Thanks for the input guys.

I think that I'm going to break out the '259B and check antenna
impedances on various bands first. I'm probably going to go with the
1:1 choke balun even if the common mode impedance on all bands is not
significantly higher than the feedpoint impedance. I guess it
shouldn't be worse than what I'm matching now.


I think that I don't actually want a 4:1 transformer, as I know there
are a couple of bands where the impedance is fairly low, and if I had a
functioning 4:1 current balun, I'd be transforming it even lower before
the tuner can take a crack at it, and that just seems
counterproductive.

I'm living with some degree of imbalance now (which I've tested in that
the antenna SWR is different if I reverse the legs on the "balun"
output... they aren't equal lengths, they're whatever I can throw out
with a slingshot and a weight after a windstorm)

A 1:1 true current balun on some bands and a
not-quite-effective-current-balun on others is probably better than
what I've got now...

73,
Dan