[TenTec] Zepp?

[Steve Hunt]

Just one observation on switchable baluns - don't do it the way Elecraft 
does it!

They take two separate 1:1 current baluns and connect their inputs in 
parallel; then they connect their outputs in series to form a 
conventional Guanella 4:1 current balun. That's fine!

But when they want it to be a 1:1 balun they connect the outputs in 
parallel - unfortunately that halves the CM impedance of the balun 
compared to using just one of the 1:1 baluns on its own!!!! It makes for 
a simple switching arrangement, but it seems a pity to throw away all 
that hard earned CM impedance.

Steve G3TXQ