AN/PDR-27G and AN/PDR-27R RADIAC Meters

AN/PDR-27G

The AN/PDR-27G is a member of the first generation of AN/PDR-27 RADIAC meters that is comprised of the AN/PDR-27 through AN/PDR-27H. It runs on two 1½ volt cells, one 22½ volt battery and two 67½ volt batteries. In later years, a special transistorized power supply, the PP-4814/PDR-27C, became available that allowed the units to be operated from five standard "D" cells. This power supply is documented in NAVSHIPS 0967-283-6010.

AN/PDR-27R

The AN/PDR-27R is the third generation of the AN/PDR-27 RADIAC meter series. It runs on six standard "D" cells and was the first fully transistorized unit in the AN/PDR-27 series.

Headphones

The original H-43/U headphones are hard to come by and are very uncomfortable. The newer H-43B/U headset appears occasionally on eBay as surplus but they tend to run in the US$30 range. This is a picture of a pair of H-43B/U headphones that were acquired on eBay for a lot less due to a damaged cable that I repaired:

If you have a pair of H-43B/U headphones that did not come with cushions, like those pictured above, a pair of military surplus MX-41/AR cushions will fit and make the headphones much more comfortable to wear. This is a picture of the H-43B/U headphones above fitted with MX-41/AR cushions:

Since the audio output of the AN/PDR-27(*) series is high impedance, just about any high impedance headphones should work fine with an adapter. In the following pictures, I have a pair of 600 Ohm Telex model 610 headphones along with a 1/4" audio jack to BNC plug adapter that I made using a BNC plug, a short length of RG-58 coax cable and a RadioShack #274-340 1/4" inline jack. The headphones are inexpensive, comfortable and work fine with the AN/PDR-27G and AN/PDR-27R. For those who do not wish to build an adapter, the Pomona 4043 adapter should work though it is a bit pricey and will most likely cost more than a set of H-43B/U headphones.

Manuals

• TM 11-6665-230-12	AN/PDR-27R OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL
• TM 11-6665-230-12HR	AN/PDR-27R HAND RECEIPT
• TM 11-6665-230-20P	AN/PDR-27R ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
• TM 11-6665-230-34	AN/PDR-27R DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
• TM 11-6665-230-40P	AN/PDR-27R GENERAL SUPPORT, MAINTENANCE, REPAIR PARTS AND SPECIAL TOOLS LISTS
• TM 11-6665-228-15*	AN/PDR-27G OPERATOR'S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT, AND DEPOT MAINTENANCE
• TM 11-6665-228-20P	AN/PDR-27G ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
• TM 11-6665-228-40P	AN/PDR-27G GENERAL SUPPORT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
• NAVSHIPS 92071	INSTRUCTION BOOK FOR RADIAC SET AN/PDR-27G AND RADIAC DEMONSTRATION TRAINER AN/PDR-27-T1A
• NAVSHIPS 0967-283-6010	SUPPLEMENTARY TECHNICAL MANUAL FOR AN/PDR-27CXX, AN/PDR-27DX, AN/PDR-27EX, AN/PDR-27FX, AN/PDR-27GX, AN/PDR-27HX
• NAVSHIPS 0967-896-5030*	2-AN/PDR-27G FIELD CHANGE BULLETIN
• TM 11-6665-209-10	AN/PDR-27J, AN/PDR-27L AND AN/PDR-27Q OPERATOR'S MANUAL
• TM 11-6665-209-10HR	AN/PDR-27J, AN/PDR-27L AND AN/PDR-27Q HAND RECEIPT
• TM 11-6665-209-20	AN/PDR-27J, AN/PDR-27L AND AN/PDR-27Q ORGANIZATIONAL MAINTENANCE MANUAL
• TM 11-6665-209-40	AN/PDR-27J, AN/PDR-27L AND AN/PDR-27Q GENERAL SUPPORT AND MAINTENANCE MANUAL
• TM 11-6665-224-15	AN/PDR-27P ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT, AND DEPOT MAINTENANCE
• TM 11-6665-224-20P	AN/PDR-27P ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
• TM 11-6665-224-40P	AN/PDR-27P GENERAL SUPPORT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
• TM 11-6665-227-12	AN/UDM-2 OPERATOR'S AND ORGANIZATIONAL MAINTENANCE MANUAL
• TM 11-6665-361-10	OPERATOR'S MANUAL FOR RADIOACTIVE TEST SAMPLE, KRYPTON 85, GAMMA, MX-7338/PDR-27
• TM 11-5965-247-12P*	OPERATOR AND ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST AND MAINTENANCE ALLOCATION CHART, HEADSET, ELECTRICAL H-43B/U
• TM 11-5965-247-35P*	FIELD AND DEPOT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST, HEADSET-ELECTRICAL H-43B/U
• TM 55-315	TRANSPORTABILITY GUIDANCE FOR SAFE TRANSPORT OF RADIOACTIVE MATERIALS
• TB 9-6665-285-15	ARMY CALIBRATION PROGRAM FOR RADIAC INSTRUMENTATION
• MIL-STD-196E	DEPARTMENT OF DEFENSE STANDARD PRACTICE - JOINT ELECTRONICS TYPE DESIGNATION SYSTEM
* I am looking for either PDF (preferred) or hardcopy versions of these manuals (provided they are not restricted) and would be willing to trade. Please contact me at the email address below if you have any of these.

robert (at) Schaffrath (dot) net

Last modified September 3, 2010