[Lone Sentry: Jap Type P3A Radio Described, WWII Tactical and Technical Trends]
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"Jap Type P3A Radio Described" from Tactical and Technical Trends

The following intelligence report on the Japanese Type P3A radio was originally published in Tactical and Technical Trends, No. 1, June 18, 1942.

[DISCLAIMER: The following text is taken from the U.S. War Department publication Tactical and Technical Trends. As with all wartime intelligence information, data may be incomplete or inaccurate. No attempt has been made to update or correct the text. Any views or opinions expressed do not necessarily represent those of the website.]


Following is a description of the Japanese Type P3A radio set:

The transmitter has a single valve oscillator/amplifier using type valve UY 510 B. The power supply is obtained from a hand driven generator giving 500 volts high voltage and 7.5 volts low voltage. The approximate valve dissipation is 25 watts.

The wave range follows:

 400 --  580 Kcs.)
 580 -- 1000 Kcs.)
1000 -- 2000 Kcs.)   Each range has a set of plug-in coils. 
2000 -- 3000 Kcs.)
3000 -- 5700 Kcs.)

The set is crystal controlled. Three crystals come with the set -- 2960, 3283, 5550 Kcs.

Rod aerials are not used. A simple type aerial with metal mast sections is employed.

A built-in key is used, with an extension key breaking the negative lead. The general performance is good, and the components and finish are excellent.

The receiver has a 5-valve superhet - high frequency Mixer, Intermediate frequency detector and pentholde low frequency, with regenerator on the high frequency stage.

The power supply is derived from dry batteries both for high voltage and low voltage. The high voltage is 90 tapped at 67.5, and the low voltage 3.

Following is the wave range:

 350 --  625 Kcs.)
 625 -- 1100 Kcs.)
1100 -- 1950 Kcs.)   Each range with a set of plug-in coils.
1950 -- 3450 Kcs.)
3450 -- 6000 Kcs.)

Two pair headphones are supplied with the set. The operation is simple and the performance good.

(M/A Report, London, No. 48097)


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