Korean War era Portables

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DELCO 5300 & AN/PRC-64







Delco 5300 A and AN/PRC-64:

  Delco 5300 A (Serial No: 24)

is a Spy Radio, like its predecessor GRC-109 : It was developed from DELCO for the CIA and has a very compact size.

It works from 3.0 to 8.0 MHZ.

The solid state radio has a watertight housing , the operational elements, however, are not watertight.
It is switched on by opening the lid. A Morse key is built in; it operates a microswitch below the front panel.

Transmitter and receiver have separated crystals of the CR-78/U- type, four channels can be switched separately for the transmitter as well as for the receiver. The antenna is tuned with the help of a small bulb, a whisper- function can be switched on.

It can be operated in CW and AM modes, AM being not common for a spy radio. Though solid state, small and battery operated, it is no portable radio, because it uses wire antennas.

Frequency range:
Channel 1:  3.0 ... 3.9 MHz
Channel 2:  3.8 ... 4.9 MHz
Channel 3:  4.8 ... 6.3 MHz
Channel 4:  6.2 ... 8.0 MHz


was developed from the DELCO 5300 A for the US Army. Except the frequency range, the technical data are the same as the data of the DELCO 5300 A.

It works from 2.2 ... 6.0 MHz

It was developed in the USA, but was used in great numbers by Australia and its allies during the Vietnam War period.

All PRC-64 are said to be modified to the improved model PRC-64A (for use of a burst code keyer GRA-71), but unmodified radios still can be found.

Frequency range:
Channel 1:  2.2 ... 2.85 MHz
Channel 2:  2.8 ... 3.65 MHz
Channel 3:  3.6 ... 4.7 MHz
Channel 4:  4.6 ... 6.0 MHz

Visible differences (also see the Picture gallery):

Delco 5300
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  • Delco 5300A has no name on the outside, AN/PRC-64 has.
  • Delco 5300A mentiones 5 antenna lenghts, AN/PRC-64 mentiones 7.
  • Delco 5300A has the serial number printed on the front panel;
       AN/PRC-64 has a nameplate (missing here).
  • Connectors for ANT and GND are different.
  • Batterytest-knob and -bulb changed their places.

  • (The version Delco 5300 -not in the collection- has no bandwidth-
       switch for the receiver)


    Technical data:
    4 for transmitter as well as receiver, crystal controlled
    CW, AM
    HF output:
    CW: 5W; AM: 1.5 W
    CW: 2 µV
    AM: 5 µV
    CW- speed:
    up to 300 wpm with burst code keyer GRA-71
    BA-1509/Prc64: 4V, 12V, 24V
    Date of issue: