[Milsurplus] New AMT-3 Dropsonde Webpage

[Al Klase]

Mike,

I suspect almost all mechanical hygrometers worked that way. They're 
still on the market:
https://www.amazon.com/Fischer-Instruments-111-01-Stainless-Hygrometer/dp/B00XRP79AY

Al

On 9/24/2018 10:50 AM, Michael Bittner wrote:
> Al, Your photo titled "Sensors" answers the question about temperature 
> and humidity.  Thanks for posting.  I had thought about a bi-metallic 
> sensor for temperature but the humidity one had me stumped.  
> Apparently a hair under tension can stretch or shrink enough to move 
> its stylus.  That one must have been a doozy to calibrate!
>
> Mike, W6MAB
>
>
> ----- Original Message ----- From: "Al Klase" <ark at ar88.net>
> To: <Milsurplus at mailman.qth.net>
> Sent: Monday, September 24, 2018 15:58
> Subject: [Milsurplus] New AMT-3 Dropsonde Webpage
>
>
>> Telemetry during WWII - http://www.skywaves.ar88.net/sonde/
>>
>> Non-abusive constructive criticism is always welcome.
>>
>> Enjoy,
>> Al
>>
>> -- 
>> Al Klase – N3FRQ
>> Jersey City, NJ
>> http://www.skywaves.ar88.net/
>
>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/