[Milsurplus] Forest Service SPF radio detail

[Hubert Miller]

I was looking at WB6NVH's website pages on the Forest Service type SPF radio, and he gives the likely 
output impedance of the transmitter as dealing with 100 ohm load. But - the SPF was intended to be
used with either 1/2 wave endfed, or a Windom. I have just now looked at Windom antenna listings on
the net, and I mean SINGLE-wire feed, not coax, but it seems every article is shy about giving the Z of
the Windom antenna. I read that the original idea was to tap at guesstimated 600 ohm load. But I notice
the commercial OCF antennas now offered have a 1:4 balun. I assume this is ohms ratio, not winding ratio?
Otherwise the coax to antenna ratio would give 800 ohm antenna. If it's ohms ratio, then this assumes the
antenna about 200 ohms. I don't know the exact impedance of an end fed 1/2 wave, and maybe no one
else does either, but I assume around 1000 - 2000 ohm. So for the SPF article I mentioned above, I would
instead state that the SPF is intended for antenna impedance of 600 to 2000 ohm. 
What say?
-Hue Miller