The KY57/58/68 Transmission Security Device is designed to protect the transmission of voice or data in the form of audio tones. For example a FAX transmission can be encrypted using the KY-57. This is a VINSON family digital voice encryption that replaced the NESTOR voice encryption as used with the KY-38. It should interoperate with the KYV-2 and SINCGARS.
The KY-57 is being replaced by the KY-99A Miniterm which is very close to the size of the KY-57. Looks to be a form, fit and function replacement but with a lot of additional capability.
It can make use of the SAVILLE advanced remote keying (SARK)also called Over The Air Re-keying (Wiki: SAVILLE, NSA Suite A Cryptography, NSA cryptographic algorithms). This may have come about either because of the need to reduce the logistics problem of securely distributing keys and/or to improve the security of the keys (for example Walker got access to keys in transit).
The KY-57 is the man portable ground equipment and is only contains the voice encryption function so it needs to be used with a radio or wire line.
Note that the classical KY-57 uses a digital data stream at 16 k bits per second and so needs what's called a wide band radio channel. This is why military radios have 25 kHz channel spacing whereas commercial plain text radios use a 5 kHz channel spacing. Because of this need for bandwidth the VINSON system will not work on H.F. radios, only VHF and UHF wideband radios.
The Frequency hopping aspect of radios like the SINCGARS and Have Quick makes it difficult for an enemy to get a bearing on a transmitter, but does not provide secure voice transmission. That's why these radios either use a KY-57 or KY-58 or have an equivalent function built-in.
The KY-57/58/67 support OTAR, Over The Air Rekeying. This can be done once the KY-57 has a Key Encryption Key (KEK) loaded in variable slot 6. The new key variables are transmitted in the clear as Black keys and converted into Red keys by the KEK as they are loaded into the slots. Note the KEK can not be sent over the air and needs to be loaded locally.
Other Type 1 non inter operable algorithms are BATON, PADSTONE, Fascinator, FIREFLY. Type 3 algorithms are: DES (OFB, CFB, ECB), Triple DES, AES.
Controls and IndicatorsThere are no visual indicators, all indications of operation are done by audio tones heard in the handset.
Code Slot SwitchHas 8 positions:
Z1-5 clears the keys from positions 1 through 5, leaving 6
Positions 1 through 6 select the key to be used
Z All - clears all the keys
Mode SwitchHas 4 positions:
P - Plain
C - Cipher
LD - LoaD Key
RV - Receive or Radio Variable for OTAR
The crypto variable in slot 6 is for this use.
Power SwitchHas 3 positions:
OFF - Off
ON - On
TD - On with Time Delay for Satellite operations
VOLUME ControlIs a standard rotary knob control.
Connectors19 male pin circular military bayonet lock connector for interfacing to a radio.
Rx CT in
Rx Data out
Tx Data in
Tx CT out
FILLA 6 pin U-229 type connector used to load the keys into the KY-57. Since the KYK-13 can load the keys they probably are 64 bit keys. Note that there is an export limitation on key size of 40 bits. So the KY-57 could not be sent to friendly countries without a lot of paper work. So companies in the Crypto machine business offer alternates to the VINSON system that have a 40 bit key.
Since the KEK can also be loaded by the KYK-13 it too probably is a 64 bit key (128 bit?).
The Red keys in slots 1 thorugh 6 are called Transmission Encryption Keys (TEKs). The Key Encryption Key goes into slot 6 for Over The Air Rekeying (OTAR).
Best Guess Pin Function TableFor more on this connector see my U-229 Pin Out web page.
Pin Function A
Fill Req / Load Ack
A 6 pin U-229 type connector for an H-250 type handset or other standard military audio accessory. The KY-57 also supports synchronous data on the AUDIO connector.
Best Guess Function Table
Spkr Out / Rx Data Out
Mike In / Clock Out
Tx Data In
Main BatteryThe main BA-5590 type battery is connected to the back and housed in a Z-AIJ battery box.
Hold Up Battery (HUB)There's a cover plate on the bottom that houses the BA-5372 HUB.
