procedures is in NSA's USS Pueblo cryptographic damage assessment
  • Some key systems in use at time of Pueblo capture in in 1968
  • Many Thanks to the National Cryptologic Museum for photos and info from declassified CSP 6620A
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Cryptigo P7m Viewer 4 5 Serial Killers 2017

Crypto Systems

(Navy CSP-2599, Teletype 131B2)
Data Sheet

Jerry's 131B2 page

Mixing Circuit

manual - TM 11-2209 - download

offline or online 60 wpm TTY in/out

Mixes (binary add) input stream with a One-Time Key Tape (PYTHON) or with Key Stream from KW-2 (GORGON)

NSA lecture on PYTHON

Used with CSP-2699 PYTHON key tape reader

Replaced by HW-10 + HW-19A

Modification for TEXT-CIPHER control by Model 28 teletypes

Repeater Panel
Repeater Panel
Mixer Panel
Mixer Panel

ECM Mark II (CSP 888/889)

Jerry's ECM Mk II page
SS-383's ECM Mk II Page
Cryptomuseum SIGABA page

ECM Mk II Manual

USN version of SIGABA
CSP-2900 was a later version

(SSM-3 is half duplex SSM-33)
Data Sheet

Jerry's SSM-33 page

SSM-33 in AN/SGA-4 System
Mixes (binary add) input stream with a One-Time Key Tape (PYTHON). Requires PP-1646/UG power supply.

Used with CSP-2699 Python tape reader

Replaced by HW-19A

Please let me know if you have a manual I can copy, or a unit I can buy.

CSP-2699 (TT-21/FG SIGTOT)
Data Sheet

Jerry's SIGTOT page

Teletype M14 TD variant used to read PYTHON one-time key tape - This RECEIVING TD operates slightly faster than a normal TD - 420rpm shaft speed but 368 opm (45.5 baud) line speed. This is necessary so that the key tape can always synchronize with characters from the source tape or keyboard.

Schematic Diagram (note TT-21 schematic is same as TT-25)

Teletype XD-100GW, 14ABM-1

Used with PYTHON systems AN/FGQ-1 (131B2), SSM-33, HW-18

replaced by HW-10

TM 11-2222 manual covering TT-21/FG

Description & Adjustments - Teletype Bulletin 189

Data Sheet

Jerry's HL-1 page

Tape Reader (50 wpm)
HL-1B is 65 wpm version for use with HL-2 in AN/SGA-3
Converts 5-level code on TTY tape to format used with KL-47 or KL-7/KLX-7

HL-1 or HL-1B can be modified to produce 1 ea. HLI-1 and HLT-1 for use in AN/SGA-5

Data Sheet

Electro-mechanical code converter

75 wpm

Used in AN/SGA-3

Converts KL-47 format output to 5-level TTY code.

(HW-5(D) - AFSAZ D7305)

need info

need photo 'Short term message synchronizer for use with non-synchronous on-line teletype security equipment, such as AFSAM 9 and one-time tape equipments' 1956 cost $700 ea.

(AFSAZ 7310)
Data Sheet

60 wpm one-time tape reader for PYTHON Used with HW-19A mixer

Replaces CSP-2699

Data Sheet

Offline or Online Lightweight Mixer - Mixes (binary add) input stream with a One-Time Key Tape (PYTHON) or with Key Stream from KW-2 (GORGON)

Authorized for receiving use only

Used with CSP-2699 Python tape reader

Replaced by HW-19A

(AFSAZ 7319)
Data Sheet

'HW-19D (Janized version) An on-line half-duplex, electronic mixer for use with teletype security equipment. Essentially radiation free.'

On-line or Off-line Mixer 60-100 wpm TTY- Mixes (binary add) input stream with a One-Time Key Tape
Replaces AN/FGQ-1, SSM-33, HW-18

used with HW-10

1956 cost $700

Data Sheet

Jerry's HY-2 page

Vocoder for use with KG-13

Data Sheet

Jerry's KG-13 page

NSA lecture on KG-3/KG-13

Point-to-point applications -
Command & Control Long Haul Voice
Data over Wire and Radio Circuits
NSG Long Haul Voice
Voice over Radio Circuits (DCS)
Multichannel Teletypewriter (DCS)
Data over Wire Circuits (DCS)

Full duplex key generator for encryption of digital data. With various converter equipment handles digital voice, facsimile, computer data, and multichannel teletype. Consists of drawer assemblies from KG-3 and KG-12 equipments. The full duplex equipment consists of 3 identical key generators, 2 synchronizers, an alarm assembly, and 2 power supplies. 0-100kc frequency range. Used with HY-2 vocoder and other equipment for long haul voice which is extended to local subscribers by means of KY-3 equipment.


