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JJV
Premium
join:2001-04-25
Seattle, WA

30 foot mast?

Click for full size
I have a temporary antenna set up on a 3 story roof top.
The set up is a radiowavex G5RV with a light bulb / painter pole to hold it up. The base is a water filled non penetrating roof mount.
This has survived 2 years through some serious storms.

Im looking for a more professional looking mast in the 30 foot range to replace the painter pole. I would rather not use guy wires.

Any ideas?

Im looking at this or similar.

»www.3starinc.com/rohn_h30_telesc···ast.html

OregonBob

join:2008-10-14
Klamath Falls, OR

I got a 30 gallon oil drum from the Oil Can Henrys, the place that changes your cars oil. Free

3 bags of premix concrete at Home Depot, and a 22 foot top rail for chain link fence. About $20.

Just put the rail in the oil drum, ad the premix and water and let it set.

You have a portable mast that's pretty cheap.

Make two for your dipole.

Good Luck,
Bob



drjim
Premium,MVM
join:2000-06-13
Long Beach, CA
kudos:3
reply to JJV

The Rohn masts need guys or they'll bend up with a high wind.

OregonBob's suggestion is pretty good, but I'm not sure you'd need *quite* that much concrete!
--
One man's Magic is another man's Engineering.


JJV
Premium
join:2001-04-25
Seattle, WA
reply to JJV

I don't mind spending money for a professional product.

This 38 footer might work. I use the antenna in a inverted V position so the ends are only up about a foot.

»www.mgs4u.com/fiberglass-push-up···htm#38ft



drjim
Premium,MVM
join:2000-06-13
Long Beach, CA
kudos:3

I've bought quite a few things from Max Gain Systems, and I've been very satisfied with their products.

I'm sure that mast would be excellent quality.
--
One man's Magic is another man's Engineering.



Hank
Searching for a new Frontier
Premium
join:2002-05-21
Burlington, WV
kudos:2

1 edit
reply to JJV

Are your masts tied to building ground??



mattmag
Premium,ExMod 2000-03
join:2000-04-09
NW Illinois
kudos:3
reply to JJV



That 38 foot push-up requires guying as well.


JJV
Premium
join:2001-04-25
Seattle, WA
reply to Hank

Not yet



fifty nine

join:2002-09-25
Sussex, NJ
kudos:2
reply to JJV

I think that anything that tall (and thin) needs guying. I could be wrong but that's been my experience.


JJV
Premium
join:2001-04-25
Seattle, WA

The pole in the picture is extended to 26 feet. that seems to work well. Its just not pretty.



mattmag
Premium,ExMod 2000-03
join:2000-04-09
NW Illinois
kudos:3



Since you don't want to acknowledge the posts telling you that any *long* pole needs to be guyed, then quite frankly you need to decide which way you want it, and you can't have both.

Short mast = no guys

Tall mast = guys.



Hank
Searching for a new Frontier
Premium
join:2002-05-21
Burlington, WV
kudos:2

Fire marshal inspection and no building ground equals no mast - that's that short and long of it.


JJV
Premium
join:2001-04-25
Seattle, WA

I'm considering ordering 2 more of those water filled non penetrating roof mounts and just going with a 10 foot or so mast. Height = hassle.



mattmag
Premium,ExMod 2000-03
join:2000-04-09
NW Illinois
kudos:3



Well you're already 3 stories up, so its just a matter of getting the signal off the roof and you're all set.


tobicat
Premium
join:2005-04-18
Tombstone, AZ
reply to JJV

Reference grounding. i am gonna bet that that the access head that you have all the coax coming thru is grounded. So all you need to do is ground to that. Not that it will matter for a direct hit.
--
7000S SatMex 5 1050, Dlink wirless


JJV
Premium
join:2001-04-25
Seattle, WA

The conduit is grounded to a huge piece of copper down stairs. I have no idea where that copper runs but it likely finds earth somewhere.
The amp radio and tuner are electrically grounded in the radio room.
What would I ground to from the conduit upstairs? The mast will likely end up being fiberglass.



54067323

join:2012-09-25
Tuscaloosa, AL
reply to JJV

said by JJV:

Im looking for a more professional looking mast in the 30 foot range to replace the painter pole. I would rather not use guy wires.

Lots of low center of gravity non-pen mounts to select from here, most you just set in-place and add blocks.

»www.solidsignal.com/search/sr.as···1&cart=1

As for a pole you can use a Channel Master 40 foot pushup to about 25 feet unguyed without a problem.