I love the pipe mast and cable suspension.
Repurposing is FAR more fun than buying.
Did you know that the wooden flanges from RG6 thousand foot spools are an
EXACT fit in 25G tower?
Heavily oiled, they should last several years.
Bore out the center hole to fit your mast.
Heck, the plywood is even easy on galvanizing!
AND, the threaded neck of some large plastic jugs is the perfect diameter
and thickness to make a sleeve bearing for 1.5" EMT in a 2" top section
tube!
Don't forget the CX contest 9/15 and 9/22. See classicexchange.org
Wilson
W4BOH
-----Original Message-----
From: towertalk-request@contesting.com
Sent: Sunday, September 08, 2013 12:00 PM
To: towertalk@contesting.com
Subject: TowerTalk Digest, Vol 129, Issue 19
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Today's Topics:
1. Re: Ground level rotator mounting (scottw3tx@verizon.net)
2. Re: 1st list of Heliax stuff (Pete M)
----------------------------------------------------------------------
Message: 1
Date: Sat, 07 Sep 2013 21:03:13 -0400
From: "scottw3tx@verizon.net" <scottw3tx@verizon.net>
To: Jim Hargrave <w5ifp@gvtc.com>
Cc: "<towertalk@contesting.com>" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Ground level rotator mounting
Message-ID: <D36F508D-07D3-4F94-BA1C-2A00BD9D4E4D@verizon.net>
Content-Type: text/plain; charset=us-ascii
ON4UN has an excellent description of placing a rotor at ground level, with
a full height transmission shaft, in one of the earlier editions of Low Band
DXing.
Best regards,
Scott
On Sep 7, 2013, at 6:58 PM, "Jim Hargrave" <w5ifp@gvtc.com> wrote:
Doug,
i have a homebrewed kludge.
I have a Prop Pitch rotor mounted about 4 ft from the bottom of my 50Ft.
tower.
On the top is a TH6 about 4 ft above the tip of the tower.
10 ft above that is a 14 el 2m beam. Then 2 ft above that is a 144/220/440
J=Pole.
All above the tower rotates together.
My mast is made with sections of 1 1/2" Galvanized water pipe.
In my case, I installed/assembled the mast as I raised the tower.
After assembly I drilled each coupling and installed two 1/4" bolts to keep
the
threads from coming loose.
This is a very heavy setup. I have suspended the mast with steel cable
attached
near the bottom and about 20ft up the tower. I adjust the height with a
turnbuckle
until there is no weight on the rotor in the mid rotation. As it rotates it
actually
lifts the assembly slightly so the rotor never feels any weight through
the entire rotation.
I installed two Phenolic retaining plates (@20 & 40 ft) to keep the mast
centered.
These are about 6 in square with holes cut in the center and mounted with
angle
iron between tower legs. These are loose fit, nothing scientific.
This setup has been in continuous operation at this QTH since 1997.
73s de Jim
W5IFP
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com]On Behalf Of
Doug Wetzel
Sent: Friday, September 06, 2013 8:39 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Ground level rotator mounting
When I put up my HDBX-48 in the spring, I'm thinking of mounting the
rotator at ground level. Has anyone on the list done something similar?
What did you use for mast all the way up the tower, and did you use
multiple thrust bearings to align the mast?
Thanks in advance.
Doug
K7IP
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------------------------------
Message: 2
Date: Sun, 08 Sep 2013 09:18:04 -0400
From: Pete M <pmanfre@gmail.com>
To: TowerTalk@contesting.com, Moon-net <moon-net@googlegroups.com>,
Test Equip Trader <TestEquipTrader@yahoogroups.com>
Subject: Re: [TowerTalk] 1st list of Heliax stuff
Message-ID: <522C790C.2030207@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
10 Pieces Andrew L7PNM 1 5/8 " N male premium connector for LDF7-50 $9
each Will ship priority mail or FedEx. ( at cost of shipping)
20 pieces Commscope 1873ADM 1 5/8" DIN Male HELIAX Connector $4 each +
Shipping easily adapted to LDF7 ( remove teflon sleeve from connector)
20 Pieces Andrew L2PNM-HC Heliax connectors, for 3/8 inch cable New in
boxes. $2.50 each + Shipping
5 Pieces Andrew V7PDM-RPC Heliax connectors, for VXL7 Heliax $9 each +
Shipping
5 Pieces Andrew L6PDF-RPC Heliax connectors, for 1 1/4 Heliax $7 each +
Shipping
20 Pieces Andrew L6PDM-RPC Heliax connectors, for 1 1/4 Heliax $7 each
+ Shipping
10 pieces RFS LCF-12-50-7 1/2 inch heliax DIN FM connector fits Cellwave
LCF12-50 and will fit LDF4 also. $3 each + Shipping
6 Pieces 7/8 clamp on ground kit $2.50 each + Shipping
50 pieces Andrew SGL2-06B2 2 1/4 clamp ground kit ...EASILY usable on
all sizes, $3.50 each + Shipping
2 weeks for these. If not sold I will not list any more of these items,
even if I run into more. Please do not ask for this in the future,
After this week off to scrap barrel ... sorry. I will not sell anything
unless posted here. I will search special for a $1000 fee ...J , in
other words I really do not want to because it is all disorganized....as
I sort I post.
Next week I will post different items
Thanks for looking,
Pete WA2ODO
Deputy Sheriff, LACOSO
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