Jerry's KG-14 page

online TTY, synced from KWR-37 to receive multi-channel fleet broadcast --


NSA lecture on KL-7
Jerry's KL-7 page
Cryptomuseum KL-7 page
CampX page - KL-7 documents
Dirk Rijmenants's KL-7 page

photo via Wikipedia
offline, printed tape output originally AFSAM 7

CSP 2900 version of ECM Mark II

Jerry's KL-29 page

need photo offline used with AN/SGA-3


Jerry's KL-47 page
Cryptomuseum KL-47 page

KLB-47/TSEC printer and switch mechanism photos offline, punched/printed tape output
version of KL-7

'Off-line, keyboard operated, literal cipher machine (36 pt rotors)'

used with AN/SGA-3

1956 cost $5,000 ea.

Data Sheet

Jerry's KO-5 page

online, 16 channels 100wpm TTY or 1 channel facsimile Used with AN/UGC-3 & AN/UGA-1 TDM multiplexer + AN/FGC-60 or AN/UCC-1 or AN/FGC-29 FDM multiplexer

Data Sheet

Jerry's KO-6 page

Used for Fleet Commanders Operations Voice Network

full duplex
1 channel voice
or 1- 5 TTY channels
or 1 facsimile channel

Replaced by HY-2/KG-13

Voice input from a special handset up to 6 of which may be used. Vocoder has 8 spectrum channels and 1 pitch channel. Its output of AM pulses is time-multiplexed and digitalized into an 8 bit code at 1500 baud. Crypto unit is an electro-mechanical Geared Timing Mechanism (GTM) using a photoelectric system with shadow-mask key disks. The self-contained 1500 baud frequency division multiplex system consists of six 250 baud FSK information channels and 1 sync channel. The required bandwidth is 3kc.

Data Sheet

Jerry's KW-2 page

online, TTY Combination of Key and Plain Text is performed in an associated mixer (such as AN/FGQ-1 above). Accepts 32 characters from remote teleprinter at 60wpm. Wired-rotor maze with integrated stepper mechanism. Maximum length of encipherment is 6000 characters off-line or 12 hours operation on-line.


  • Jerry's KW-7 page
  • Cryptomusem KW-7 page
  • NSA lecture on KW-7, KW-26, and KW-37
  • Used for ship-to-shore, ship-to-ship,and shore-to-ship (Fleet Tactical Relay)

1982 - KW-7 mounted in KWF-1/TSEC slide mount aboard CV-66

KWF-1 drawings

KW-7 operating procedure

1970's - KW-7 units at NAVCOMMSTA Stockton - mounted in KWX-11/TSEC rack slides

Rear view of KW-7 racks showing KWX-11 slides/connections (?)

KWX-11 drawings (see pages 21-27)


Remote phasing control for KW-7

KWX-8 operating procedure

1 - READY (green lamp)
2 - SEND pushbutton
3 - ALARM (red lamp)
4 - P&I phase indicator (yellow lamp)


(KW-22(D) = AFSAM D22)
Data Sheet

Jerry's KW-22 page

'Teletype security equipment for use with AN/FGC-5 electronic multiplex communications equipment.'

online, 4:1 multiplexed TTY
-used with AN/FGC-5 multiplexer or
AN/UGC-1 multiplexer

1957 cost $20,000 ea.

1953 Development Info - AFSAM D22 - Electronic key generator designed for use with the AN/FGC-5 Electronic Multiplex Equipment. Enciphers the output of the AN/FGC-5, which accepts 32 characters from remote teleprinters. Capable of two, three or four channel operation. Provides traffic flow security. Crypto-unit, which has been recently changed, supplies an additive binary key derived from a 53-stage Koken and associated combining circuits. Crypto-period set-up will be made from a Remington-Rand (or possibly IBM) card. Size and Weight 2 units, each 4' x 2' x 2'; total weight 500 lbs. Development Status - Development model has been completed and tested. An 18 month contract was awarded in May 1953, for the completion of a design approval model by February 1954, and pre-production model by November 1954.

