On Sat, 13 Jan 2007 22:03:04 -0000, "ferrymanr"
wrote:
[snip]
.......quick test with antenna
analyzer and 50 ohm carbon resistor as a load it seems to work well from
below 3 to 30 MHz. An oscilloscope shows the output to be well balanced.

I would be far more concerned as to what its common mode impedance is.
From what you describe it sounds like a voltage balun and those
generally have a poor common (blocking) mode impedance.

Danny, K6MHE