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DIAMOND DISCONE VS JPOLE - re: INFO SOUGHT! DIAMOND DISCONE FOR TX
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Jason Brown
Apr 4, 2002, 3:21:35 AM4/4/02
to
Thankyou for your reply. The information requested was in relation to the
Diamond D-130J which retails for $195 at DSE. Basically I am using a Yaesu
VX-5R on a J pole antenna, which I have been told has approx. 3db gain. The
J pole works ine on 2m and 70cm, however, I would like to find an antenna
capable of three bands if possible.
Diamond D-130J which retails for $195 at DSE. Basically I am using a Yaesu
VX-5R on a J pole antenna, which I have been told has approx. 3db gain. The
J pole works ine on 2m and 70cm, however, I would like to find an antenna
capable of three bands if possible.
Would you or anyone else know, how the discone compares to the J pole at the
very least??? I am new to all of this, so I apologise for the perhaps
mundane question. Any information is greatly appreciated.
Matt
Apr 4, 2002, 6:25:53 AM4/4/02
to
Both in theory and in my experience, the jpole works better than a
discone on 2m and 70cm. If you look around on the net (i.e. qsl.net)
you can find many variants that are designed to cover 2m and 70cm, but I
have seen only a few that are designed to cover all three bands. I did
a search about a year ago and ended up finding a site with all the
designs and info/advice on how to build one, but I don't think I
bookmarked that one because at the time I was looking to find jpoles
made from 300 ohm ribbon, and this one was rather large, and made from
copper tubing. Tuning of the antenna looked to be a bit of a nightmare,
and it was rather a large design, made for durability and not exactly
something that was non intrusive.
If you want a commercial made antenna to cover all three bands, have a
look at the antenna manufacturer sites - I have a couple of diamond
antennas and have been very happy with them, and I am positive that they
sell a couple of triband base antenna that cover 6, 2, and 70. Probably
will not be cheap, but will definitely provide much better performance
than a discone or a jpole - I think you can probably look around the
AS$300 mark for one - DSE do stock a variety of Diamond, as do most of
the AR shops around. Don't limit your choice to the one brand though -
comet are supposed to make a pretty decent antenna as well, and there
are other manufacturers around that are also worth looking at.
Another option is to look at using a mobile antenna (and a radial ground
plane if mounting up on a pole) which is what I am in the process of
doing (when the antenna arrives in country that is) - just had a look,
and DSE have one with OK gain covering the three bands you are
interested in for $149 (cat # D4818). I am not in a position to put up
a decent base antenna, and am running a variety of antennas - 1/4 waves,
a discone, and shortly a dual band mobile on a pole, so if you look
around, have a play with what is available, you will find something to
suit your needs.
discone on 2m and 70cm. If you look around on the net (i.e. qsl.net)
you can find many variants that are designed to cover 2m and 70cm, but I
have seen only a few that are designed to cover all three bands. I did
a search about a year ago and ended up finding a site with all the
designs and info/advice on how to build one, but I don't think I
bookmarked that one because at the time I was looking to find jpoles
made from 300 ohm ribbon, and this one was rather large, and made from
copper tubing. Tuning of the antenna looked to be a bit of a nightmare,
and it was rather a large design, made for durability and not exactly
something that was non intrusive.
If you want a commercial made antenna to cover all three bands, have a
look at the antenna manufacturer sites - I have a couple of diamond
antennas and have been very happy with them, and I am positive that they
sell a couple of triband base antenna that cover 6, 2, and 70. Probably
will not be cheap, but will definitely provide much better performance
than a discone or a jpole - I think you can probably look around the
AS$300 mark for one - DSE do stock a variety of Diamond, as do most of
the AR shops around. Don't limit your choice to the one brand though -
comet are supposed to make a pretty decent antenna as well, and there
are other manufacturers around that are also worth looking at.
Another option is to look at using a mobile antenna (and a radial ground
plane if mounting up on a pole) which is what I am in the process of
doing (when the antenna arrives in country that is) - just had a look,
and DSE have one with OK gain covering the three bands you are
interested in for $149 (cat # D4818). I am not in a position to put up
a decent base antenna, and am running a variety of antennas - 1/4 waves,
a discone, and shortly a dual band mobile on a pole, so if you look
around, have a play with what is available, you will find something to
suit your needs.
Matt
Jason Brown <jb...@hootmail.com> wrote in message
news:jZTq8.29161$uR5....@newsfeeds.bigpond.com...
Jason Brown
Apr 4, 2002, 7:05:19 AM4/4/02
to
Hi and thanks for the reply. I have seen the tri band mobile antenna you
have reffered to at DSE, although from first impressions, it seems very
expensive for a mobile antenna. I may look it again actually, I didn't
think mobiles would work that great; or perhaps stick to a higher gain dual
band antenna. Due to space limitiations however, I can't put up many
antennas so I was hoping for one that covered most of the bands I operate
on. As for the jpole, I am using the 300ohm tv ribbon cable at the moment,
and I msut say, it works great - might be my location? As for that other
jpole you were referring to, I think I have seen it also - it is a copper
jpole made from copper pipe. The article is available at www.eham.net -
click on articles and then antenna articles... seems like a good project. I
would be interested to hear your opinion with regard to comparing one of
those dual band mobile antennas with the jpole perhaps if you can. I'm only
new to all this, so I really don't have the experience to compare antennas
etc. Thanks again for the reply.
have reffered to at DSE, although from first impressions, it seems very
expensive for a mobile antenna. I may look it again actually, I didn't
think mobiles would work that great; or perhaps stick to a higher gain dual
band antenna. Due to space limitiations however, I can't put up many
antennas so I was hoping for one that covered most of the bands I operate
on. As for the jpole, I am using the 300ohm tv ribbon cable at the moment,
and I msut say, it works great - might be my location? As for that other
jpole you were referring to, I think I have seen it also - it is a copper
jpole made from copper pipe. The article is available at www.eham.net -
click on articles and then antenna articles... seems like a good project. I
would be interested to hear your opinion with regard to comparing one of
those dual band mobile antennas with the jpole perhaps if you can. I'm only
new to all this, so I really don't have the experience to compare antennas
etc. Thanks again for the reply.
