wrote in message
ps.com...
Oh yes, what was I thinking. From the antenna feedpoint, I can run two
equal length pieces of 50 ohm coax to the 1/4 wavelength matching
sections into the T connector - as you just said.

But it will be much more convenient for me to just use an entire run
of 75 Ohm coax, but as I said before, now you have me curious about
the effect on bandwidth - I will have a total of 1.75 wavelengths of
75 Ohm coax per leg.

-Scott, WU2X


Hi Scott

How much do you like Smith Charts?? It would be very easy to plot, for
three frequencies, the impedance at the "far end" of the 75 ohm lines.
That seems like a 5 minute job. Then you will know the amount of error
introduced at the edges of your bandwidth. You'd know the impedance at the
upper, mid and lower frequencies. It may be that a couple wavelengths of 75
ohm line may not introduce enough error to be concerned with.

Jerry