The following radios can use the KY-57:
PRC-119 SINCGARS VHF-FM (only the RT-1439, later radios have the KY-57 built in)
VRC-12 VHF-FM RT-524/RT-246
GRC-206 VHF-FM & UHF
PRC-77 VHF-FM (Not the PRC-25)
PRC-126 VHF-FM (would require special cable/adapter, used to be KYV-2)
VRC-83 UHF part of GRC-206, MT-6250
TRC-176 VHF-AM & UHF
The main battery is a BA-5590 or others in that family. This is a case with two independent 15 Volt batteries that that the KY-57 connects in series for a nominal 28 VDC. The KY-57 appears to have been designed with it's front panel height (3") and width (5") chosen based on the size of the connector face of a BA-5590 (2.5 x 4.375").
The Battery box ON241845 NSN 5810-01-048-8167 has a couple of "J" clips that are held by the latches on the KY-57.
The battery box may also be called the Z-AIJ-E1 but it does have NSN 5810-01-048-8167. The battery could also be a BA-359, or any of the Bx-5590 family.An alternative way to power the KY-57 is by using a HYP-57/TSEC adapter. One side of this adapter looks like the top of a BA-5590 and it has the "J" latches so that it can be attached to the bottom of the KY-57. The other side has an MS3114E-14-5-P connector to allow an external power source to be used for main power. This would be used for vehicle or fixed installations.
Inside there are a couple of filters installed in series with the red wire between two separate cavities probably for TEMPEST and/or EMP (Wiki) shielding. Note that with a battery source there is no TEMPEST concern with the DC supply.
The KY-57 battery plug has pins 2 & 4 tied together so the DC voltage powering the KY-57 is 30 Volts for a fresh BA-5590. This is consistent with the idea of getting power from a military vehicle with a nominal "28 Volt system, which in reality is a 20 to 30 V range.
J2 MS3114E-14-5-P J1 BA-5590
A = D
28 V Red wire
Note the BA-5590 Discharge test cable SC-D-866543 (2 ft 0 in) can NOT be used to confirm the above wiring. This cable is wired White to 4 (+), Black to 2 (-) & 6, and has a jumper 1 (-) to 5 (+). Note the jumper places a short across the above hot connection between battery socket 1 and 5!
Since the KY-57 will run from a BA-5590 it's input voltage range is probably 20 to 30 VDC. It draws about 170 mA from a 27 VDC source.
The PMD100A is a very similar box, except the DC input power connector (the same as on the HYP-57) is on the side BUT is wired with E as the +24 input and B as the ground. There is a warning sticker on the PMD100A since someone might use a DC power cable made for the HYP-57 by mistake. If this was done no damage will occur, it just won't work.
HUBThe original Hold Up Battery was the BA-1372 Mercury battery that's now been replaced by the BA-5372 Lithium battery.
The BA-1372 was made by stacking 5 each "625" Mercury button cells and adding a pointed cap to the Negative end. 1.35 Volts * 5 cells is 6.75 Volts.
This reverse polarity convention has been carried forward to the BA-5372 LiMnO2 Battery, so pay attention to the polarity.
It seems that all the cables carrying information are made using the conduit type rather than using a conventional cable and connectors. The conduit cables have a much better shield that meets TEMPEST and EMP requirements that can not be met using a conventional cable.
For other VINSON cables see the USM-481 Cable Tester web page.