(KW-26(D-3) = AFSAM D26 (X-4))

'On-line, fully synchronous single channel teletype security equipments (60-100wpm speed)'

1956 cost $15,500 ea.

NSA lecture on KW-7, KW-26, and KW-37

Jerry's KW-26 page

NSA KW-26 booklet

Used for ship-to-shore, ship-to-ship,and shore-to-ship (Fleet Tactical Relay)

online TTY

1970's - KW-26C's - NAVCOMMSTA Stockton

KW-26A units at NSA Communications Center - from NSA booklet
1953 Development Info - AFSAM D26 - Single channel synchronous equipment; accepts 31 characters (excluding blanks) from remote teleprinter. Operates at 60 or 100 words per minute and provides traffic flow security. Crypto-component supplies an additive binary key derived from a 53 stage Koken and associated combining circuits and includes means to prevent the reading of messages in depth. Crypto-period set-up will be made from a Remington Rand (or possibly an IBM) card. Size and Weight: One 6' x 19' rack. Development Status: One engineering model of the transmit terminal is almost complete and construction of the receive terminal is underway locally.


Jerry's KWR-37 page
Jerry's KWT-37 page

NSA lecture on KW-7, KW-26, and KW-37

Used for fleet broadcast

online TTY

acted as master sync/control for KG-14's on other channels

1970's - rear view showing KW-37 (?) - NAVCOMMSTA Stockton

Data Sheet

Jerry's KY-3 page

Used standalone for short-haul voice or with HY-2/KG-13 for long haul voice Wide-band speech security equipment

50 kc diphase transmission system. Keying via punch cards

Used with SY-1 switchboard for up to 12 KY-3 lines


need info

need photo '50 KC, single channel, pulse code modulation voice security equipment for use over an 'N' carrier channel' 1956 cost $18,500 ea.

Shipboard System Installation Drawings

Jerry's KY-8 page

need better photo
Interim VHF/UHF Secure Voice System - includes KYB-6/TSEC equipment, HYP-2/TSEC power supply, KYB-13/TSEC shock mount Manual NAVSHIPS 0967-190-3020

Data Sheet

Jerry's KY-9 page

Used for High Command Joint Circuits.

Transistorized, half-duplex, narrow-band speech system. 1650 baud, 3kc bandwidth.

(KX-3(D-1) = AFSAX D503A

need info

need photo 'A fixed plant black-white facsimile equipment. Additional equipment such as the AFSAZ D7300 or AFSAZ D7306 is required for radio or wire transmission' 1956 cost $20,000 ea.

Crypto-Related Teletype Equipment

(Used with KW-2)

Consists of CY-2245/FGA-2, C-2273/FGA-2, PP-1646/UG, and Repeater-Mixer SSM-33. Used with CSP-2699 and TSEC/KW-2.

Data Sheet

75wpm units used with KL-34 & KL-47 crypto equipment

Teletype Equipment manual - thanks to RTTY Electronics

Please send email if you have any info or photos. What is a Teletype Type 58 TD? What is a M28 DW1 typebox?

TT-36/GGA-1 TD (Type 58)
TT-37/GGA-1 KTR (M14 - FPR23DK246, FK110LD)
(TT-37 plus table & rectifier)
TT-39/GGA-1 KSR (Model 15 lightweight)
PP-315/GGA-1 RECT (REC-30)

TT-36/GGA-1 (Type 58)
TT-37/GGA-1 KTR (M14 - FPR23DK246, FK110LD)
(TT-37 plus table & rectifier)
TT-183/GGA-1A KSR (M28 TT-47 w/ 75wpm & DW1 typebox)
PP-315/GGA-1 RECT (REC-30)

TT-36/GGA-1 (Type 58)
TT-37/GGA-1 KTR (M14 - FPR23DK246, FK110LD)
(TT-37 plus table & rectifier)
TT-184/GGA-1B KSR (M28 TT-69 w/ 75wpm, DW1 typebox)
PP-315/GGA-1 RECT (REC-30)

These photos are from the offline crypto area at NAVCOMMSTA Greece.


Please send email if you have any info or photos.

