Difference between revisions of "BC-611"
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==Tuning== | ==Tuning== | ||
| − | Tuning is accomplished by means of two separate | + | Tuning is accomplished by means of two separate crystals an antenna coil, and a tank coil. The receive crystal frequencies are 455 kHz above the desired frequency. for example a crystal frequency of 4340 will give you a receive frequency of 3885 kHz. Often the receive crystals for the BC-611 will have the crystal frequency on the front and the actual receive frequency on the back. |
[[File:BC-611-Crystals.jpg|400px]] | [[File:BC-611-Crystals.jpg|400px]] | ||
| − | BC-611 | + | BC-611 receive crystals show the crystal frequency and the receive frequency on the back |
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Tuning Coil | Tuning Coil | ||
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| + | ==MWO (Maintenance Work Orders== | ||
| + | ;MWO SIG 11-235-2 | ||
| + | :Requires an antenna insulator to be installed near the top of the antenna inside the case to prevent the antenna from moving and grounding to the case. | ||
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==Related Files== | ==Related Files== | ||
Revision as of 07:24, 17 March 2015
Radio Set SCR-536 is a very compact receiver - transmitter resembling an oversize telephone hand set. Complete with batteries, antenna, transmitter, receiver - and handset in one case. The BC-611 is a handheld radio commonly known as the first "walkie talkie"
Contents
Specifications
- Frequency Range
- 3.5 - 6.0 mHz
- Modulation Type
- AM
- Number of Crystals
- One transmitter and one receiving crystal required per channel
- Preset Frequencies
- One preset Channel Provided
- Antenna
- 44 Inch whip antenna - telescopes into set box, receiver is turned on when the antenna is extended
- Tuning
- Crystal
- Power Source
- Self contained dry batteries
- Power Output
- .027 Watts
Images
Removal From the Case
To remove the circuits from the case for service"
- Open the bottom cover
- Unplug the mic and speaker wires
- Unscrew the top screw
- Pull the radio out from the bottom.
Reinstallation in the Case
When reinserting the radio into the case, take care to align the radio on the guide slots. (see images below)
Tuning
Tuning is accomplished by means of two separate crystals an antenna coil, and a tank coil. The receive crystal frequencies are 455 kHz above the desired frequency. for example a crystal frequency of 4340 will give you a receive frequency of 3885 kHz. Often the receive crystals for the BC-611 will have the crystal frequency on the front and the actual receive frequency on the back.
BC-611 receive crystals show the crystal frequency and the receive frequency on the back
© 2014 Army Radio Sales Company, Used with Permission
FT-243 Tuning Crystals and antenna coils are stored in {CASEID NEEDED}
The transmit frequency can be seen through the case
Receive and Transmit Crystals
Tuning Coil
MWO (Maintenance Work Orders
- MWO SIG 11-235-2
- Requires an antenna insulator to be installed near the top of the antenna inside the case to prevent the antenna from moving and grounding to the case.
Related Files
- Radio Sets
- SCR-536-A, -B, -C, -D, -E, -F
- May 1945
TM 11-4019[1]- Radio Receiver and Transmitters
- BC-611-A, -B, -C, -D, -E and -F
- Repair Instructions
- July 1945
- Schematic Diagrams for Maintenance of Ground Radio Communication Set
- October 1942
References
- ↑ TM 11-4019,
- "US Army Technical Manual Collection,"
- from the CECOM Historical Office archive, Aberdeen Proving Ground, MD.
- CECOM Historical Office
- "US Army Technical Manual Collection,"