[Elecraft] BL-2 Balun Heating

Jim Dunstan jdunstan at tbaytel.net
Thu Nov 19 23:16:38 EST 2009


PS

I believe the BL-2 is rated at 150 watts .... so running at 125W is already 
at the limit .... even when it is placed in the ideal point in the circuit 
... (50 ohms resistive).  Place it in a point in the circuit where the 
resistance varies up or down from the ideal of 50 ohms and then make it 
complex with added reactance and the unit could make like a toaster 
element.  Of course if you operate QRP you will be just fine as long as you 
tolerate the RF power loss in the balun.  Just imagine trying to make the 
circuit work at 1KW.  Nothing like power to illustrate weakness.

Jim, VE3CI



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