In message , John Smith
writes
JB wrote:

...
There ya go.
One of the problems of breaking up the path to ground on the shield is that
now static can build up. If you can provide a way to bleed off the charges
that build up on both halves, while breaking up the shield currents, now you
have made it worthwhile. But when you guys start discussing off center fed
dipoles, I step aside. I have computers in the shack. I have better luck
with fan dipoles. Also running a Butternut vertical. Works a lot better
than a 4btv, but a pain to get it right on all bands.
Thanks
Also liked the other pdfs presented. I never have time to read them
all
because of constant interruption around here. Back to work.


OCF antennas were not fully appreciated by me, a few of Cecils' helpful
insights and encouragement and I built one and was rather surprised ...
I do not have one right now but that is only due to neighbors/property
constraints.

Here is a URL for design/implementation of "non-standard"
baluns/transformers, but of a highly useable and desirable nature--or,
Dr. Sevick strikes again!:

http://www.highfrequencyelectronics....104_Sevick.pdf

Fig. 6(A) is very interesting. A 5-winding, 1:1.56 bootstrap
transformer which provides 50/75 ohm connections/substitutions.
Perfect for allowing one to use 75 ohm "junk" (or found in dumpsters)
tv coax in place of more expensive 50 ohm coax.

I have made good use of this since I have thousands of feet of NEW 75
ohm coax I purchased from a scrap dealer for next-to-nothing! A lot of
large dia coax and hard-line mixed in!

Regards,
JS

What about the loss in the balun? You need to decide if the loss in the
balun is less than that you would get if you simply used the 75 ohm coax
direct. And ask yourself 'In my application, why would 75 ohm be more
lossy?' Also, with similar physical dimensions, construction etc, 75 ohm
coax is slightly less lossy than 50 ohm (current is less, so 'I squared
R' loss is less).
--
Ian