CX-12991 KY-57 <-> PRC-77
19F - 14m
J-3513-J3 to KY-57 RADIO VRC-64 U-316 - 14-19S
KY-57 AUDIO to J-3513-J1 GC-239 - 8-4P
J-3513-J2 to HYP-57 Pwr In
8-3P - 14-5S
"Y" Cable J3513-J6 to X-mode to RXMT 12-10P - U-316 - GC-329
J-3513-J6, AM-2060 Set Pwr, PRC-77 power
U-316 - U-316 - U-316
Vehicle 24V power to C-10374 (off-retarans box)
MW10M - 16-26P
HYX-57 <-> J-3513/J-3514
26f - 14m
HYX-57 <-> PRC-77
26f - 26m
KY-57 <-> HYX-57 19f - 26f
CX-13073 KY-57 data input to AUDIO/DATA GC-239 - GC-239
HYX-57 <-> HYX-57 (repeater)
26f - 26f
Audio "Y" cable
KY-57 to J3513-J6 14-19S - 12-10P
KY-57 <-> RT-1439
55m - 19f - audio
CX-13310 SINCGARS <-> HYX-57 55m - 26f
566084-809 KY-57 <-> VRC-83
5995-01-224-8698 SM-D-938057 KY-57 <-> C-6709/G Radio Set Control
The CX-12991 Connects between the PRC-77 POWER connector and the KY-57 RADIO connector.
This is a conduit type cable where there are individual wires inside a hollow tube.
2 feet 6 inches long used in the Man-Pack configuration.
PRC-77 Function KY-57 Function
A Ground Ground
B Rx audio (same as AUDIO B)
P.T. Audio In
C PTT (same as AUDIO C)
D Mic (same as AUDIO D)
Bal Mike Out
E +15 power to FUNCTION switch (Ext + 15 VDC in here) jump to PWR-F
F +15 VDC from battery (Z1 jumper plug connects E & F) jump to PWR-E n.c.
H spare, not used
PRC-77 uses a
15 V LITE
J ground for pin D Bal Mike Out
K ReTrans PTT n.c.
L gnd = 150 Hz Tx tone disable
E & T
M spare, not used n.c.
N +10 VDC reg n.c.
P wideband audio out Cipher Input
R wideband audio in Cipher Output
The KY-57 connector is marked PT110021-37723.
Uses conventional cable construction, not the conduit type.
It is NOT electrically the same as a CX12991, so probably is a special used for the manufacture of KY-57s.
This cable connects the KY-57 to a C-6709/G Radio Set Control for interfacing to a 4 line switchboard. Note this interface is on the AUDIO side of the KY-57, not the crypto side. This is probably a U-229 to U-229 cable. The identical cable is used to connect the GRC-193, MRC-138, PRC-70, PRC-77, PRC-104, VRC-12, VRC-43 -> VRC-49, KY-38, KY-65. Ref TM 11-5820-615-12.
||Rx CT in|
||Rx Data out||nc
||PT or ?
||Tx Data in||R
||Tx CT out||B
The GRA-39B is a narrow band wire line adapter and the HYX-57 is a wide band wire line adapter. It has no cryptographic capability, it does pass the encrypted signal. There are various cables to allow connecting the HYX-57 to various radios on one end of the link and to another radio at the other end of the link or to the KY-57. A pair can be used to form a telephone with a couple of handsets. Many possible configurations.
10 mile range between HYX-57 boxes when using 2 pair (quad) cable.
Two HYX-57 units can be connected back to back forming a repeater to increase the wire line range.
Used for point to point communications. Typically the Receiver Transmitter and it's antenna are located a few clicks from the radio operator. The big connector has 26 pins whereas the KY-57 has a 19 pin connector. The mechanical outline of the HYX-57 is identical to the KY-57 and they both can use the same mounts, battery boxes and power supplies.
There is a data rate switch on the HYX-57 which indicates it's working with digital data, not wideband audio data on the wires.
16 k b/s for VINSON, 18 k b/s for NESTOR (KY-38), or 8 k b/s for ?.
These show up on eBay every now and then and some are promoted as being a KY-57 which is not the case.
Manuals Wanted contact Brooke
gnd = 150 Hz Tx tone disable
PTT (same as AUDIO C) PTT Out B
wideband audio out
wideband audio Input K
Rx audio (same as AUDIO B) P.T. Audio In M
wideband audio in
wideband audio Output N
ground for pin D
Bal Mike Out Y
Mic (same as AUDIO D) Bal Mike Out Z
+15 v to FUNCTION switch jump E to F
+15 v from battery
jump E to F n.c.
MK-2146/VRCInstallation kit, electronic equipment MK-2146/VRC (For KY-57 in combination with radio sets AN/VRC-43 OR AN/VRC-46 GENERAL USE ALLOCATION 7FT.) 5810-01-125-1029 INST. KIT MK-2146, 1 EA. B 4/87, PPL 10,049 ISSUE # 1 YA 1388
Contents 5810-01-125-1029 installation kit, elec. equip MK-2146/VRC
Mounting base, elec. equip
The KY-57 with the HYP-57 are clamped in the mount.
There is a rectangular hole in the back to allow access to the J2 power connector on the back of the HYP-57.
CX-13061/U (7FT)***5995-01-050-9887 Cable Assembly, Spec Purp Elec.
CX-13062/U (7FT)***5995-01-059-5275 Cable Assembly, Spec Purp Elec.
CX-13063/U (7FT)***5995-01-058-4521 Cable Assembly, Spec Purp Elec.
CX-13064/U (1FT -"Y")***5995-01-043-3872 Cable Assembly, Spec Purp Elec.
Cable Clamping kit, Univ.***5820-01-045-3153
Interconnection Box J-3153/U OR 5810-01-078-1881 J-3513A/U
HMMWV MK-2827/GRC-240The AN/GRC-240 HAVE QUICK II ground radio set consists of the AN/VRC-83 vehicle radio and the AN/PSN-11 set. The Receiver/Transmitter is tunable between 116.000 to 149.975 MHz (VHF-AM) and 225.000 to 399.975 MHz (UHF-AM) at 25.0 KHz channel spacing. This spacing provides 1360 VHF and 7000 UHF channels plus one Guard Channel at 243 MHz. This radio set provides a 2, 10 and 30 watt carrier transmitter for normal AM voice and anti-jam frequency hopping communications mode. The radio will accept global positioning system time signal per ICD-GPS-060. The Precision Lightweight Global Positioning Receiver, AN/PSN-11, will be mounted in the dash board area on the passenger side of the vehicle. When operated with the KY-57, it can provide a COMSEC mode. The AN/VRC-83(V)3 and the KY-57 will be mounted in the HMMWV behind the driver. The installation kit is designated the MK-2827/GRC-240. The total system weight is 78.0 pounds.
SINCGARS MK-2499When the RT-1439 is used with the KY-57 the installation kit is the MK-2499 and uses the MT-6429.SB 11-700 Installation Kits for KY-57 (ETM "B" list)
The MT-6429 probably was made to hold other equipment (LST-5(), HYX-57, etc?) that uses the same case dimensions in addition to the KY-57. Like the PRC-25, PRC-77, TS-2963 and many other items use the same case size that's related to the BA-4386 battery and CY-2562/PRC-25 battery box, the KY-57 was designed to be used with a BA-5590 battery. It has 3 dogs to restrain the front panel whereas the MT-4626 (above) only uses one dog on the bottom center.
The rear of the MT-6429 has a box that looks like the HYP-57 Vehicle Power Adapter from the KY-57 end, but on the back has both a male (J1) and female (J2) 4 terminal military vehicle power connector. Because it uses the standard military vehicle 4 pin power connectors it may NOT meet the TEMPEST requirements needed for the KY-57. The HYP-57 and CX-130663 going to a J-Box should meet the TEMPEST requirements.
PIN TM/EM Number Current Change Publication Title (partial) 037985 TM 11-5810-312-34&P TM 11-5810-312-34&P Install Kits COMSEC Equip, TSEC/KY-57 051621 TM 11-5810-312-12-1 TM 11-5810-312-12-1 Install Kits COMSEC Equip, TSEC/KY-57, Vol 1 051764 TM 11-5810-312-12-2 TM 11-5810-312-12-2 Install Kits COMSEC Equip, TSEC-KY-57, Vol 2 (Install Kits Whld Vehs) 052322 TM 11-5810-312-12-3 TM 11-5810-312-12-3 Install Kits COMSEC Equip, TSEC/KY-57, Vol 3 (Install Kits Trkd Vehs) 053083 TM 11-5810-312-12-4 TM 11-5810-312-12-4 Install Kits COMSEC Equip, TSEC/KY-57, Vol 4 (Install Kits General Purpose Use And Shelter Applications)
Man-PackIn a man-pack system the KY-57 is carried below the PRC-77 on the LC-2 ALICE pack frame. Interconnected by the CX-12991 cable. The KY-57 would be powered from a BA-5590 or equivalent battery.
When used in a manpack configuration with the PRC-77 both units are mounted on an A.L.I.C.E. (All Purpose Individual Carrying Equipment) frame using two equipment shelves.
The ALICE equipment:
- Frame w/Belt & Shoulder straps NSN 8465-01-019-9103
- LC-2 Frame w/ straps NSN 8465 01 073 8326 Government only orders here
- 2 each LC-2 Shelves
- LC-2 Kidney Pad
- LC-2 Shoulder Strap Left NSN 8465-00-269-0482
- LC-2 Shoulder Strap Right NSN 8465-01-078-9282
VehicularA vehicular system that would start as a VRC-64 or GRC-160 then the J-3523 Junction box is added with a CX-13063 DC power cable connecting to the HYP-57 External Power Adapter instead of a battery for the KY-57. The MT-4625 holds the KY-57 near the PRC-77. The CX-13071 which is 4 Ft. 0 In. long, is probably the one for this configuration.
PS magazine issue 488 on page 45 is in error when it says that the CX-13071 is the GRC-160/64 cable, it's really the cable for use with the HYX-57 Wire Line Adapter and will not fit the KY-57.
ST-43 KY-57 Back to Back Test Set
ST-44 KY-58 Back to Back Test Set
ST-58 Automatic Test Equipment with Z-APA VINSON test adapter
USM-481 VINSON Interconnect Test Set
F91120 - Bit Error Rate Tester
FM 11-1 Talk II SINCGARS - Chapter 1 Equip & Ops -
FM 11-32 Chapt 9 - Info on HYX-57 use.
H-250 <U-229> KY-57 <CX-13072> HYX-57 <wire lin> HYX-57 -RadioFM 11-32 Appendix Suggested SOP for SINCGARS -
The HYX-57 just transfers the ciphered voice signal, it does no encrypting itself.
FM 24-18 App F - "NRI systems can be secured through the use of the Vinson secure equipment. (Secure wire line with KY-57s and HYX-57s.) Wire-line Adapter HYX-57 provides the interface for the KY-57 to a standard 2- or 4-wire transmission line, but it does not encrypt or decrypt. This is done by the KY-57. Distance between HYX-57s should be no greater than 16 kilometers (10 miles). If a secure wire line is required over a distance greater than 16 kilometers (10 miles), two HYX-57s can be placed back-to-back to double the range."
FM 11-32 Chapt 5 - The VINSON secure device has six preset positions-- five for the TEK and one for a key encryption key (KEK). The five TEK positions allow operation in five different secure networks. The KEK allows changing or updating the TEK through over-the-air (by radio transmission) fill.
FM 11-43 The Signal Leader's Guide - Key load procedure
FM 11-55 Apendix C Communications Security Operations KEK and TEK keys used with KY-57
FM 24-12 Coms in a "Come as you are" War -
FM 24-18 Apendix L TACTICAL SINGLE-CHANNEL SATELLITE COMMUNICATIONS
FM 24-19 Chapter 4 has instructions on using the KY-57 in manpack configurations. Using the KOI-18 paper tape reader for key fill. KYK-13 ( looks very similar to the MX-18290 for key fill.
All the TMs relating to the KY-57 are restricted access, in the "B" directory.TM 9 2370-280-24P ?
TM 11-5810-256-xx are the manuals relating to the KY-57.
The 256-OP-x series are 4" x 5.5" operation manuals specific to an application.