"Matt" <doormat...@bigpond.com> wrote in message
news:kEWq8.29340$uR5....@newsfeeds.bigpond.com...
Matt
Apr 4, 2002, 8:52:46 AM4/4/02
to
I forgot to mention that I also have (and use) a couple of jpoles. In
theory (and also in my opinion) they outperform a 1/4 wave antenna, and
make an excellent portable antenna be it hung from the roof of your
hotel room, or suspended from a tree. I haven't compared a standard
commercial dualband antenna to a jpole, but I believe that the
commercial ones (even a mobile with some radials) will outperform a
jpole - hopefully I will have one up and running in the not to distant
future to be able to compare it. The DSE antenna is a bit cheaper than
the one I am getting - the Diamond SGC7900 which appears to be the
highest gain dual band mobile I can get hold of - and that will be
costing me $200 plus P&P, and that doesn't cover 6m (not licenced for 6m
operation anyway, so it doesn't bother me that much). I could put up my
base dualband antenna, but where I am located is rather cyclone prone,
and I am away for long periods of time, so I wanted something that would
have high performance (hopefully), and not cause damage if it gets blown
over (pretty bad blow if it can do that!), and I believe that I have it
with the 7900. Mind you, everyone has different needs, so pick what
suits you.
theory (and also in my opinion) they outperform a 1/4 wave antenna, and
make an excellent portable antenna be it hung from the roof of your
hotel room, or suspended from a tree. I haven't compared a standard
commercial dualband antenna to a jpole, but I believe that the
commercial ones (even a mobile with some radials) will outperform a
jpole - hopefully I will have one up and running in the not to distant
future to be able to compare it. The DSE antenna is a bit cheaper than
the one I am getting - the Diamond SGC7900 which appears to be the
highest gain dual band mobile I can get hold of - and that will be
costing me $200 plus P&P, and that doesn't cover 6m (not licenced for 6m
operation anyway, so it doesn't bother me that much). I could put up my
base dualband antenna, but where I am located is rather cyclone prone,
and I am away for long periods of time, so I wanted something that would
have high performance (hopefully), and not cause damage if it gets blown
over (pretty bad blow if it can do that!), and I believe that I have it
with the 7900. Mind you, everyone has different needs, so pick what
suits you.
Matt
Jason Brown <jb...@hootmail.com> wrote in message
news:3fXq8.29399$uR5....@newsfeeds.bigpond.com...
Jason Brown
Apr 4, 2002, 9:04:30 PM4/4/02
to
Thanks for the informatio Matt, you have raised some very interesting
points. I guess I will have to just find something decent for the 2/70 band
and maybe find something else for six... pity I can't find any mobile arials
for six... maybe I'll convert some old antenna.
points. I guess I will have to just find something decent for the 2/70 band
and maybe find something else for six... pity I can't find any mobile arials
for six... maybe I'll convert some old antenna.
"Matt" <doormat...@bigpond.com> wrote in message
news:2OYq8.29472$uR5....@newsfeeds.bigpond.com...
Doug
Apr 5, 2002, 1:47:40 AM4/5/02
to
Regarding a mobile antenna that can be used on 6 metres, try the 2 metre
5/8th (DSE D-4207).
It works out to be close to a 1/4wave on 6 and gave a 1.2:1 SWR the last
time I looked !
Certainly it's worth a try, but just remember to make sure that you have a
suitable ground plane size at 50MHz. Alternatively, there is a 6 metre
aluminium JPole design on my web site at
http://www.ozhelpservices.com/vk4adc.htm
5/8th (DSE D-4207).
It works out to be close to a 1/4wave on 6 and gave a 1.2:1 SWR the last
time I looked !
Certainly it's worth a try, but just remember to make sure that you have a
suitable ground plane size at 50MHz. Alternatively, there is a 6 metre
aluminium JPole design on my web site at
http://www.ozhelpservices.com/vk4adc.htm
73 Doug
"Jason Brown" <jb...@hootmail.com> wrote in message
news:Rx7r8.29753$uR5....@newsfeeds.bigpond.com...
Jason Brown
Apr 5, 2002, 4:12:28 AM4/5/02
to
Hi Doug, and thanks for the much needed info. I actually was thinking of
that same 5/8th mobile antenna, but wasn't sure if it would act as a 1/4
wave for 6 meters. I think I will look into that... seems like a more
reasonable price when compared to the tri band mobile antenna DSE sell, with
about 2.1dbi on 6m - although I'm not sure of its actual performance
however. Thanks for the info on the j pole for 6 too! looks great, i must
say that the 2/70cm jpole im using does work good, so if thats any
indication,then I will have to look into the 6m verison. Thanks again!
that same 5/8th mobile antenna, but wasn't sure if it would act as a 1/4
wave for 6 meters. I think I will look into that... seems like a more
reasonable price when compared to the tri band mobile antenna DSE sell, with
about 2.1dbi on 6m - although I'm not sure of its actual performance
however. Thanks for the info on the j pole for 6 too! looks great, i must
say that the 2/70cm jpole im using does work good, so if thats any
indication,then I will have to look into the 6m verison. Thanks again!
"Doug" <do...@ozhelpservices.com> wrote in message
news:gMbr8.21166$hi7....@news-server.bigpond.net.au...
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