Dipoles and the rig's RF ground...
 

Dang Charles, I did exactly the same thing in 1957. If you had
asked me, I would have told you to watch out for those metal
microphones when using a Windom.

I only made that mistake once! That burn was very slow to heal, by the way.
I clearly understood several principles after that. Close-talking the mic
and over-modulation was the least of them.

Dipoles and the rig's RF ground...
 

"Charles Schuler" wrote in
:




No, I mean ELECTRICALLY balanced. And with the feedline at right
angles to the antenna so that it doesn't pick up anything by
induction. It's a tricky thing to do, yet back in the old days hams
used to feed dipoles or extended double zepp antennas with open wire
line and not get much RF in the shack. I know mine didn't.

Ran a Windom in Texas in 1965 (WA5KBO) with only 150W and burned a
hole in my lip (no joke) with the RF on the metal ring around the
microphone! The Windom was a good performer, but I could not
effectively ground the rig. I was in student housing (College
Station) and was not allowed antennas but improvised!

A true windom with a single wire feed, or one of the latter-day kind with
twinlead?


--
Dave Oldridge+
ICQ 1800667

Dipoles and the rig's RF ground...
 

"Charles Schuler" wrote in
:



Dang Charles, I did exactly the same thing in 1957. If you had
asked me, I would have told you to watch out for those metal
microphones when using a Windom.

I only made that mistake once! That burn was very slow to heal, by
the way. I clearly understood several principles after that.
Close-talking the mic and over-modulation was the least of them.

This is where those artificial ground things come in handy. But the end of
the counterpoise needs to be where it can do no harm, as that's where the
artificial ground sticks the voltage.


--
Dave Oldridge+
ICQ 1800667

Dipoles and the rig's RF ground...
 

A true windom with a single wire feed, or one of the latter-day kind with
twinlead?

Single wire feed. I was a student (living off of my wife) and used what I
could get my hands on.

Dipoles and the rig's RF ground...
 

Single wire feed. I was a student (living off of my wife) and used
what I
could get my hands on.
=======================================

A true radio amateur!

Just get a random, bent wire into the air. A single-wire feed helps a
lot. With a modest ground and a simple tuner you have an efficient,
multi-band, go-anywhere antenna system you can be proud of.

Anybody who boasts about his G5RV has never tried anything else.
----
Reg.

Dipoles and the rig's RF ground...
 

On Mon, 9 Jan 2006 22:29:58 +0000 (UTC), "Reg Edwards"
wrote:


Anybody who boasts about his G5RV has never tried anything else.

Sounds like the text for a bumper sticker!

Owen
--

Dipoles and the rig's RF ground...
 

"Reg Edwards" wrote
Single wire feed. I was a student (living off of my wife) and used
what I
could get my hands on.
=======================================

A true radio amateur!

Just get a random, bent wire into the air. A single-wire feed helps a
lot. With a modest ground and a simple tuner you have an efficient,
multi-band, go-anywhere antenna system you can be proud of.

Anybody who boasts about his G5RV has never tried anything else.

Right.....you should hear the bands open up when you launch a kite
antenna. There's nothing like a few hundred feet of random long wire up
in the air. ;-)
WARNING: No one should ever do such a thing for what should be very
obvious safety reasons.

I'm a big fan of cubical quads, but you need allot of room for them.
I'd take one over a yagi any day. I built a two element quad for 10
meters using bamboo fishing poles for the spreaders. The boom was made
from cedar. It lasted about three years before a flying tree limb took
it out. I also made an 8 element quad for 2 meters using 1/2" poplar
dowel rod spreaders and a wooden boom as well. Man was that thing hard
to tune. Weird things happen after the fifth element is added for some
reason. Might explain why most have only 4 elements. ;-) Seriously,
it really kicked ass but the tornadic storm took it out too. I'll not
be making another with that many elements, too fussy but extremely
narrow beam w/incredible back side rejection.

Dipoles and the rig's RF ground...
 

Reg Edwards wrote:
Anybody who boasts about his G5RV has never tried anything else.

Reg, I replaced my 130 ft. dipole with a G5RV so I could
experiment with it. Given my modifications, Nobody can tell
it from the 130 ft. dipole so there's no reason to return
to the 130 ft. dipole. My G5RV has an SWR of less than 2:1
on all eight HF bands.
--
73, Cecil http://www.qsl.net/w5dxp

Dipoles and the rig's RF ground...
 

"Cecil Moore" wrote
My G5RV has an SWR of less than 2:1
on all eight HF bands.
=========================================

The CIA W.M.D. department must have told you that naughty fib.

The SWR on your 380-ohm transmission line to the antenna is umpteen
times greater than that!

Isn't it time you changed the name of your SWR meter?
----
Reg.

Dipoles and the rig's RF ground...
 

Reg Edwards wrote:
"Cecil Moore" wrote
My G5RV has an SWR of less than 2:1
on all eight HF bands.

The SWR on your 380-ohm transmission line to the antenna is umpteen
times greater than that!

I'm not talking about SWR on the series section transformer,
Reg, I'm talking about on the 50 feet of RG-213. And it's
not "umpteen times", rather limited to about ten times.

Isn't it time you changed the name of your SWR meter?

Nope, for a G5RV with the nominal 70 feet of 50 ohm coax,
the SWR meter is indeed reading the SWR on the coax.
Remember, I'm not using a tuner. The coax from the G5RV
goes directly to the transceiver through the SWR meter.
I actually use my SWR meter to display the SWR.
--
73, Cecil http://www.qsl.net/w5dxp