[Milsurplus] AN/AMT-3
Al Klase
ark at ar88.net
Sun Sep 23 18:10:06 EDT 2018
Damn it Hue,
You're making me act on a 50-year roundtuit. Rough video here:
http://www.skywaves.ar88.net/sonde/AMT-3_1.m4v
You can actually hear the Morse directly as the stylus moves across the
three raised sectors on the disk. About 2/3 through I turn on the B+.
Pardon the ratty receiver. I'll work this into a proper page. Is a
BC-224 OK? There's a personal story here.
Regards,
Al
On 9/23/2018 1:50 PM, Hubert Miller wrote:
>
> I was looking thru the Tele-Tech magazine for November and December
> 1951, at a 2-part series on the AMT-3 radiosonde.
>
> ( BTW, I do not know if these magazine numbers are available online. )
>
> This is the set that uses the single tube 3A4 transmitter with a 3035
> kHz crystal, and untuned output.
>
> I recall there used to be a pile of the transmitter section, alone, at
> a surplus store.
>
> I didn't know this radiosonde send a 2-letter Morse code signal. Isn't
> that kind of cute ?
>
> Article says signal was picked up and decoded, using look-up table, by
> radio operator using BC-348-R, which means the
>
> dropping aircraft, apparently. Altho a photo with the article shows a
> BC-342.
>
> I wonder if any complete AMT-3 radiosondes with the 'record disk'
> survived ?
> That would be one interesting device to look inside !
>
> -Hue
>
>
>
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--
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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