[1000mp] Band Data Connector

[Pete Smith]

Nope - it's a big problem.  That transistor switch can't handle anything 
like that voltage.  My Mk 5 manual lists the limits as 0-12V DC and 100 ma, 
and specifically precludes AC or any negative voltage.

It's easy enough, though, to use that little switch to control a bigger 
transistor or FET, to achieve what you want.

73, Pete N4ZR

At 11:08 AM 7/29/2005, Win wrote:
>Pins 2 and 3 of the Band Data connector are connected to a transistor 
>switch driven by the same voltage that activates the TX GND relay.  I have 
>read in the past of people using this transistor switch to key 
>amplifiers.  I am currently using the TX Gnd relay with an external 
>transistor switch for this purpose.  Using the transistor switch would 
>take out a 10 to 15 ms relay delay, allow me to turn off the relay 
>eliminating the noise, and greatly improve QSK operation.
>
>My question is, does anyone have any idea of the voltage and current 
>limitations of this transistor switch?.  The circuit that I am switching 
>is about 125 volts without load and is 100 volts at 80 ma loaded.  My gut 
>feeling is that it should be no problem.
>
>Win, W0LZ
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