[ARC5] Fw: Single Transmitter Single Receiver 274-N in P-51-C

[DSP3]

The BC-639, and SCR-522/BC-640 etc. was used in ground based SCR-567, 
etc.for DF and fighter direction.  Looking at the freq. card, looks to 
me that they used the method whereby the aircraft transmits on a common 
HF freq. and receives on the published LF setting.,  Not unlike what was 
used for a long time in the US for general aviation.  That is, there 
were two tower common freqs. and you listened on the appropriate LF/MF 
range frequency, etc.  Later, transmit on a standard FSS or tower freq. 
(VHF) and listen on the local VOR frequency.

Been there and done that!!! Hi!!  Jeep - K3HVG


On 5/3/2018 6:36 PM, Michael Bittner wrote:
> Mike, There are 3 freqs above the range of the BC-1206 which does not 
> normally have a directional antenna, so I think the MN-26 is more 
> likely. And, you are probably correct on the SCR-522 and that this 
> card was likely for a different aircraft.  However, I don't understand 
> how you do homing with an SCR-522.  Is there a VHF direction antenna 
> somewhere in this setup, on ground or in the aircraft?
>
> Mike, W6MAB
>
>
> ----- Original Message ----- From: "Mike Morrow" <kk5f at earthlink.net>
> To: <arc5 at mailman.qth.net>
> Sent: Thursday, May 03, 2018 14:26
> Subject: Re: [ARC5] Fw: Single Transmitter Single Receiver 274-N in 
> P-51-C
>
>
>> Mike W6MAB writes:
>>
>>> You can see the frequency card at:
>>> http://texasflyinglegends.org/index.php/2017/01/11/winter-update-on-the-p-51c/ 
>>>
>>> Looks like all low frequencies for reception and ADF,
>>> plus VHF for transmission and Homing.
>>>
>>> How to you do VHF homing with SCR-274N?
>>
>> The card is for an aircraft with the four-chznnel VHF SCR-522-A and a 
>> beacon band receiver like the BC-1206-series.  Up to four 
>> air-to-ground channels are shown for each field, and one or two 
>> homing channels from airfield to aircraft.  It seems unlikely that 
>> the card shown would have had much applicability to an aircraft with 
>> only a single-channel HF SCR-274-N set for communications.  Perhaps 
>> the restorers do not have the appropriate original card for the time 
>> period depicted by the restoration.
>>
>> Mike / KK5F
>
>
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