[TowerTalk] Mast for a short little stack

[AB2E Darrell]

Hi Pete,
Putting up a 99% identical setup here!
AB-577
F12 C3SS
M2 6M5X (5el 6m yagi).

An aluminum mast should be fine rather than steel.
We have a 6ft mast from FD, I thought I would try that, it should probably work fine.
6M yagi at the top, C3SS just above the G800DX rotor being added at the top piece
of the AB-577.
Do you have a local industrial supply place nearby>?
I'm fortunate to have one, and they already sold me 12ft double wall T6061 aluminum mast,
although I bought this to use as a gin pole for a future project.

As an aside, I plan on replacing the metal cable of the guys with Phillystran of equal size.
Initially, it looks like 1200lb Phillystran will be a close match to the cable diameter on the AB-577.
Some have reported interaction with the original guys, and I believe we may have experienced this
issue as well at FD.

73 and best of luck with the project!
Darrell AB2E

________________________________
From: TowerTalk <towertalk-bounces at contesting.com> on behalf of Pete Smith N4ZR <pete.n4zr at gmail.com>
Sent: Wednesday, August 24, 2022 5:27 PM
To: TowerTalk <TowerTalk at contesting.com>
Subject: [TowerTalk] Mast for a short little stack

I have a F12 C-3E on an AB-577.  The tribander mounts on a very short
stub mast out the top of the Yaesu rotator.  There is no thrust bearing
or other support for the mast.

I recently bought a Cushcraft 3-element 6-meter beam and want to stack
it about 5 feet above the tribander.  The antenna weighs about 7 pounds
and has very low wind loading.  A friend gave me a very heavy 8-foot
steel mast, which I thought would work, but after handling it for a
while (it's really heavy), I think it would be overkill, and very
awkward to install, even with two or three guys on ladders.  Cutting it
down would help marginally.

So I'm debating a lighter, thinner-walled steel or high-strength
aluminum mast instead.  Sitting just above the rotator's top clamp, the
tribander would impose very little bending load on the mast in the wind,
and the 6-meter yagi ought to be trivial in that regard too, at only 5-5
1/2 feet above the rotator.  I'd appreciate advice - am I better off
just suffering through the installation of the heavier mast, or if what
I'm proposing would work, what material do you suggest?

--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Freversebeacon.net%2F&data=05%7C01%7C%7C61608826521843dd6feb08da86189279%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637969737399515025%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=1EzzS%2FjnvDKdGkKI%2BZZh2s3Pa07Zf3Dl5xTiqnPxsXQ%3D&reserved=0>.
For spots, please use your favorite
"retail" DX cluster.
_______________________________________________



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________________________________
From: TowerTalk <towertalk-bounces at contesting.com> on behalf of Pete Smith N4ZR <pete.n4zr at gmail.com>
Sent: Wednesday, August 24, 2022 5:27 PM
To: TowerTalk <TowerTalk at contesting.com>
Subject: [TowerTalk] Mast for a short little stack

I have a F12 C-3E on an AB-577.  The tribander mounts on a very short
stub mast out the top of the Yaesu rotator.  There is no thrust bearing
or other support for the mast.

I recently bought a Cushcraft 3-element 6-meter beam and want to stack
it about 5 feet above the tribander.  The antenna weighs about 7 pounds
and has very low wind loading.  A friend gave me a very heavy 8-foot
steel mast, which I thought would work, but after handling it for a
while (it's really heavy), I think it would be overkill, and very
awkward to install, even with two or three guys on ladders.  Cutting it
down would help marginally.

So I'm debating a lighter, thinner-walled steel or high-strength
aluminum mast instead.  Sitting just above the rotator's top clamp, the
tribander would impose very little bending load on the mast in the wind,
and the 6-meter yagi ought to be trivial in that regard too, at only 5-5
1/2 feet above the rotator.  I'd appreciate advice - am I better off
just suffering through the installation of the heavier mast, or if what
I'm proposing would work, what material do you suggest?

--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Freversebeacon.net%2F&data=05%7C01%7C%7C61608826521843dd6feb08da86189279%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637969737399515025%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=1EzzS%2FjnvDKdGkKI%2BZZh2s3Pa07Zf3Dl5xTiqnPxsXQ%3D&reserved=0>.
For spots, please use your favorite
"retail" DX cluster.
_______________________________________________



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TowerTalk mailing list
TowerTalk at contesting.com
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.contesting.com%2Fmailman%2Flistinfo%2Ftowertalk&data=05%7C01%7C%7C61608826521843dd6feb08da86189279%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637969737399515025%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=9wpcpHqdi2gtONU%2BSJzK9BPCswVV%2FhrlqEKNf9HcghY%3D&reserved=0