US Navy Teletype Loop Supplies

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• Navy TTY manual list - including download links
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PP-424/U Loop Supply

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By maintaining proper switch positions in the TT-23( )/SG teletype panel, overloading of the power supply may be avoided.

The following condition is presented as an example: A ship is equipped with a carrier frequency shift receiver and tone modulated send-and-receive teletype system, which consists of two teletypewriters and the associated terminal set and the converter-comparator group. In installing this system, the converter-comparator group is connected to three loops and the tone terminal equipment is connected to one loop. The remaining two loops of the TT-23( )/SG may or may not be strapped.

When both systems are in operation, two loops will normally be operating, thereby requiring a total of 120 milliamperes. Each loop requires 60 milliamperes for efficient operation. In this arrangement, there is one PP-424/U power supply unit which has a rated output of 200 milliamperes. (In some installations an additional PP-424/U unit is provided as an emergency power supply.)
In setting up the TT-23( )/SG for the above condition of operation, the toggle switches of the two loops being used should be in the local current (LOC. CUR.) position and the other loops not being used should be in the external current (EXT. CUR.) position.

Overloading of the PP-424/U power supply unit will occur if four or more loops draw current, and each loop will draw current if the toggle switch is in the LOC. CUR. position.

PP-610/U Loop Supply 

PP-765/U Loop Supply
PP-765A/U

123 lbs!

Manuf - Power Equipment Co.

NAVSHIPS 91557

PP-987/U Tape Relay Equipment Supply

PP-987 pages from AN/FGC-38 manual

PP-1010/UG Loop Supply

PP-1011/UG Loop Supply

Please let me know if you have one of these for sale or trade

PP-1479/FGC Supply

PP-1646/UG Loop Supply
PP-1646A/UG
PP-1646B/UG

Please let me know if you have one of these for sale or trade

PP-1767/UG Loop Supply

1 ea. 120vdc (1 amp) output
2 ea. 60 ma loop outputs
1 ea. 6vac output

Looking for a manual - please send email if you can help

PP-1767A/UG
PP-1767B/UG Loop Supply

1 ea. 120vdc (1 amp) output
2 ea. 60 ma loop outputs
1 ea. 6vac output

Magnetic amp regulation.

40 lbs (!)

PP-1767A Manuf by Digital Electronics Inc

1767B - NAVSHIPS 0967-299-3010
download 1MB pdf

PP-2232/U Loop Supply
PP-3096/U Loop Supply

Please let me know if you have one of these for sale or trade

PP-3054/UGC Loop Supply

Tabet Mfg. Co. Inc..

NAVSHIPS 94169
download 1.3MB pdf

PP-3494/UG Loop Supply
PP-3494A/UG

PP-3494A/UG manual 
    - NAVSHIPS 94971

PP-3495()/UG  Loop Supply

PP-3495A/UG Loop Supply

Same as PP-3494() except 1A.

PP-6521/FGC low-level TTY power supplies

More info in NAVSHIPS 0967-391-6010

download 38 MB pdf