[Milsurplus] SCR-300 Aircraft Radio

[Hue Miller]

You can use the SCR-300 in your L-5 aircraft with an installation which is much
improved over the improvised take-along methodes used heretofore. The secret
is separating the battery supply from the radio by about ten feet and mounting 
the radio on rubber belts from below the aircraft's own  receiver. The battery and
its case is strapped just aft of the plane's camera mount. The SCR-300 is attached
by four 1 inch wide L brackets to the shockmount of the plane's AVR-20 receiver
above,  gaining insulation from vibration. This pictured aircraft does not carry
a transmitter; only the AVR-20 receiver, and beside it the Setchell-Carslon ARR-13
LF receiver. It has been found that a vertical whip antenna offers longer range
and also less directionality than the aircraft's V wire antenna.  This equipment 
allows the aircraft to work with units - rifle companies for instance - which the 
usual aircraft equipment does not allow.  Over normally flat terrain an altitude
of only 400 feet is required to maintain communications over 20 to 30 miles.
At 6000 feet, this increases to 60 miles with loud and clear communication.
This suggestion from Lt. Chester R. Meade, published by Infantry School 
Quarterly,  Jan. 1951. The Quarterly expects to publish a similar installation
guidance for new planes when the new PRC-10 is available. 

via: Hue Miller