[NJARC] WE 631B

[Al Klase]

Hello Gary,

I don't know that specific mic, but, from the few pix I found on the 
web, it appears similar to the WWII Navy R-16 and RS-38 microphones.

I seriously doubt it is a noise canceling design.  Such mics will 
generally have holes on front and back, allowing ambient noise to reach 
both sides of the diaphragm.  If the same sound reaches both sides of 
the diaphragm there is greatly reduced movement and pickup.

I don't believe noise cancellation became common until after WWII.  The 
631B appears to be exactly what you'd expect in a late 1930's aircraft.

Is this Amelia Earhart related?

Best regards,
Al Klase - N3FRQ



On 11/18/2011 7:43 PM, Aaron Hunter wrote:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> Gary, I will forward this to our club newsgroup as I know nothing about
> microphones.
>
> Aaron
>
> Gary LaPook wrote:
>> I am trying to find information about the Western Electric 631B
>> microphone used during the '30s for aircraft radios. Specifically I am
>> trying to find out if it was a  noise canceling mic. Any help is
>> appreciated.
>>
>> Gary LaPook
>> KA9UHH
>>
> garylapook at pacbell.net
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/