[Boatanchors] [Milsurplus] T-17 microphone

[Harold Hairston]

My recollection is that the TX element in the phones of the period is that 
it was a direct drop-in replacement. I am not home but I am sure this is 
correct. Don't know about current day telephone TX elements but I bet that 
there some old phones out there. I have seen them at the larger Hamfests. I 
bet if you were at Sheby hamfest this weekend your changes of finding one 
would good. Put out your needs and someone will find you one

Harold

----- Original Message ----- 
From: "Jim Haynes" <jhhaynes at earthlink.net>
To: <hwhall at compuserve.com>
Cc: <boatanchors at mailman.qth.net>; <milsurplus at mailman.qth.net>
Sent: Wednesday, August 27, 2014 10:29 PM
Subject: Re: [Boatanchors] [Milsurplus] T-17 microphone


> What are the dimensions of that element?  Wonder if a modern telephone
> handset carbon mike element would fit in there.  (I know people used to
> substitute the old F1 telephone mike elements, but they were too big
> and had to be taped on to the front of the T-17.  Very non-authentic.
>
> A modern (for 1960) carbon mike element is the T-1 used in the Bell 500
> type phones, G-type handset.  I just measured one to be 1 3/4" in
> diameter at the rim, then the rim part is about 1/4" thick, then the
> total thickness is about half an inch.  Without a T-17 mike to look
> at I'm guessing that might fit inside.  Much easier than trying to take
> the original apart and replacing the carbon.  Also you can get an
> electret replacement for the telephone carbon transmitter.
>
> Now the T-17 mikes were remarkably insensitive even when new.  I don't
> have the facts, but it's my belief that was done intentionally so that
> the user had to yell into the mike to be heard over the engine noise
> in an airplane.  The T1 should be a lot more sensitive.
>
> Jim W6JVE
>
> jhhaynes at earthlink dot net
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
> Message delivered to k4hca at windstream.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html