Source for 3-500ZG?

Dave Henderson n0dh at
Mon Oct 14 05:22:20 EDT 1996

Well one of two 3-500ZG's in my TL-922 went belly up this AM (GRID to
Cathode short).
What has been people's RECENT experience (please no horror stories from
3 years ago,
etc.). By brand and dealer? Good , bad or indifferent.

At least it didnt wait for for CQWW or the XZ operation! Took the grid
chokes with
it as well. The tubes were 8 years old so what the heck! And I had the
forsight to
spare the grid chokes form the last "fire" eight years ago!


>From w2up at (Barry Kutner)  Mon Oct 14 11:50:44 1996
From: w2up at (Barry Kutner) (Barry Kutner)
Date: Mon, 14 Oct 1996 10:50:44 +0000
Subject: wasps
Message-ID: <199610141053.GAA02012 at>

Hi Jon - I carry a can of wasp/bee spray up the tower with me. Had 
the phone compnay out here a couple of weeks ago, and the guy said 
when he opened the box on the pole, there was a big wasp nest. They 
also carry the spray as standard equipment.

Not sure abt wasps, but the yellow jackets are history after the 
first freeze, which shouldn't be too far off. 73 Barry
Barry Kutner, W2UP              Internet: w2up at
Newtown, PA         FRC         alternate: barry at

>From km9p at (Bill Fisher KM9P)  Mon Oct 14 13:56:15 1996
From: km9p at (Bill Fisher KM9P) (Bill Fisher KM9P)
Date: Mon, 14 Oct 1996 08:56:15 -0400 (EDT)
Subject: 4-SQ notes from weekend.
Message-ID: <Pine.BSI.3.95.961014084444.5015A-100000 at>

Thought I would post my first weekends findings with the new 4 square.
The 4 square is made all of wire suspended by ropes from 100' tower and
trees.  Each vertical has 3 elevated radials.  The ends of some of the
radials are as high as 30' at the ends.  12' off the ground at the
feedpoint.  I use a Comtek hybid coupler.

The first thing I noticed was how well I could hear.  Better than my 750'
beverage to Europe for the most part.  F/B was generally 15 to 25 db.
Mostly about 20db I would guess.

Trey (@ ON4UN) commented that I was the same strength as N4AR.  N4AR was
running 800W and I was running 1500W.  Bill's system is ground mounted
with a very extensive ground.  I felt good to be the same strength.

I worked 55 Europeans Saturday night.  May not sound like a big deal, but
I definately felt louder and could hear better.  In comparing with W4WA
(ex AB4RU) I was generally 1 s-unit down from him to Europe.  Ron uses a 3
element parasitic inverted-V beam at 120'.  I believe we were running
about the same power.  I think I was hearing better than Ron was though.

The real test will be in 12 days.  I'm gonna add another (4th) radial to
each vertical this weekend if the WX holds.  (I'm also going to trim it
for SSB.  The following is the dumped power I saw in to the dummy load.
Be curious if this is about what others experience?

100W to system

3500		28W
3600		9W
 3650		2W
3700		5W
3800		19W
 3850		28W
3900		38W

Thanks to all the people who have been helping with this project...
including: K8CC, K3LR, K1KI, and K4PI among others.


Bill, KM9P

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