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Antenna in a flagpole

A

am1670acr

Guest
Our 16 foot flagpole (30 years old) is leaning over after a recent windstorm. I would like to put up a new one and possibly put my transmitter inside of it, since the opportunity has presented itself. I have read Carl's posts about putting an antenna inside of a flagpole, has anyone else been successful with this idea? I have also read what some Hams have done for HF antennas.

I have a RangeMaster and I would like to mount it at the base in a "planter box". I am considering making the flagpole out of a rigid non-conductive mast, most likely a rigid (if there is such a beast) PVC pipe and put my antenna inside of it. If the original flagpole was closer to 3 meters, I would simply replace it with an aluminum mast and "load" it, but a 16 foot radiator for LPAM is too "iffy".
 
I had an engineer friend of mine build a 20-ft top loaded vertical for LPAM and it works fine. It consists of four 2-inch copper pipes that screw together with a large loading coil near the top. This location is much more efficient than base loading. We also have four 10-ft CB whips mounted horizontally at 90-degree angles at the very top to act as a capacitive top hat. This was designed as a portable antenna that can be moved about. I have some pictures I could send anyone that is seriously interested in building one of these Dreko-Antennas. I tried to get my engineer friend to build them for sale but he said he doesn't have time for that.

Oldies Guy


> Our 16 foot flagpole (30 years old) is leaning over after a
> recent windstorm. I would like to put up a new one and
> possibly put my transmitter inside of it, since the
> opportunity has presented itself. I have read Carl's posts
> about putting an antenna inside of a flagpole, has anyone
> else been successful with this idea? I have also read what
> some Hams have done for HF antennas.
>
> I have a RangeMaster and I would like to mount it at the
> base in a "planter box". I am considering making the
> flagpole out of a rigid non-conductive mast, most likely a
> rigid (if there is such a beast) PVC pipe and put my antenna
> inside of it. If the original flagpole was closer to 3
> meters, I would simply replace it with an aluminum mast and
> "load" it, but a 16 foot radiator for LPAM is too "iffy".
>
 
Hello,

I would be interested in High quality pictures of the 20ft antenna.

send to kc8gpd28{at}earthlink{dot}net

Thanks,<P ID="signature">______________
Rev. Robert P. Chrysafis
Universal Life Ministries (ULC)

http://www.freecycle.org
Join the FreeCycle Revolution</P>
 
> Our 16 foot flagpole (30 years old) is leaning over after a> recent windstorm. I would like to put up a new one and> possibly put my transmitter inside of it, since the> opportunity has presented itself. I have read Carl's posts> about putting an antenna inside of a flagpole, has anyone> else been successful with this idea? I have also read what> some Hams have done for HF antennas. > > I have a RangeMaster and I would like to mount it at the> base in a "planter box". I am considering making the> flagpole out of a rigid non-conductive mast, most likely a> rigid (if there is such a beast) PVC pipe and put my antenna> inside of it. If the original flagpole was closer to 3> meters, I would simply replace it with an aluminum mast and> "load" it, but a 16 foot radiator for LPAM is too "iffy".> I seriously doubt that this will work for a Rangemaster.This works with the type of antenna I build and the sstran or metzo, or am88 etc, but the way the Rangemaster is built, I can't see this being a good thing for you.>>>>>>>The Rangemaster needs to be hoisted high above your head, whereas traditional AM transmitters concentrate on ground waves.>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>For me, the idea worked because I used 2, then 3 inch pipe as I experimented with it; trick is to make it look like a flagpole, and if you don't have to make it look like one, you can do anything you wish.....but putting a CB antenna into a piece of PVC, in my opinion, will not work for you. The CB antenna simply has no surface area for broadcast and requires free-air to send out it's signal.>>>The Rangemaster doesn't utilize a ground system, but if it did, and if it used a copper antenna/coil system, then the flagpole idea would work well for you.>>>>>>>>in this case, it would be interesting if you did load an aluminum flag pole....I know it can be done cause it has been done commercially, but I don't think the Rangemaster can do this....it wasn't built to do that.Hope this info [email protected]<P ID="signature">______________
[email protected], [email protected],[email protected]</P>
 
The RangeMaster doesn't utilize a ground system???

