This is a small (10 x 5-1/4 x 4-1/4") and light weight (7.5 pounds) HF transceiver that can work manual CW, high speed CW using the optional GRA-71 or AM voice. The frequency coverage is compatible with Near Vertical Incidence Skywave (NVIS) propagation, but not other DX modes, i.e. about 2 to 8 MHz. Since the RF power ouput is low (5W Cw, 1.5W AM) an externall wire antenna that's tuned to the frequency of operation is needed for long range operation.
The PRC-64 (Delco 5300) has some similarities to the GRC-109. Both are low power man portable NVIS HF radios.
The PRC-64 & Delco 5300 both have a 4 channel crystal controlled receiver and a 4 channel crystal controlled transmitter, so 8 crystals are required to populate all four channels.
This unit came from eBay and includes two main chassis assemblies, but not the round head black 4-40 x 3/8" panel mount screws.
Pan head 4-40 x 3/8" screws on order.
One of the main chassis has broken wires.
Included with the radio is a photo copy of the Delco 5300 manual. I'm not sure about what the differences are between the PRC-64 and Delco 5300 radios.
The 5300A covers 3.0 to 8.0 MHz and the PRC-64 covers 2.2 to 6.0 MHz.
Radio Set AN/PRC-64
2.2/6.0 Mc Serial 1094
Delco Radio Div. G.M.C
Stock No. (blank)
Australian Army 1965
Fig 1 Closed Box
Fig 2 Open Box
Fig 3 Front Panel (chassis removed from box)
Fig 4 Front bottom
Fig 5 Top bottom
Fig 6 back inside
There is a compartment on the front panel for a battery supplying 4, 12 and 28 Volts. The BA-1000 series batteries contained Mercury and are long gone.
1-19/32 x 4-5/8 x 4-5/16" and uses a Cinch No. 13649 socket (also used on the BA-48 used with the GRC-109, or the BA-399 used with the PRT-4)
Tube Radio: Making a BA-1509 for a PRC-64 -
The pair of earphones each use common 1/8" phone plugs as does the dynamic microphone.
The connector for the GRA-71 is wired as follows:
B & H
+12 V C
H & B
Note pins A & C & F are tied together.
AS2259 NVIS Antenna and NVIS in General
BC-611 SCR-536 HF Radio set Signal Corps
Cubic R-3030 Dual VLF-HF Receiver
AN/GRA-50 Antenna, HF NVIS Dipole w/reels at the ends
AN/GRC-109 HF Set (Spy, Special Forces)
ICOM 706 Transceiver
Micom 2 HF Radio, Motorola Mobat vehicle or base HF radio
NRD545 - NRD545 General Coverage HF Receiver & Related
PRC-104 HF Receiver Transmitter man portable, but much larger and heavier than the PRC-64
RT-1694/PRC-138 HF Receiver-Transmitter - man portable, but much larger and heavier than the PRC-64
PRC47 HF tranceiver - 2 man lugable HF radio, but similar in application
PRD1 HF Direction Finding Radio jeep mounted
RF3200ET Harris RF-3200ET Portable Transceiver - suitcase size
SORAK Special Operations Radio Antenna Kit OE-452/PRC Five Configurations HF through VHF coverage
TW100F/AT Transworld Datron Fly Away H.F. Radio - suitcase size
Wire Antennas - mainly about Camouflage Netting Mast Kits, including antenna line launchers CSV17 Tennis ball and EZ-Hang Slingshot, TCI 651T
https://www.cia.gov/library/readingroom/docs/CIA-RDP78-05462A000100020005-8.pdf - Agenda Equipment Board, 10 March 1965 - Mostly about the RS-100 replacement for the RS-1 (GRC-109)
"...the RS-69 (former AN/PRC-64), which is due soon,..."
"Special Forces is holding out for the AN/PRC-70 which is not due until 1970, saing that they will use the AN/GRC-109 (RS-1) as an interium set until then, fearing that if they go for another set on the basis that it is also an interim set, they will never get the AN/PRC-70.
Army Radio Sales - Delco PRC-64 Battery Adapter -
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page created 15 Oct 2013.