[1000mp] Band Data Connector

[Garry Shapiro]

You will pop that transistor in a heartbeat. Sounds like you are switching
an SB200 or something equally old and unforgiving.


-----Original Message-----
From: 1000mp-bounces at mailman.qth.net
[mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Win
Sent: Friday, July 29, 2005 8:08 AM
To: 1000mp at mailman.qth.net
Subject: [1000mp] Band Data Connector


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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