Re: show your mic

MVS Sarma

In continuation, i suppose that except salvaged ones , we may not be able to get carbon mics now a days.

MVS Sarma

On Mon, Apr 23, 2018 at 11:34 PM, Mvs Sarma <mvssarma@...> wrote:
Simple . It works with a DC bias and resistance variation of carbon granules packed in a mic  convey the speech content.
 Only diffiernce is that the bandwidth would be much less as against electret or dynamic mics.

MVS Sarma

On Mon, Apr 23, 2018 at 11:28 PM, Arv Evans <arvid.evans@...> wrote:

It will be interesting to see, and hear, how that T-32 carbon button microphone
works with the BITX.  It may need some attenuation because carbon microphones
usually output a fairly high level signal.  who knows...we could be seeing a new
trend of using carbon microphones for their inherent frequency limiting and high

Arv  K7HKL

On Mon, Apr 23, 2018 at 10:32 AM, Lee <mr.olson@...> wrote:
The microphone is a Model T-32 made by Kellogg Company for military communications.  It was sometimes used with the English T-1154 transmitter in WW2 Lancaster bombers.  Yes, they were used in many places after the war and one popular use was on a PA system in railroad yards.  Since I need 4 wires I am using a Cobra/Midland CB style 4 pin plug and jack with the locking ring.

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