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

[Michael Hanz]

Wow!  Thanks, Robert!  Sounds like a poor man's version of the AN/APR-4 
countermeasures receiver and its predecessors.  Same use of a 955, too.  
During the first half of 1943, 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?

  - Mike  KC4TOS

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 
> Command receivers cut off at about the center IF transformer) are 
> mounted in a shock mount rack that looks nothing like a triple 
> receiver rack.  They are normally operated from a dry battery box but 
> any one at a time can be run off of the 46145.  Each has a 140 ohm 
> dropping resistor for when they are powered from the receiver.  
> Nominal center output frequency is 1000 to 1200 KC (for plus or minus 
> QRM from BCB stations).  The converter outputs are all tied together 
> at the receiver antenna post.
>
> AN/ARC-5 is not mentioned, but the Contract date is June 5, 1943.
>
> There may have been an earlier version, too, as on page 16 (only) they 
> are referred to as CUO-46205, 46206 and 46207.
>
> The converters all use a single 955 oscillator-mixer.  Strange 
> circuit  The antenna connector goes to the heater positive terminal in 
> the 46212 and 46213.  And to the heater and the cathode in the 46213.
>
> They were made by General Electronic Industries, Div. of Auto-Ordnance 
> Corp. in Greenwich, CN.  Several sources show CUO as McGuire Industries.
>
> I have never seen any of the units, either in person or in catalogs.  
> Nor have I ever heard of anyone mentioning them.
>
> In a message dated 07/15/2016 06:37:44 AM Central Daylight Time, 
> aaf-radio-1 at aafradio.org writes:
>> It's a good bet.  The R-24/ARC-5 broadcast band receiver is the only 
>> receiver I have ever seen the MX-20 installed on. (Along with the ARA 
>> (CBY-46145) and BC-946 versions of the adapter.)
>>
>> What are the three other converters, Robert?  I have a tickle of such 
>> a memory but I'm coming up blank.
>>
>> - Mike  KC4TOS
>>
>> On 7/15/2016 2:35 AM, WA5CAB--- via ARC5 wrote:
>>
>>> That or the ZB-2, ZB-3 or AN/ARR-1 until the AN/ARR-2 could replace 
>>> them.  And there was a group of three converters that I've never 
>>> seen an actual example of.
>>>
>>> In a message dated 07/14/2016 23:15:26 PM Central Daylight Time, 
>>> cjack93907 at razzolink.com <mailto:cjack93907 at razzolink.com> writes:
>>>> I also have a couple of the MX-20 aux power adapters.  Any idea 
>>>> what these
>>>> were used for?  Maybe to power the LM frequency meters?
>>>> Dave, WA4OBJ
>>>
>>
>
>
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
>
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