[Elecraft] A K2 question from a lazy guy

Tom McCulloch thom2 at att.net
Fri Nov 4 23:27:49 EST 2005


I have a K2 with the ATU among other options (but not the 100 watt amp) and 
I would like to measure my power output at the antenna terminal using a 
'scope.  The ATU provides two antenna jacks (switchable from the from 
panel).  The jack which came with the basic K2 and is used if the ATU is not 
installed is covered with soft plastic (?) so it is not used.

In order to measure output I have been opening the K2, disconnecting the 
ATU, put a 50 ohm dummy load on the original antenna jack and measuring the 
Vpp at the jack from inside of the K2. (The dummy load does not allow access 
to the 'hot' part of the jack from the outside of the rig)

My questions are:

    1) Can I (or should I) keep the ATU installed and measure at one of the 
ATU's antenna jacks?

    2) Can I keep the ATU installed, put the dummy load on the ATU antenna 
jack and measure the voltage at the original (non-ATU) antenna jack, from 
the outside (this jack would not have a dummy load on it, as the dummy would 
be on the ATU jack -- actually the real dummy would be holding the RF probes 
..hi).  This would avoid opening the K2 to make the measurements.

    3) Am I missing anything else? Is there a way to check the voltage from 
the outside without opening the cover?  How about a "T" splitter at the 
jack?

Thanks for your help.

Tom, WB2QDG
K2 1103 



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