[Antennas] measuring SWR

[Joe Mayenschein]

"Douglas J. Koehler" wrote:

> I don't claim to be an expert I can only tell you what has worked for me in
> the past. I've always had the best results building jpoles when I treated
> the J as a transmission line and made the ratio of conductor diameter to
> spacing to be around 300 ohms.

1- You NEVER said anything about the 300 ohm as the impedance of the "J" or
matching section,, you said that it was the impedance of the antenna.

>
>
> Yes, in theory, the top of the J is infinite and the bottom is zero. In
> practice I find that either end comes up a bit short on either end. that's
> my experience.

And would be very true

>
>
> I just thought I'd offer my experiences with building Jpoles in an attempt
> to help. After reading your response and 6 others off the list (one of
> which was quite abusive) I see now I shouldn't have bothered. Obviously
> your 30 years in amateur radio trumps my 25 years as a paid professional
> communications technician.

I didn't claim to be a Pro, I was just stating a thought and I even said that I did
not understand about the 300 ohm thing.

> I will now shut up and unsubscribe from this list.

And if a little Misunderstanding like this would make you leave a fine list like
this, I'd love to have your "Professional" Job,, because obviously you don't have
any type of boss like 99% of the rest of us have if a question like this gets you
all pissed off and want to leave.

eez!

Joe