Is this all being done with the portable antenna analyzers? Those can be
surprisingly susceptible to nearby BCB stations that are out of ham bands, but
detected by the analyzer and influencing the measured numbers/curves.
These little analyzers are completely useless at my QTH (100V Pk-Pk
Joe: go here for an excellent QSO scheduler resource:
http://www.obriensweb.com/sked/
72, Jim Rodenkirch K9JWV
Good luck with WAS! I finished mine, QRP version, last February!
From: gali...@comcast.net
To: topband@contesting.com
Date: Tue, 8 Jan 2013 21:44:37 -0500
Subject: Topband: 160
Post is pressure treated and has been outdoors a couple of years .Antenna
is insulated with a PVC pipe sleeve .My hand does not effect it till I
touch, if only 1/16 inch away .The effect is greater if I touch the one of
the u bolts clamping the PVC to the wooden post .The u bolt is
Hello Fellow Topbanders:
I have just started the process of converting a MLA-2500 amplifier from
it's original 8875 tubes to Gi-7b tubes. Current;y I can run only abut
400 watts on Topband, (not from the MLA=2500, I have no tubes for it)
The conversion requires a RF Choke in the filament
After watching and drooling over the reports of the past few days
where the mainland is working DX like 20 meters, the propagation
gods have moved to the Pacific.
Today I arose and hit the button at 1500Z and right there on the dial
was OH3XR calling CQ, 579 signal, I thought it was a pirate
Hi,
Is it really necessary to isolate the vertical from the pressure treated 4 x
4 with PVC tubing and is it really necessary to install a 1:1 balun between
the antenna and feedline in this 4-square receiving array?
Doug
Think of all the ways you can hurt yourself laughing.
-Original
Thanks to all who replied! I recognized many of your calls from
previous contests and QSO's. I will be working the upcoming CQ 160
contest and hope to grab a few more states that I need. Hopefully a KL7
too! -Joe
On Tue, 2013-01-08 at 21:44 -0500, Joe wrote:
Hi All, I'm Looking for skeds to
Thanks to everyone who responded .The posts by K7TJR and W8JI were most
helpful in understanding what is going on .I should add that the phasing
box in the shack is continuously variable, (NCC-1) so changes in the
phasing caused by changes in the antenna surroundings came be compensated
. It
Hello Mike!
I have built a linear using a GI46 tube (nearly a GI7B, only the cooler is a
bit better). You see it at www.hoeppe.name
I used 1mm wire CuL on a 1/2 ferrite rod. The rule is as much as
possible. On 160m the inductance will drop significantly, causing that some
of your RF on the
Hi, Mike
Well, I would think that a reactance of perhaps 150-200 ohms at 160 ( if
your conversion includes 160) would be sufficient. That should be
sufficiently large relative to the tubes' input impedances that it shouldn't
have much of an effect on the amp's input impedance. If you try to make
Is it really necessary to isolate the vertical from the pressure treated 4
x
4 with PVC tubing and is it really necessary to install a 1:1 balun
between
the antenna and feedline in this 4-square receiving array?
In this case the antenna was base loaded and pretty short (30 feet = .05
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