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

[zakariya.abu at yandex.com]

Hi Mark,

Thank you for the reply and the differences description between each ZB 
set. So, I assume that the ZBX was the AN/ARR-2, the stand-alone set 
with embedded receiver.

I got interested in the matter since the ZBX was installed in the five 
Flight 19 Avengers that went missing off Florida on Dec. 5, 1945. 
According to the Navy's report, the Flight 19 ZBX sets were set to the 
600 kHz modulation frequency. That would be channel #5 on the AN/ARR-2 
control unit, and the peacetime carrier frequency was fixed at 246 MHz. 
The YG beacon was installed at NAS Ft. Lauderdale, FL, from where Flight 
19 departed but has never returned.

73

Jan
SP5XZG

W dniu 22.03.2024 o 20:06, MARK DORNEY via ARC5 pisze:
> 
> 
> 
> 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
> 
> 
> “In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson
> 
> Sent from my iPhone
> 
> 
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