>> Our 16 foot flagpole (30 years old) is leaning over after
>> a recent windstorm. I would like to put up a new one and
>> possibly put my transmitter inside of it, since the
>> opportunity has presented itself. I have read Carl's posts
>> about putting an antenna inside of a flagpole, has anyone
>> else been successful with this idea? I have also read what
>> some Hams have done for HF antennas. I have a
>> RangeMaster and I would like to mount it at the base in a
>> "planter box". I am considering making the flagpole out of
>> a rigid non-conductive mast, most likely a rigid (if there
>> is such a beast) PVC pipe and put my antenna inside of it.
>> If the original flagpole was closer to 3 meters, I would
>> simply replace it with an aluminum mast and "load" it, but
>> a 16 foot radiator for LPAM is too "iffy".



> I seriously doubt that this will work for a Rangemaster.
> This works with the type of antenna I build and the sstran
> or metzo, or am88 etc, but the way the Rangemaster is built,
> I can't see this being a good thing for you.

> The Rangemaster needs to be hoisted high above your head, whereas
> traditional AM transmitters concentrate on ground waves. For me, the
> idea worked because I used 2, then 3 inch pipe as I experimented
> with it; trick is to make it look like a flagpole, and if
> you don't have to make it look like one, you can do anything
> you wish.....but putting a CB antenna into a piece of PVC,
> in my opinion, will not work for you. The CB antenna simply
> has no surface area for broadcast and requires free-air to
> send out it's signal. The Rangemaster doesn't utilize a
> ground system, but if it did, and if it used a copper
> antenna/coil system, then the flagpole idea would work well
> for you. In this case, it would be interesting if you
> did load an aluminum flag pole....I know it can be done
> cause it has been done commercially, but I don't think the
> Rangemaster can do this....it wasn't built to do that.Hope
> this info [email protected]
>

Note the information on the RangeMaster webpage, the RangeMaster does need a ground system to take advantage of the ground wave.
http://www.am1000rangemaster.com/groundxmit.html
 
Re: The RangeMaster doesn't utilize a ground system???

On the Rangemaster, the ground is on the bottom of the case. And, yes, it needs a good ground to achieve any range.

> Note the information on the RangeMaster webpage, the
> RangeMaster does need a ground system to take advantage of
> the ground wave.
> http://www.am1000rangemaster.com/groundxmit.html
>
<P ID="signature">______________
Frank
East Hill Radio

Moderator, Community Radio USA, Seattle</P>
 
> I had an engineer friend of mine build a 20-ft top loaded
> vertical for LPAM and it works fine. It consists of four
> 2-inch copper pipes that screw together with a large loading
> coil near the top. This location is much more efficient than
> base loading. We also have four 10-ft CB whips mounted
> horizontally at 90-degree angles at the very top to act as a
> capacitive top hat. This was designed as a portable antenna
> that can be moved about. I have some pictures I could send
> anyone that is seriously interested in building one of
> these Dreko-Antennas. I tried to get my engineer friend to
> build them for sale but he said he doesn't have time for
> that.
>
> Oldies Guy
>
>
> > Our 16 foot flagpole (30 years old) is leaning over after
> a
> > recent windstorm. I would like to put up a new one and
> > possibly put my transmitter inside of it, since the
> > opportunity has presented itself. I have read Carl's posts
>
> > about putting an antenna inside of a flagpole, has anyone
> > else been successful with this idea? I have also read what
>
> > some Hams have done for HF antennas.
> >
> > I have a RangeMaster and I would like to mount it at the
> > base in a "planter box". I am considering making the
> > flagpole out of a rigid non-conductive mast, most likely a
>
> > rigid (if there is such a beast) PVC pipe and put my
> antenna
> > inside of it. If the original flagpole was closer to 3
> > meters, I would simply replace it with an aluminum mast
> and
> > "load" it, but a 16 foot radiator for LPAM is too "iffy".
> >Hey one day when Im not such a loser at having money, which will probably be never, would love some pics of this [email protected]
>
 
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