BC-1206 Range Receiver

BC-1206 Range Receiver

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General Description

The BC-1206 is a superhetrodyne receiver covering the 200-400 Kc beacon band. The name Range Receiver comes from the fact that marker beacon information from navigational points on aircraft tracks gave information that provided approximate position. Unlike the radio compass receivers, no provision was made for direction finding.

There are various versions of this receiver, produced by different manufacturers. There are considerable differences between models, including major valve variations and differences in IF frequency. External connections and controls are identical.

Technical Data

The display model is the Setchell Carlson "C" model, which is fitted with 14 and 28 series valves - 14A7 RF, 14J7 Osc/Mix, 14A7 IF, 14R7 Det/Af and 28D7 Output. The IF frequency is 135 Kc.

The BC-1206A was manufactured by Detrola and used a 6K7 RF, 6SA7 Osc/Mix, 6SK7 IF, 6SQ7 Det/Audio and 28D7 Output. The IF frequency is 142.5 Kc

The radio is very small, with the front panel being 4" square and the radio being 6 5/8" deep. The set mounted directly on the instrument panel in the cockpit of the plane.

The receiver was designed to operate entirely off the 28v aircraft battery supply - hence both LT and HT is 28 vdc.

The set is designed for a very short antenna, with provision being made for high (4000 ohm) or low (300 ohm) impedance headphones. Input sensitivity is 5 micro-volts, with power output of 300 milli-watts.

Overall current drain at 24vdc is quoted at 0.75 A.

Illustrations of the set

BC1206 Top view BC1206 Underside

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© Ian O'Toole, 2009. Page created: 28/04/03 Last updated: 4/12/2009