[Elecraft] electronic product standards

[N2EY at aol.com]

In a message dated 2/13/08 5:45:39 AM Eastern Standard Time, 
k4vud at hotmail.com writes:


> There was a time when a 4 pin mic plug had pin one as mic and 2 as ptt and 
> 3 as gnd.  Johnson, Heath, and all the other xmitter makers AGREED.
> 

When was that?

I've had Johnson transmitters that used the Ampenol MC1 type mike connector, 
and Heaths that used the odd 2 pin connector that is hard to find today. 
Others used the 1/4" "stereo" plug, except those that used the version which is 
0.206" (PJ-068?)

Of course it was common in those days to modify the rig to use the connector 
you liked, and there was lots of room in the rig to do it. But the original 
equipment connectors were all over the map.

The four-pin connector was a Japanese standard for a while. But then came 
mikes that needed voltage at the mike for the element, mikes that had DTMF pads 
on the back, mikes with built in preamps, mikes with up/down frequency 
switches, etc. 

One more reason to use CW!

73 de Jim, N2EY 


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