Just remember that the highest voltages are at the ends of the top hat
wires. Insulate accordingly ;-)
PeteR N8PR
Message: 1
Date: Wed, 3 Jan 2018 14:28:22 -0500
From: Mike DeChristopher
To: topband@contesting.com
Bruce,
I used to resonate my tower on 80m with 22 ga wire in two direction
John (and others)
I would not like to see the below suggestion carried out for the following
reason:
There have been times that I have used a WebSDR receiver in Europe to help
me decide where to transmit from here in Florida. An example was the
3C0/3C1 operations.
I am pretty sure that th
In my opinion, there is nothing wrong with working the same station on the
same band more than once. We used to do it all the time to assure we had
"insurance" contacts with someone we needed for DXCC or other award. Online
logs and ClubLog has limited that need to some extent, but not everyon
This is just the same type of comment that was made back when SSB took over for
AM Phone operations.
SSB was considered “Not Real Ham Radio” and now is not even a pause in
anyone’s mind about it being a “development” mode.
FT8 is the same... a development that allows us to hear deeper into
Terry,
You might consider four half wave sloping dipoles with the upper end hung out
about 3 – 4 feet from the top of the tower. I used this arrangement with four
Current baluns at the dipole center and 75 ohm feed. The feed points were
spaced 1/4 wave apart just as you would with any vertic
Joe,
You might consider that there is interaction of the Waller Flag and the
other two towers as well as your transmit antenna while on receive.
I suggest that you detune both of the other towers, as well as the transmit
antenna while using the WF on receive to eliminate them re-radiating noi
I have to disagree with some of what has been said about how much power to run
using JT65.
JT65 is a LOW SIGNAL mode, NOT a LOW POWER mode.
We run 1500 watts into 20+ dB gain antennas on 2 meters for EME. Signals
coming back from the moon vary between –10 and –29 dB
Why limit yourself on 16
I keep reading about all the WSPR and other low power modes where one person
was heard all around the world. Well, maybe on a given night that can happen.
-23 on JT65 is 10 dB below the threshold where a CW signal can be copied by
ear... and I see many signals on JT65/JT9 at that level into m
I guess it depends on what you want to do on 160.
Rag chew with the locals -- put up an NVIS low dipole
Work the rare DX -- put up a 4 square of 1/4 wave verticals with 32 to 120
radials under each one and then buy a 200 ft. tower and put up a Waller Flag
for receive. (or if you have 100 acre
Trevor,
as well as the link from Chavdar, you might look at this You Tube video I
made on detuning the TX antenna for reducing RX noise:
https://www.youtube.com/watch?v=38G-awzhQH0&t=13s
73, PeteR N8PR
To: topband@contesting.com
Subject: Topband: RX/TX Antenna decoupling
Hello Trevor
Why not try a Half Sloper. Your tall crank up would work well with that...
Take Coax up inside the tower and then run the braid to ground at the top of
the tower and a 1/4 wave wire +/- off to one side at about 45 degrees.
It will make the whole system work. You might have to cut or lengthen
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