Thankyou verymuch to Grant KZ1W, Greg ZL3IX, Mike W0BTU, Garry NI6T and Jim
K9YC for all the suggestion.
As suggest by Grant KZ1W and Jim K9YC, I will install a half-lambda dipole
on 160M with both ends were 90 degrees bent due to the size of the building
,and find out what will be the Tx / Rx
Thanks to all who responded to my enquiry...an Inverted 'L' was the most
common advice so will give that option some serious thought. Further question:
should a ground rod be used as part of a radial system, or should it be treated
separately.? I have seen various arguments for and
My most recent method of connecting radials at the base of a vertical is to
drive in a short copper pipe ground rod and use an all-stainless hose clamp
to attach the wires to it.
But in some portable operations I have dispensed with any ground rod, and
the antenna still seems to work fine.
If the noise level is too high, perhaps you could use a separate receive
antenna.
A pennant, flag, or coaxial loop, might help null noise from certain
directions.
Art NK8X
ᐧ
On Sat, Aug 8, 2015 at 6:18 AM, Nuradi yb0...@gmail.com wrote:
Thankyou verymuch to Grant KZ1W, Greg ZL3IX, Mike W0BTU,
On Sat,8/8/2015 4:05 AM, rodger bryce wrote:
Further question: should a ground rod be used as part of a radial system, or
should it be treated separately.? I have seen various arguments for and
against, wondering what the group thinks on this.
A ground rod is NOT an effective part of a
And remember -- the roof of this building is 110m, so a horizontal antenna
is high enough to have pretty good low angle radiation! See
Large buildings are not towers or poles. Buildings have a significant amount
of large conductive metallic things and noise generating junk inside.
A
Some years ago, on 80 meters, an LZ station had a horizontal between
two tall buildings and had a very strong signal.
73
Bruce-k1fz
www.qsl.net/k1fz/beverage_antenna.html
On Sat, 8 Aug 2015 10:58:22 -0400, Tom W8JI wrote:
And remember -- the roof of this building is 110m, so
I have been in Jakarta and also a number of places in China trying to
operate
from a city environment, you cannot believe the noise, S9 if your
lucky, and its
360 degs, impossible to null,
Operating from BY1QH building top, the best was a dipole stretched
between two buildings roofs.
At
On Aug 8, 2015, at 10:58 22AM, Tom W8JI w...@w8ji.com wrote:
Large buildings are not towers or poles. Buildings have a significant amount
of large conductive metallic things and noise generating junk inside.
If the building has wiring and large connected metallic things under the
Some years ago, on 80 meters, an LZ station had a horizontal between two
tall buildings and had a very strong signal.
73
Bruce-k1fz
Between buildings is entirely different than on a building roof.
Full context is important. As I said:
A simple vertical antenna has elevation pattern mostly
Even with a 400 ft high building, a horizontal antenna a fraction of wave
over the roof can be very disappointing.
Tom is 100% right, one of the best rood top signal on top band is from
9M2AX. Ross tested several antennas and the only one that worked well was
the inverted L. He has a tall
Nuradi, how about halfwave sloping dipoles hung digonally from the top of
the building? Some 30 years ago at YU1EXY we had contest shack at top of
60m tall building with student's dormitory. In spite the building was in
the middle of city noise, sloping dipoles played extremely well. Later we
I have this with interest---lot of stuff maybe even at age 74 you
can teach an old dog new tricks...bookmarked and will attempt to
absorbthanks 73 john w8wej
On 8/8/2015 2:55 PM, Jim Brown wrote:
On Sat,8/8/2015 4:05 AM, rodger bryce wrote:
Further question: should a ground rod be
I agree with Mirko...sloping dipoles is the best choice for Nuradi
location...THE LOW BAND DXING book
is very clear.
If SEA WATER is close it is better.
73Douglas, CO8DM
No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción
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