Teletype Equipment manual - thanks to RTTY Electronics

TT-36 photos thanks to Duncan Brown

(includes SSM-3)

need photo

TTY system (off-line) for use with classified communications equipment. Consists of XMTR DISTR, Rack, MT-1679/SGA-1, CSP-2699, Switching Unit, CSP-3333, Power Supply, CSP-3334, TTY TT-69A/UG, REPERF TT-159/FG, Mixing REPEATER Unit SSM-3, XMTR DISTR TT-57/UG.

(includes SSM-33)

need photo

This EQUIP is for the TTY system (off-line) for use with classified communications equipment. No other information available. Complement data is the same as AN/SGA-1, except this set uses the MT-1680/SGA-2 instead of the MT-1679/SGA-1 and the SSM-33 instead of the SSM-3..

AN/SGA-3 Teletypewriter Code Group
Data Sheet

Off-line TTY code group for use with classified communications equipment. AN/SGA-3 is used with, but not part of, TSEC/KL-47 or TSEC/KL-29. Consists of Control Converter TSEC/HL-2, PERF-REPERF TT-253/UG, Tape Reader TSEC/HL-1B, Power Supply PP-1767/UG, TTY TT-234/SGA-3.

A configuration of teletypewriter and ancillary equipment designed expressly for shipboard use to provide for automatic off-line encryption and decryption of teletype traffic. The cryptographic keying variables are determined by the rotor maze of the associated cipher machine.

Perforated tape previously prepared from incoming radio teletypewriter or CW circuits is fed into the tape reader which actuated the pre-set cipher machine. Output of the cipher machine is converted into teletypewriter code signals by the code converter whose output provides pulses which are used to produce a page copy or a reperforated tape or both. The speed of operation is 50 baud.

The complete configuration consists of the following components:

  • HL-18 (Tape Reader
  • HL-2 (Code Converter)
  • TT-159/UG (Model 14 Typing Reperforator)
  • KL-47 (Literal Cipher Machine)
  • TT-234/SGA-3 (Model 28 Page Printer)
  • PP-1767/UG (Power Supply)
PP-1767/UG Loop supply

(used with KL-29 and KL-47)
(includes TSEC/HL-2 and TSEC/HL-1B)

Specifically designed to process classified messages automatically on an off-line basis. AN/SGA-3A is used with, but not part of, TSEC/KL-47 or TSEC/KL-29. Consists of Control Converter TSEC/HL-2, Tape Reader TSEC/HL-1B, .Power Supply PP-1767/UG, TTY TT-234A/SGA-3, Typing Reperf TT-159/UG.

Data Sheet

Provides mounting facilities for accommodating the various units in a compact set for operational passing and handling of classified communications traffic. Specifically used in classified communications centers with on- and off-line circuits in handling traffic. Used with XMTR DISTR CSP-2699 (2 each). Consists of 2 ea TT-57/FG; 1 ea TTY Mixer SSM-33;. 2 ea. PP-1646/UG; 2 ea MT-1951()/SGA-4; l ea. MT-1952()/SGA-4; 2 ea TT-69A/UG or TT-176/UG; 1 ea TT-159/UG; 1 ea TT-103/FG or TT-159/UG with table (TTY Model XRT 119); l ea C-2192/UG; 1 ea SA-561()/UG; 1 ea SB-6/GG.

Data Sheet

Provides facilities to automatically process classified messages on an off-line basis. Offline TTY code group for use with classified communications equipment. Used with, but not part of, TSEC/KL-47. Consists of 1 ea of the following: Electrical EQUIP Cabinet CY-2739/SGA-5; Tape Reader TSEC/HL-1B(Modified); Power Supply PP-1010/UG; TTY TT-176;UG; REPERF-TTY TT-27g/UG


Need Photo and info

16:1 time division mux/demux for synchronous TTY channels

need more info

used with TSEC/KO-5
used with AN/UGC-3

Need more Info
FUNCTIONAL DESCRIPTION The AN/UGA-1 is designed to accept multiplexed output of sixteen (16) channel multiplex equipment and divides it into sixteen (16) separate channels which are synchronously related to each other. Output on each channel is in six (6) unit synchronous signal. The receive portion of the equipment performs companion function.
RELATION TO OTHER EQUIPMENT The AN/UGA-1 is designed to be used with but not part of AN/UGC-3() for use on frequency division telegraph systems.
TYPE OF DIVISION: Time-division type.
NUMBER OF WORDS PER MINUTE: 60, 75, 100 words per minute per channel.
RELATION OF CHANNELS INPUT AND OUTPUT: The 16 channel inputs and outputs are synchronous in nature and are synchronously related.

The AN/UGA-1 is for specific use with terminal set AN/UGC-3 in a fixed-station operation. The transistorized AN/UGA-1 provides facilities for the operation of AN/UGC-3 with radio equipment AN/FGC-29. The transmitting group accepts a neutral sequential signal of information such as provided by the 16-channel AN/UGC-3. The sequential signal is then converted, and re­transmitted in 16 individual channels of information and combines them into a neutral sequential signal that can be utilized by the AN/UGC-3. AN/UGA-1 can change a high speed sequential signal into multiple low speed signals that can be transmitted over conventional radio TTY facilities, in addition to receiving circuits for converting multiple low speed signals into a high speed sequential signal.

  • 1 ea Cabinet CY -300UUG,
  • 16 ea. Output Code Converter CV-1030/UGA-1
  • 1 ea. Input Demultiplexer TD-428/ UGA-1
  • 1 ea. Output Multiplexer TD-429/UGA-1
  • 1 ea. Power Supply PP-2758/UG,
  • 16 ea. Input Code Converter CV-1029/UGA-1.
Power input: 115 V±10% , 50/60 cps ±5%, 1-ph, 1. 6 amps, 140 W.
For use with standard 60-speed TTY XMTR-DISTR's.


need photo and info

16:1 start-stop TTY mux/demux
Used with TSEC/KO-5

Related to 4:1 mux/demux AN/UGC-1

need photos and more info

FUNCTIONAL DESCRIPTION: The Telegraph Terminal Set AN/UGC-3 is a transistorized, sixteen (16) channel, time division, multiplex equipment for fixed station installation. A complete set consists of a transmitting and receiving group. The transmitting group accepts neutral, start-stop signals from up to 16 separate circuits and assembles them in sequential order for multiplex transmission over a single circuit. The receiving group accepts multiplex signals from a distant source, converts them to start-stop, and distributes them to 16 separate circuits. Signals are received from a number of start-stop teletypewriter circuits, stored, and transmitted over common channel. In this process, the message characters from the start-stop circuits are com­pressed in time so that a character from each of these circuits is transmitted in the time normally required to send one character from a single circuit. The receiving multiplex terminal sorts the compressed signals into their respective circuits and regenerates them into normal length start-stop characters. Adjacent siting of the receiver and transmitter group permits use of the built-in test equipment in both.
TYPE OF MULTIPLEXING: Time-division type.
TYPE OF FREQUENCY CONTROL: Temperature controlled crystal oscillator.
REPETITION RATE: 60 wpm-440 pps; 74 wpm-562.5 pps; 100 wpm-733.69 pps.
NUMBER OF CHANNELS: 4, 8, 12 or 16.
RELATION TO OTHER EQUIPMENT: In four channel operation, the multiplex signals of the AN/UGC-3 are completely compatible with those of AN/UGC-1 at all speeds and with the AN/FGC-5 at 60 & 75 words per minute. Any standard apparatus using a 7.42 unit code may be employed in the start-stop circuits. All start-stop equipment must have the same operating speeds of 60, 75 or 100 words per minute. The AN/UGC-3 is designed to be used with, but not part of AN/UGA-1.

AN/UGC-3 is a transistorized 16-channel TTY time division multiplex equipment utilizing components and techniques used in the 4-channel equipment (AN/UGC- 1). Used with radio or wire link, and AN/UGA-1. Channel speed: 60, 75, or 100 WPM. Power required: 115 v, 60 cps, 1 ph.


Single-channel time & frequency multiplex for immunity to multipath and fading.
Used with KO-5 crypto system for fax transmission


photos from ebay via Jerry Proc

sync control switch for KW-7 Jerry's KW-7 page


SB-2244/UG Patch Panel

Please send me e-mail with any info about how this was used.

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.

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.

Note - as of 5/2013 Fair Radio has this one unused in the box for sale - with manual and patch cords.


Crypto signal switchboard
8 switches connect a KG-14 to one of two selected KWR-37

SB-3195/U aboard FFG-54

Please send me e-mail with any info about how this was used.