Exactly right. I had trouble with "critters"
chewing my coax. Nothing bad happened until
it rained. Then the rain got into the coax
and the water interacted with the
DC voltage on the coax; terrible noise.
With the DC off, there was no noise even
when soaked.
I converted the DC feed to CAT-5
Hi Lee,
Your testing will be inconclusive unless you inject water into your
connectors, or you could just move to Maryland where we get at least
45 inches of annual rainfall and it gets into everything thats not well
waterproofed
73
Frank
W3LPL
- Original Message -
From:
Mike,
Would you be able to describe your choking method on the CAT cables?
I'm using something related to your method, but am very interested in
your successes.
Thanks in advance,
Rick Kunath, K9AO
_
Searchable Archives: http://www.contesting.com/_topband - Topband
Well propagation seems to have been fairly good over the past week . . . but
sadly there doesn't seem to have been much activity from NA stations.
Is it still very noisy over there for you guys?
Anyway, perhaps we'll see some stations on tomorrow night.
73 Roger G3YRO
_
CAT5/6/7 cables consist of four 100 ohm twisted pairs, each with a
different twist ratio to minimize crosstalk between the pairs. Indeed,
there is nothing inferior about it as a feedline as compared to coax,
except that it may see its Zo modified slightly if it's laying on the
ground or very
I've seen Cat 5 and 6 cable used up to 20MHz on one pair, power on another and data
on a third, perhaps switching on a fourth pair. I know this >works for distances
of at least 20 metres and I wonder if it would be good at LF for 10 times that
distance. It's also very tough and modestly
Leif Svalgaard of the W.W. Hansen Experimental Physics Laboratory at
Stanford University -- a highly regarded solar physicist -- predicts
solar cycle 25 SSN of 128 +/- 10.
According to Svalgaard:
"This prediction is near the average (123±21) of the 6 (now 7) precursor
methods that seem
Hi Dennis and top band interested folks,
The very first amps I made for myself were using an external power wire.
Using external power required some pretty heavy choking on each end of that
added wire. I started experimenting with power over the signal coax. I could
not see or measure any