KY-57SB 11-700 INSTALLATION KITS FOR KY-57
TB 11-5810-256-14 COMSEC Equip, TSEC/KY-57
TM 11-5810-256-10-1 Net Controller Operating COMSEC Equip, KY-57
TM 11-5810-256-10-2 COMSEC Equip, KY-57 Manpack Config
TM 11-5810-256-12 COMSEC Equip, KY-57
TM 11-5810-256-30 COMSEC Equip, KY-57
TM 11-5810-256-OP-3 COMSEC Equip, TSEC/KY-57 In Wheeled Vehicles
TM 11-5810-256-OP-4 COMSEC Equip, TSEC/KY-57 In Tracked Vehicles
TM 11-5810-256-OP-5 COMSEC Equip, TSEC/KY-57 Retransmission
TM 11-5810-256-OP-6 COMSEC Equip, TSEC/KY-57 With HYX-57/TSEC FM Secure Remote Comms
TM 11-5810-256-OP-7 COMSEC Equip, TSEC/KY-57 With HYX-57/TSEC To Provide Point-To-Point Comms
TM 11-5810-312-34&P Install Kits COMSEC Equip, TSEC/KY-57
TM 11-5810-312-12-1 Install Kits COMSEC Equip, TSEC/KY-57, Vol 1
TM 11-5810-312-12-2 Install Kits COMSEC Equip, TSEC-KY-57, Vol 2 (Install Kits Whld Vehs)
TM 11-5810-312-12-3 Install Kits COMSEC Equip, TSEC/KY-57, Vol 3 (Install Kits Trkd Vehs)
Nov 15, 1982 no change
Supports radio sets:TM 11-5810-312-12-4 Install Kits COMSEC Equip, TSEC/KY-57, Vol 4 (Install Kits General Purpose Use And Shelter Applications)
VRC-12, -44, -45, -46, -47, -48, -49, -64
TM 11-5810-343-12&P-1 COMSEC Equip, KY-57, (Gen Installation Kit Info And Detailed Instructions)
TM 11-5810-343-12&P-2 Installation Kits, COMSEC Equip, KY-57 (Wheeled Vehicles) (COMSEC - for title see PAM 25-35)
TM 11-5810-343-12&P-3 COMSEC Equip, TSEC/KY-57, (Installation Kits Tracked Vehicles)
TM 11-5810-343-12&P-4 COMSEC Equip, TSEC/KY-57, Vol 4 (Installation Kits Shelter Applications)
TM 11-5810-343-34&P COMSEC Equip, TSEC/KY-57
TM 11-5810-256-34P Communications Security Equipment KY-57 (NSN 5810-00434-3644)
TM 11-5810-262-10 Speech Security Equip, KY-58
TM 11-5810-262-12 TSEC/KY-58
TM 11-5810-262-23 COMSEC Equip, TSEC/KY-58, Z-AHP, Z-AHQ
TM 11-5810-262-34P COMMUNICATIONS SPEECH SECURITY EQUIPMENT KY-58 (NSN 5810-00-449-0184) IDN 430880 PIN 037940
KOI-18TM 11-5810-292-13&P General Purpose Tape Reader, KOI-18; Elect Transfer Device, KYK-13; Net Control Device, KYX-15/15A
TM 11-5810-292-OP Comm Sec Equip TSEC/KY-57 (?58?)
MCO 2040.9 ST-59 Automatic Test Equipment, TM 11-5810-369-13&P, SAM-151 ST-58 Limited Maintenance Manual, SAM-150 ST-58 Theory and Full Maintenance Manual
NITFS Baseline Documents - JIEO 9137 Technical Interface Specification, National Imagery Transmission Format Standard, Tactical Communications Protocol (TACO2) to KY-57/58 Cryptographic Devices.
