"Radio Man" wrote in message
news:XVo3d.473$C8.256@trnddc05...
Is there a means of testing a 9:1 or 10:1 balun to make
sure it is the correct impeadance before connecting it to
an antenna or tuner?

If at a low frequency , put a resistor across the high impedance of the
balun equal to the design impedance and check the swr. Frequency does not
really have anything to do with it, just it is sometimes hard to get a
resistor that is not reactive and is acting like a resistor at the higher
frequencies.

Build 2 of the baluns and connect them back to back and put a 50 ohm dummy
load on the second one, assuming you are going from 50 ohms to the 450 or
500 ohm impedance unbalanced. Then measuer the swr.