Re: show your mic

Tim Gorman carries carbon elements. They are used but they are
available. If you have any 1960-1980 Western Electric standard
telephones, especially dial type, check to see if they have carbon

tim ab0wr

On Mon, 23 Apr 2018 23:36:24 +0530
"Mvs Sarma" <mvssarma@...> wrote:

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@...>

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@...>

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
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


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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