[Milsurplus] headphone element needed

hwhall at compuserve.com hwhall at compuserve.com
Mon Aug 20 23:24:22 EDT 2018


My hat is off to you for that!  Awesome.

Wayne
WB4OGM


-----Original Message-----
From: howard holden <holden7471 at msn.com>
To: Milsurplus <milsurplus at mailman.qth.net>
Sent: Mon, Aug 20, 2018 9:06 pm
Subject: Re: [Milsurplus] headphone element needed





Back in the beginning of June I sent a message to these reflectors about getting a new ANB H-1 
Western Electric headset element or possibility of repairing same. I had one response from 
"down under" but I eventually decided I had nothing to lose to try and open up the 
bad element and see if I could effect a repair. The element is built into a length of 
drawn steel tubing, and the end with the terminals is swaged over. Had I still been 
working, I would have put it into a suitable collet on a lathe and machined the swaged 
end off. Lacking my own lathe, I carefully pried at the swaged area, and worked a little 
less than half way around out to the tube diameter, and removed the internal workings. 
Visual inspection showed the coil winding broken at the point where the beginning of the 
winding exited the coil, rendering a simple fix impossible. Measured the wire as #40 
enameled, and based on the resistance of the good element there is approximately 125 
ft of wire on the coil. I ordered a small quantity (2 oz, or about 4150 ft) of wire from 
Remington Industries. Surprised they sold such a small quantity because the cost was only 
$6.22, and shipping was included!!! I managed to get about 100 ft of wire on the bobbin, 
not surprising because the original was obviously machine-wound, with nice layering of the 
turns and under constant tension, where I did it with a drill, a Rube-Goldberg holding 
fixture, and my hand for wire tension. It does work however, and should it ever break 
again, I’ve got lots of wire……… BTW #40 wire is nominally .003 inches diameter, about the 
average thickness of hair. 

Howie WB2AWQ



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