[ARC5] ARR-2 (ZBX) vs ARR-1/ZB/ZB-1/ZB-2/ZB-3

[Michael Hanz]

I have just finished going page by page through both

NAVAER 08-5Q-261 dated 1 May 1944 (Handbook of Operating Instructions 
for Aircraft Radio Receiving Equipments AN/ARR-2, AN-ARR-2X, AN-ARR-2A, 
and AN-ARR-2AX), and
NAVAER CO-AN-08-25E-1 dated 30 Sept 1943 (Handbook of Maintenance 
Instructions for Aircraft Radio Receiving Equipments AN/ARR-2 and 
AN-ARR-2X).

In _neither_ of them is there mention of a ZBX.   Here is the 
description of the X suffix in the later manual:


  As I understand Jan's question, he has a F6F-3/-5 Hellcat manual, 
which lists the ZB as an "adapter", and the ZBX as a stand-alone 
installation involving a receiver:



It refers to a figure 41, which picture has no navigation receiver in it 
whatsoever - just control boxes.  The only box remotely related is a 
C-27/ARC-5.  I have a feeling that this mention was perhaps a artifact 
of local Grumman shorthand left over from the old ZB-* days.  The F6F-3 
had a 24 volt 11 amp battery, so using the -X suffix to reflect a 14 
volt AN/ARR-2 doesn't make any sense.

- Mike  KC4TOS


On 3/22/2024 3:06 PM, MARK DORNEY via ARC5 wrote:
> The electronics pictured are not quite in the process of being 
> restored yet, and are minus any accessories. On the left is an 
> AN/ARR-2 (ZBX) navigation radio with the ZB homing device built into 
> it. On the right is a ZB-1 homing device. The AN/ARR-1, ZB, ZB-2 and 
> ZB-3 are almost identical to the ZB-1, with the ZB and the ZB-1 having 
> different coaxial connectors on the rear of the device (not pictured). 
> The ARR-1 /ZB “Adapters” are better described as a “demodulators” in 
> that they demodulated a scrambled signal hidden inside the carrier 
> wave of another frequency into CW that (normally) the pilot of the USN 
> receiving aircraft would hear, and using a decode card issued to him 
> just before flight, giving him the code letters for and the bearing to 
> the sending transmitter ( an aircraft carrier or NAS ). The ARR-2 was 
> a receiver coupled with a ZB demodulator coupled with a demodulator 
> and switching gear all together in one electronic device.
> 73
>
> Mark D.
> WW2RDO
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