CSESD‑14G July 1984 Communications Security Equipment, System, Document for TSEC/KY‑57/58 (CONFIDENTIAL)
Fed-STD-1023 - data rates 8, 12 & 16 k bits per second
UNIT LEVEL COMMUNICATIONS MAINTAINER MOS 31V SKILL LEVEL 1 -
TM 11-5810-312-12-1MCO 1510.118 - MOS 0600, Basic Communications Information Systems Marine
Special purpose bypass cable CX-13100/U
15. TSEC/KY-57 INPUT POWER CIRCUIT.
a. Situation 7. When performing EPC step 40 (TSEC/KY-57 Input Power), the KY-57 power switch is turned to ON. The A-RT call lamp does not light and alarm beeps are not heard in the handset at J5. This symptom may be caused by no power to the KY-57. To confirm power, measure voltage 5.2 volts DC at the KY-57 (turned on) audio connector pin A to pin C (If KY-57 is turned OFF voltage measured at the audio connector pin A to C will be 30 volts DC). If no voltage is measured, the KY-57 input power circuit is bad. Tracing the KY-57 input power circuit identifies the following possible bad items of equipment: J-3513/U, CX-13061/U, CX-13063/U, HYP-57, and KY-57 (Figure 51).
When the KY-57 power switch is in the OFF position the handset connected to the KY-57 ADUIO connector is passed through to the RADIO handset connedtions so the A (gnd) to C (PTT) voltage will depend on the radios's PT bias.
When the KY-57 power switch is in the ON or TD positions the PTT bias comes from the KY-57 which needs BOTH the main power source AND a good HUB.
SS0728 - System Troubleshooting the Intercommunication Set AN/VIC-1(V) wiht Medium Power FM Radio and COMSEC Equipment (VINSON)
MCO 2231.1 Over-The-Air Rekeying (OTAR) Policy and Procedures
TB 380-40 (Classified) Key Variable Management and Crpytosetting for Electronically Keyed COMSEC Systems (U)
1995 Issue 512 page 43
"Get the Right Cable"
Again an article with typos. The CX-13071/U is said to not connect to the PRC-77, but it was designed to and works fine.
Then it says not to connect a CX-13061/U cable to a PRC-77.
1995 Issue 511 page 35
"Dumbells Save Dollars"
By cutting the dust cover for a PRC-25 or PRC-77 (NSN 5340-00-973-1732) in half you spend about 50 cents each instead of the $7.86 for the "proper one".
1995 Issue 510 page 43
"Tighten Your Collar"
the CX-12991 collar comes loose and can damage wires. Keep it tight.
(BC) Maybe a drop of Locktite would be good?
1993 Issue 488 page 45
"Grab the Right Cable"
Article is in error. It says that the GRC-160/64 cable is the CX-13071, but that cable is for the HYX-57 Wire Line Adapter and not the GRC-160/64. What is the correct GRC-160/64 cable?
"Piece Parts Guide"
Battery BA-3590 -> may be a type for BA-5590
Battery Box -> Z-AIJ NSN 5810-01-048-8167
Knob, Fill slot & Power -> NSN 5355-01-059-1701
Knob, Volume -> NSN 5355-01-055-6230
Spline wrench -> NSN 5120-00-293-0195
Dust Cover, Radio connector -> NSN 5810-01-054-6833
Dust cover, fill and audio connectors -> 5810-01-054-6829
1990 Issue 451 page 45
"Fill Cables Saves Connectors"
Use fill cable NSN 5810-01-066-7587, every time you connect your fill devices, such as a KYX-15/15A, KYK-13 or KOI-18, to one another or to any COMSEC equipment. If you try to make a direct hookup between two fill devices, or between the COMSEC equipment and a fill device, you can bend or break pins in the connectors. Then you won't be able to encrypt or decrypt you message.1990 Issue 451 page 42 & 43
Don't spit to lubricate the O-rings.
"Strap'em Into LC-2 Frame"
Using 2 Cargo Shelfs (NSN 8465-00-001-6476) and 4 Cargo tiedown straps (NSN-00-001-6477) (2 straps for the PRC-77 and 2 straps for the KY-57) on the LC-2 pack frame (NSN 8465-01-073-8326)
B.C. Note: Using the LC-2 A.L.I.C.E. pack frame is probably an improvement on the ST-138 that put all the radio weight on you shoulders. The pack frame can be adjusted to put most of the weight on your hips.
