[Elecraft] 12 VDC Output (was: Automatic 1:1/4:1 Balun switching under K3 control?)

Joe Subich, W4TV w4tv at subich.com
Fri Dec 21 12:41:17 EST 2007


Wayne, 

> There would be one wire running from the AUX I/O connector to 
> the BL3, and you'd need to power the relay from the K3's switched 
> 12 VDC accessory output.

What is the spec for the 12 VDC accessory output?  OM7ZZ ran into 
some issues in interfacing with the K3 from the VP6DX group because 
the accessory output was only 10.8 volts even with a well regulated 
13.8V supply to the transceiver. 

10.8 would be marginal depending on cable resistance for a remote 
relay and is certainly too low for most of the commercial antenna 
switches that use 12 V relays.  

73, 

   ... Joe, W4TV 



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