[ARC5] AN/ARR-69 inquiry

[zakariya.abu at yandex.com]

Roger.

W dniu 24.03.2024 o 23:13, Francesco Ledda pisze:
> No, it doesn’t, but don’t need that. Key mike, count to 4, and the other guy has the bearing to your ship.
> 
> 
> Sent from my iPhone
> 
>> On Mar 24, 2024, at 17:01, zakariya.abu at yandex.com wrote:
>>
>> Francesco,
>>
>> Thank you for the reply and the interesting information.
>>
>> Did the AN/ARA-25 hold the bearing "fix" with the RMI's arrow after each reception of transmission on UHF?
>>
>> As I wrote before re. the KC-97, it used radar beacons for rendezvous.
>>
>> I've just checked in a KC-135A manual from 1966 (rev. 1975), and it also mentioned such beacons: the AN/APN-69 and AN/APN-134. They operated at ca. 10 GHz. The KC-135A also the AN/ARA-25, as well.
>>
>> 73
>>
>> Jan SP5XZG
>>
>>
>> W dniu 24.03.2024 o 22:11, Francesco Ledda pisze:
>>> There is no need for a continuous transmission for the UHF DF to lock.  Few seconds of TX are enough to get the bearing to the station.  That is that is needed!
>>> Tankers also had dedicated beacons and later complementary TACANs.
>>> Scott J. knows about this better than anybody else!
>>> Best, Francesco K5URG
>>> Sent from my iPhone
>>>>> On Mar 24, 2024, at 14:32, zakariya.abu at yandex.com wrote:
>>>>
>>>> Jack,
>>>>
>>>> I think that TACAN has a dedicated A-to-A mode for finding air tankers. It was implemented starting from the AN/ARN-52 in ca. 1963.
>>>>
>>>> Methinks that homing on a tanker using eg. an ARA-25 UHF DF would require constant transmission from the tanker to facilitate finding it. What kind of transmitter other than UHF COM radio would be used then unless there was an extra system using CW or MCW for identification? Maybe our experts and practitioners could share how this was done in the 1960s and 1970s?
>>>>
>>>> 73,
>>>>
>>>> Jan
>>>>
>>>> W dniu 24.03.2024 o 20:12, Jack Antonio pisze:
>>>>> Maybe also used to home in on a tanker?
>>>>> Jack Antonio
>>>>> WA7DIA
>>>>>> On 3/24/2024 1:55 PM, scottjohnson1 at cox.net wrote:
>>>>>> Since Francesco is busy yacking to me on the phone, I will answer.  The ARA-25/50 are very effective, and are typically used LOS, and in the 225-400 MHz they are quite accurate.
>>>>>> Many downed pilots and aircraft (as well as ELTs going off on the ramp) have bee located with these adapters.
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>