On 1/27/2014 8:08 AM, W5DXP wrote:
On Sunday, January 26, 2014 10:21:01 PM UTC-6, Jerry Stuckle wrote:
And yes, the title is about antennas. But you're replying to messages
about verticals.

Nope, please learn to read. Here's your posting to which I replied:

So? Even at 50 ohms, 1KW is a lot of voltage.

There's no mention of vertical antennas - just a broad sweeping assertion that "1KW (sic) is a lot of voltage". BTW, is that potassium watts, Kelvin watts, or the kinetic energy in 1kW? Hint: 'K' is not the correct prefix for kilo.


You haven't been reading, have you? Look back at what the post was
referring to.

Now back to the subject of my original posting: IMHO, 1kW into 50 ohms is not a lot of voltage since I have more voltage than that in my house. FYI, 50 ohms is considered to be one of the lower resistances which ohm's law says results in a lower voltage that if it were a higher resistance.


It is definitely sufficient to fry someone (literally, since RF burns
from the bone out).

And tell the electric companies, broadcasters and the rest of the world
they shouldn't use 'K' for Kilo. Or are you just trolling, also?

If 1kW is a "lot of voltage" at 50 ohms, how low must the resistance go for it not to be a "lot of voltage"?


You tell me. You claim to know so much, then you know the formulae.
And you're the one who claims it's "not a lot of voltage".

A resonant 1/4WL monopole with a good ground plane has a resonant feedpoint impedance around 35 ohms which at 1kW results in only 187 volts at the feedpoint. How anyone could consider 187 volts to be "a lot of voltage" stretches the imagination.


Gee, 117V is quite enough to electrocute someone. But I guess that's
"not a lot of voltage", either.

If you really want to talk about "a lot of voltage", talk about the voltage that exists at the tip top of that 35 ohm 1/4WL monopole when only 187 volts is being applied at the base feedpoint. I get more than 10,000 volts. Now that's indeed a lot of voltage.

Who cares about the voltage at the top of a 20 meter tower? It's out of
reach, anyway.

But that's all immaterial, since when you're at the top of that tower,
you're isolated from any ground potential. Have you ever climbed a live
base-fed AM broadcast tower? I have, when I was young and did tower
work for a living. It was only a 5KW station, but even when I was at
the top I didn't feel anything.

You still didn't tell me if you were over 90 years old or not. So much
about your diaper claim!

And BTW - I might still have my old Ramo and Whinnery's "Fields and
Waves in Communication Electronics". I hope so, anyway. It was a first
edition, fresh off the press. Even though I marked it up a bit, I'll
bet it's worth something now.

And BTW - your sig separator is broken. It should be *exactly*
hyphen-hyphen-space-newline. You are missing the required space.

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Remove the "x" from my email address
Jerry, AI0K

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