[Milsurplus] Y YJ 1945 ?

[WA5CAB at cs.com]

My partial mistake.  You wrote "YJ and YH" and I somehow "saw" YG, probably 
because I never can remember the nomenclature of the other version.  

However, AN/APN-2 is an Interrogator, not an Altimeter.  Its antennas point 
ahead, not down.

To a fairly large extent, survival of the ASB into the latter part of the 
War is probably a function of survival of aircraft carrying it.  Because as 
on the ships, newer aircraft generally got the newer radios and radars unless 
there was some really good reason to do the retrofits.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 08/20/2016 02:02:57 AM Central Daylight Time, 
kargo_cult at msn.com writes: 
> YJ and YH are “long-wave racons” listed under “Navigation Sets” in the “
> U.S. RadarOperational Characteristics of Radar
> 
> Classified by Tactical Application FTP 217” Not radar but radar adjuncts, 
> you might say. If i called the YH-YJ radars,
> 
> my mistake. The text says that YJ can be interrogated by ASB as well as 
> some SCR-set. 
> 
>  
> 
>  My comment was largely that i thought ASBs had all been retired when the 
> microwave radar was viable. I see listed numerous Pacific sites,
> 
> ca. 1945, with only YJ racons. Hence my surprise. 
> 
> The beacons are lumped with the radars in the Navy discussion as they are, 
> most of them, interrogated by radars. In the radio charts, they are
> 
>  called “Racons”. YG is a separate animal and is identified on the charts 
> as “Beacon”, as compared to “Racon”.  AN-PPN-1 is clearly a beacon, 
> 
> interrogated by a radioaltimeter. I suppose that is a kind of radar in 
> that it measures reflected radio pulses.
> 
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