Polyphaser made a tester.
http://wrblock.com/WRBproducts/DIGIfist/DigiFIST.html
Possibly a land mobile shop in your area has one. Essentially they
generated low current, high voltage until the tube fired.
Perhaps it is different with HF, but in my land mobile experience, if the
supressor was
They also made an earlier version that had an analog meter. It would indicate
the clamping voltage.
Typical failure mode for the Polyphaser is an open gas tube that doesn't
clamp... You loose protection and don't know it...
I've also been told they also have a shelf life and at times the
Hi Doug,
I also use passive verticals in my 350 foot diameter W8JI 8-circle array.
Reliability has been excellent (no failures in three years) because there
are no sensitive electronic components in the array, except for the
relays at the center of the array.
Many deer traverse my receiving
Maybe so Anthony but I distinctly recall attending a a IARU Region 2
conference some years ago in Ocho Rios, Jamaica and I was amazed at how
many people from HQ along with their wives or partners that were booked
in the 5 Star hotel where the conference was being held. It was almost
like HQ
When I test things like that, I high pot them with a home made tester.
Things like this are not difficult to make. You can buy a surplus HV power
supply used to ionize air for a few bucks, and stick it in a box with a
meter on it.
You don't need to get fancy, just check it for breakdown
Does anyone know how to test a Polyphaser to know if it is still good?
I have some that have seen some lightning storms and was wondering if
they are still doing the job. Thanks, Greg
_
Topband Reflector Archives - http://www.contesting.com/_topband
I don't know if the policy is still in place, but I remember that
Polyphaser used to offer free testing of their products if you sent them
back to the factory. Words about it were buried somewhere in their
catalog, and I used the service many years ago when I was about to put one
of their old
On 2015-02-27, at 4:04 PM, mstang...@comcast.net wrote:
Eddy,
You do have a computer in the shack. You are an internet operator.
Ham radio was one of the first forms of social media. We used to discuss
operating and contesting issues on the air with our nets. We replaced the
radio
Reply to W8JI post of Sat, 28 Feb 2015 19:14:07 -0500:
The source of the r-f current flowing on buried radials is the r-f current
flowing in the earth as a result of radiation from the vertical monopole.
(etc)
It seems to me that answer ignores other effects.
1.) If we remove the earth,
Hmmm. I have had excellent success with that DXE 4- quare system. I use my
own verticals and the only problem is deer catching the top hat string and
bending the vertical. 70 ft baselines seems short as the recommended is 135
ft for 160m. I find it very forgiving as the system works even if
If the total energy flowing into the monopole system with buried radials
is dictated only by its hard-wired connection through the transmission
line back to the transmitter, then what is accounting for the reduction of
its radiated power?
Nothing I said even remotely implies loss would be the
Polyphaser made a test box for a few years...model was F.I.S.T. 4. Worked
really well..
Watch ebay...they may turn up there at times.
Cecil
K5DL
Sent using recycled electrons.
On Mar 1, 2015, at 5:27 PM, Tom W8JI w...@w8ji.com wrote:
When I test things like that, I high pot them with a
Richard--
Is it conventional to compare the surface wave fields at a distance so near
the Radial length and the wave length? 0.1 km Sounds like a lot, but it is
only 100m, which is low, in Lambda terms..
Bill--W4BSG
-Original Message-
From: Richard Fry
Sent: Sunday, March 01, 2015
I was just re reading the DXE manual on the circle array and they
discuss adding 15 ft radials of 10 to 15 feet or adding a couple of
ground rods per antenna.
The first thing I will do is see if I can grow the array another 30ish
feet in diameter so it works best on 80 and will work but not
24 hours and even not one comment?
What if I had a BOG for RX, buried, uninsulated radials and had worked K1N
with it during my move into a Brave New World?
Maybe I really should've said I was renting the station out for hire to
offshore stns only, to be used to work rare countries, during
I have used one inverted L and the horses wiped it out a few years ago.
I had about 70 ft of vertical and the rest horizontal.
I am not sure how much interaction the tree will have if you run the
wire next to it. The end sloping down will affect the match if my
memory serves.
If that is
I can speculate that your mail box would be overflowing and you could retire
comfortably especially if you had a 160m station that worked.
Sri Tom, I couldn't resist having some fun.
Doug
-Original Message-
24 hours and even not one comment?
Maybe I really should've said I was renting
The source of the r-f current flowing on buried radials is the r-f
current flowing in the earth as a result of radiation from the vertical
monopole. (etc)
It seems to me that answer ignores other effects.
1.) If we remove the earth, the radials still have current.
Yes, but then the
This is why wide broadcast towers, even 1/2 wave tall towers, can have
reasonably low impedances at the base.²
Agreed. I have found it very difficult to model accurate complex base Z
measurements of wide broadcast towers (i.e., low height/diam. ratio) that
are of the 180-195 degree variety -
This one interesting sentence, made in another thread, may be at the root
of
much of the disagreement expressed in the last few days with regards to
DXCC. It does cause one to wonder why the award exists at all. If DXCC
only
matters to the recipient, why wouldn't their logbook serve the same
Larry I admire your ability to see past the 'smoke and mirrors' and expose
the hypocrisy of the ARRL DXCC program. What you have said is true. The
ARRL speaks out of both corners of their mouth. There will be others who
will object to you exposing the DXCC program and there will be others who
The integrity of the program is irrelevant
This one interesting sentence, made in another thread, may be at the root of
much of the disagreement expressed in the last few days with regards to
DXCC. It does cause one to wonder why the award exists at all. If DXCC only
matters to the recipient,
Eddy,
Unfortunately many technical nets have been replaced by group discussions. I
participate in the group discussions but I enjoy talking about station and
antenna setups and hearing the results of the experimentation on the air.
My 160 inverted L came down during the first snowfall of the
Hi all, I have a 90 foot Rohn 25 tower with an insulated base and
insulated guy wire sections for top loading ,base fed for 160 meters. It
work great ,but I would like to use it on 80 meters as well.
The 3 ideas I have considered are voltage feed at the base with a
resonant LC network at the
I think the ARRL does many good things for Amateur Radio. They are also
involved in things that are good for them and not so much for us. Their
latest call for comments is directly related to the RM11708 issue.
The DXCC program history is certainly not a beacon of purity and
transparency is
I don't see ARRL staff pulling down six figure salaries, driving expensive
cars, or living in mansions.
Why do we always assume there is an ulterior and possibly malicious
motive? The inescapable fact is that the ARRL needs funds to fight for us
in Washington.
The ARRL is not perfect, but no
The feedpoint connection, in all cases of vertical antennas, whether the
system is shunt fed or series fed, or even if it is an end-fed half wave,
ties one feed terminal to the ground or counterpoise system. It has to be
that way, and the current out into that counterpoise (whatever the
I just recently hooked up my 8 ele rcv array and I was not too sure if
it was working correctly.
I will need to do some maintenance and checking when the snow is gone to
make sure each element is working right.
I chose the 160/80/40m which is close to 50 ft radius circle. I may opt
to make
My 4 sq DXE exhibits similar no directivity at times. I think it is
high angle signals. I did add three 20 foot radials to each antenna, I
don't think it matters what the vertical element is, a little better
grounding is good. My soil is wet/swampy forest/grass mix and I don't
think they
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