[Milsurplus] AN/AMT-3

[Hubert Miller]

Beautiful ! What a marvel !!
-Hue

On Behalf Of Al Klase
Sent: Sunday, September 23, 2018 3:10 PM
Subject: Re: [Milsurplus] AN/AMT-3

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<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.skywaves.ar88.net%2Fsonde%2FAMT-3_1.m4v&data=02%7C01%7C%7C3c04d66a007a489cc19a08d621a1588b%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636733374183141029&sdata=RrH85t3OQmEiHUN76JdCgOPkiIB3l2jWIzgt31Icsmw%3D&reserved=0>

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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