Re: [TenTec] Zepp?

[Steve Hunt <steve@karinya.net>]

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
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