The plain text voice signal is first digitized using the Continuously Variable Slope Delta (CVSD) method to change an analog voice into a digital signal. Then this digital signal is mixed with another digital data stream that comes from the selected key (1 through 6).
At the start of each transmission the KY-57 generates three simultaneous audio tones (1075, 2155 & 3225 Hz) as part of the synchronization process.
switch under red cover
SW: C/RAD 1, PLAIN, C/RAD 2
Sw: 1, 2, 3, 4, 5, 6
Sw: Mode OP, LD, RV
Sw: PWR, ON
P, C, LO, PV
Sw:Fill 1-5, Z, 1, 2, 3, 4, 5 Z All
OFF, ON, TD
Label Spaces for 1, 2, 3, 4, 5, 6 and Bat Inst
J1 male circular connector
J2 male circular connector
J3 6-pin AUDIO/FILL connector
J100 Huge "D" type connector 4 rows x 30+ pins/row
A replica KY-57 could be built that would be the same size and have the same connectors so could be cabled into a radio system.
One version would be a single box the same size as the KY-57 with the HYP-57 attached and with real connectors for the KY-57 RADio and AUDIO ports and for the HYP-57 power input port, but empty inside. It would fit the MT-4626 mount or would be strapped onto an LC-2 frame with a PRC-77. It could be cabled into any of the VRC-12 series vehicular radio systems.
Another version would have no crypto capability, but might have a codec to convert voice to a digital data stream, similar to what's done in the TA-1042 telephone. This might be done using the CMX639 (or CMX649) codec chip.
If interested please let me know.
Monitoring Utility Stations - Voice encryption systems, VOCODERS - Sounds of various systems
F. W. Chesson - COMMUNICATIONS SECURITY and Related EQUIPMENT -
Crypto Equipment Guide -
National Counter Intelligence Executive - foreign economic collection and industrial espionage -
WINDSTER STANDARD EMBEDDABLE MODULE
WINDSTER consists of a PC board containing several custom LSIs and discrete devices. This module incorporates the SAVILLE I and PADSTONE algorithms to provide security for classified traffic. It also contains the CORDOBA algorithm which provides security for sensitive unclassified traffic. The CORDOBA provides interoperability with many inventory SAVILLE-based equipment. WINDSTER is a 500 Kbps full/half duplex embeddable COMSEC module used to secure digital voice or data traffic. It provides cryptographic interoperable traffic operation with KY-57/58, E-DRZ, KYV-2, KYV-5, KG-84, RAILMAN, INDICTOR, and STU-III. It also provides re-key operations interoperable with the KY-57/58, KYV-5, INDICTOR, and RAILMAN equipment.
This embeddable module may be used with various voice/data equipment such as mobile or desk top telephones, modems, or man-pack radios. It is approved for use at all classification levels. The authorized vendor is Harris, RF Communications. The approximate cost is $2700 each for quantities of 1 to 249 and $1600 each for quantities over 250.
The Michael Kelley Gulf War Collection Finding Aid - Box 18 - Technical Manual, Net Controller Operating Procedures for Communications Security Equipment, (TSEC/KY-57), January 1984
Effects of Tandeming on Voice Quality and Intelligibility - CVSD at 16Kbps - w/ sound sample files
The U.S. Department of Defense Digital Voice Processor Consortium -
Battery Information for COMSEC Equipment -
Bendix Radio Programs over Time -
A lot of Secure Telephone Units -
EKMS (Electronic Key Management System) Army, Navy,
PS Magazine - ALICE LC-2 Pack NSNs -
Warfighters Clothing Support Page -
Harris - Products -Embeddable Security Products - Sierra module -Type 1 - Cryptographic Algorithms: BATON/MEDLEY, SAVILLE/PADSTONE, KEESEE/CRAYON/WALBURN, GOODSPEED, ACCORDION, FIREFLY/Enhanced FIREFLY, JOSEKI Decrypt, plus other types.
FAS - Cryptographic and Security Programs and Systems - TEMPEST -
Digital Modes Samples - you can hear the startup tones on the KY-57 sound bite
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