These intercoms are part of my interest in military audio devices.
The LS-147(*)/FI provides two-way audio communications between two or more points. The LS-147(*)/FI may be used in an intercommunication system for a maximum of seven shelters or offices. All stations are connected in parallel to a single pair of wire.
Install the LS-147F/FI at the location where it is to be operated. The unit may be wall or shelf-mounted, or one end may be mounted on a wall and the other end on a shelf.
Fig 1 Shipping Box
Fig 2 Front w/TM 11-5830-256-13
Fig 3 Back
For Testing terminate Binding posts with 10 Ohm (10%) 5 Watt Resistor.
Fig 4 Inside
Power Supply Board 4 test points top to bottom A, B, C, D
A - D = 60 +/- VDC
B - C = 45 +/- 4 VAC
Warning: it's easy to blow the FM02 3/4A fuse when
probing these test points!
FuseLittle Fuse (LF) FM02 3/4A Digi-Key p/n: F866-ND Little Fuse 0273.750H
0.025" pin O.D.
0.100" pin Center to Center
You can make a "U" shaped jumper (which has no fuse protection) using common 22 AWG hookup wire with the insulation left on the bottom of the "U" so it will not short to the cap.
I've done this to allow measuring the actual current on the AC line and hopefully an find a resettable fuse that will replace the function of this very hard to get fuse. The lack of a readily available fuse may be why these intercoms are on the surplus market. If you know about this tell me. Note: Unlike most military equipment that has a fuse this box does not have a spare fuse.
Yes 3-prong Push
TM 11-5830-221-12 Operator's and Organizational Maintenance Manual Intercommunication Stations
LS-147A/Fl FSN 5830-222-1661 - Volume Control, Press to Talk
LS-147B/Fl FSN 5830-681-8616 - Volume Control, Press to Talk
LS-147C/Fl FSN 5830-752-5257 - Rx Vol, PTT, Pilot Ligh (above), Tx Vol
LS-147D/Fl FSN 5830-752-5355 - Rx Vol, PTT, Tx Vol (grouped) Pilot Light (above)
5 June 1961 Change 1; Change 2: 11 Dec 1973; Change 3 14 Sep 1979;
This manual supersedes TM 11-5830-221-12, 7 December 1959.
TM 11-5830-221-24P Organizational, Direct Support, and General Support Maintenance Repair Parts and Special Tools Lists forTM 11-5830-221-35 Field and Depot Maintenance Manual, Intercommunication Stations:
Telecommunication Station LS-147C/Fl (NSN 5830-00-752-5357
27 May 1977
TM 11-5830-256-13 Operator's, Unit, and Intermediate Direct Support Maintenance Manual Intercommunication Station LS-147F/FI (NSN 5830-01-008-3126)
1 Nov 1986; Change 1 1 Jan 1988;
TM 11-5830-256-23P Organizational and Direct Support Maintenance Repair Parts and Special Tools List
(Including Depot Maintenance Repair Parts and Special Tools) for Intercommunication Station LS-147F/Fl
(NSN 5830-01-008-3126) 15 DECEMBER 1988
Audio Connectors & Military Cloning - Fill - Retransmission
Beltone 12D Audiometer
HP 204 Audio Oscillator from HP 3350 Carrier Test Set (AN/USM-181 Telephone Test Set
HP 241A Audio Oscillator w/Radio ButtonsLS-454 LS-454/U Loudspeaker
LS-685/U Crystal Loudspeaker
MAA Military Audio Accessories
Audio Patch Panel
Signal Design, Inc. 65630 Audio Recorder RD-609/TSQ-164 Communications Recorder
TS-585 Audio Level Meter
U-229 Audio Accessories
U-229 Pin Out by Function
Brooke's PRC68, Index of Web Pages, Contact, Products for Sale, Military Information, Electronics
page created Aug. 10, 2014.