On Tue,1/27/2015 9:50 AM, Mel Crichton wrote:
So if using a pulley, please be sure the supporting branch is
stout I had to replace the windshield of my truck to prove this
point to me. I find it best to install inverted vee type (center
supported) dipoles or very light inverted L's to
I was rereading the article by Cary Oler and Ted Cohen (N4XX), published in
1998, which provided a good primer for understanding, as much as we can,
propagation on Topband. In one section the impact of a high K index on the
auroral oval, and its subsequent impact on signals passing through the
Hi Brad,
Great to hear you had similar results.
The 20VR1 and the 20DRGG5 filter appear to be of very similar design (two
stage filters, and component values not vastly different). The 20VR1 looks
to be double the price of the 20DRGG5, but it might offset some of the
additional cost if it
From mid-November through mid-February, daylight over Antarctica
and the Southern Ocean prevents the 160 meter long path from
propagating due south (+/- about 20 degrees).
Except for sunspot minimum, short path propagation transiting only
the northern hemisphere to southeast Asia is very
Don,
You make a good point about the difference between our definition of CM
noise and the definition implied in Part 15. If the external torroid made
a difference for you, then it's important and worth having.
We can't be too optimistic about the manufacturer's interest in fixing this
kind of
are talking about current that is flowing in the same direction on three
conductors. In my case the additional Toroid core choke had a very
noticeable impact, and I now can't tell when the treadmill is on when
using
the combination of both filters.
P.S. I sent an e-mail to the manufacturer of
I was rereading the article by Cary Oler and Ted Cohen (N4XX), published in
1998, which provided a good primer for understanding, as much as we can,
propagation on Topband. In one section the impact of a high K index on the
auroral oval, and its subsequent impact on signals passing through the
On Tue,1/27/2015 3:19 PM, Brad Rehm wrote:
You make a good point about the difference between our definition of CM
noise and the definition implied in Part 15. If the external torroid made
a difference for you, then it's important and worth having.
Exactly. The commercial filter addresses
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
donov...@starpower.net
Sent: Tuesday, January 27, 2015 3:28 PM
To: topband@contesting.com
Cc: n...@comcast.net
Because the southern magnetic pole is just off the coast of Antarctica and
directly south
On Tue,1/27/2015 4:08 PM, Tom W8JI wrote:
The flaw in this system is that differential voltages between current
carrying wires are not measured, and anything on the safety ground
isn't measured. Noise voltage is only measured from individual
current carrying conductors to ground, and the
Hi JC,
Thanks for your interesting email. You may be correct that SSE/SSW
long path propagation may not extend very far into the southern
hemisphere. I wasn't aware of the NNE/NNW observations by
our southern hemisphere friends. It also appears that SSE/SSW long
path is more reliable for
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