D11/R230 Station Specifications

Functions

Station Radio D11/R230  fitted into Cabins Radio, Air Transportable Type B is a medium power HF installation.

Systems

Voice : SSB (R3E), ISB (B8E), DSB (A3E).
CW:      (A1A).
FST:      (F1A) simplex or duplex
Max Keying speeds (bauds) –
D11 : 200, R230 : 75.
Frequency shifts , Transmitter : 280, 400 560 or 850Hz
Receiver :       280, 400 or 850 Hz.

Frequency Range

D13 – 2.0 MHz to 22 MHz. Tunes to 1KHz integers only and has high stability oscillator (+/- 120Hz)
R230 – 2.1 to 27 Mhz
IF1 – 1-2 MHz variable
IF2 – 100 kHz
Free tuning (effectively) with crystal check points at 10 kHz and 100 kHz intervals
AFC to 20 Hz residual.
FST tone – 2.5 kHz.

Transmitter Output Power

SSB/ISB – 300 to 350W PEP
CW – 300 to 350W
FST – 215 to 250W
DSB – 85 to 100W
All outputs slightly reduced above 15MHz

Antennas and Range

8m (27ft) to 13m(42ft) rod (static) up to 160km
End-fed or dipole (skywave) up to 800km
Sloping V (or rhombic) antennas may also be used for increased field strength or greater ranges.

 

Detail taken from Royal Signals Reference Manual, Part 2, Equipment Data – revised 1986.

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