[ARC5] 1943 VHF and UHF converters for ARA broadcast band receiver

[Jack Antonio]

On 7/17/2016 7:27 AM, Michael Hanz wrote:

> I don't recall any comms equipment
> running up in that range - just Allied, German, and Japanese radar
> sets.  Wonder what the portable application was designed to accomplish?
> Given that they were US Navy products, maybe enemy radar homing for PT
> boats?

The manual says the "primary purpose of the converter units is to detect
and determine the frequency of radar signals".

On the next page it goes on to say that the "ARA receiver is
mentioned specifically in this instruction book because it is a
standard communications receiver. However, any sensitive receiver which
can be tuned over a  minimum frequency range of 700 to 1300 kc. may be
used...".  Even though the main intended use seems to be aircraft, the
manual does mention shipboard and ground installations, where the 
receiver used should have a sensitivity of one microvolt, "only the very 
best communications receivers fall in this category".

Each converter has two antenna connections, one for a wire antenna
and the other is coaxial. The manual states the wire antenna normally
used for aircraft communications is to be used, if there is a choice,
use the shortest one.

It goes on to say that the coaxial input is to be used if a resonant
antenna at the desired frequency is available.

My manual is for serial number 17, so I doubt many of these units were
produced.

Jack Antonio WA7DIA



> On 7/17/2016 12:07 AM, WA5CAB--- via ARC5 wrote:
>> The three converters that I was vaguely remembering are the CUO-46212
>> (47-215 MC), CUO-46213 (200-545 MC) and CUO-46214 (535-704 MC.I had to
>> track down the manual for the details.  The MF receiver specified or
>> or specifically mentioned in the manual is the 46145 equipped with the
>> 62036 adapter.  The trio (which from the front look vaguely like three

>