Roy Lewallen wrote:
wrote:
. . .
Will a 4:1 current balun transform a random impedance Z1 to Z2 where
|Z2|=|Z1|/4? I know Roy pointed out that this won't work for a voltage
balun...

No, it won't either. The amount of error with any balun type depends on
the balun construction. You'll just have to build one and see what it
does.

It would be interesting to know what your antenna Z looks like on each
band at the input to the existing balun. That is, what do you get when
you connect your antenna to the balun output and the analyzer to the
balun input?

Since the balun is connected to a tuner, inaccurate impedance
transformation won't matter much. The only concern would be if it's a
sign of some other problem in the balun.

For a monster 4:1 current balun of the type that has two independent
'cores', see page 30 of:
http://www.yccc.org/Articles/W1HIS/C...S2006Apr06.pdf
(or for short: http://tinyurl.com/qnzs3 )

The whole article is about common-mode chokes, and is well worth
reading. It shows what can be done to tame a "noisy" QTH, if you're
prepared to go to extreme lengths... and this guy certainly was!


--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek