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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+US\s+Tower\s+Up\/Down\s+Raising\s+Fixture\s+\(MD\-750\)\s+Motor\s+Switch\s*$/: 10 ]

Total 10 documents matching your query.

1. [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Roger White <rwhitetexas@verizon.net>
Date: Tue, 1 Jan 2019 17:25:55 +0000 (UTC)
I have had my switch located on the bottom section of theHDX-555 tower for many years in a weather proof enclosure. Same cable length as from the factory. I want tolocate it approximately 25 feet fur
/archives//html/Towertalk/2019-01/msg00000.html (6,992 bytes)

2. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Patrick Greenlee <patrick_g@windstream.net>
Date: Tue, 1 Jan 2019 12:45:49 -0600
As you mention, upsize the wire and operate in the dry. This assumes that you aren't at the ragged edge of too much wire loss now. Probably not but you could grab a meter and make sure. Patrick NJ5G
/archives//html/Towertalk/2019-01/msg00002.html (8,231 bytes)

3. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Tue, 1 Jan 2019 11:03:12 -0800
Patrick        NJ5G The trouble with what you describe is that if the relay sticks on, you are too far away from the tower to kill the power and stop the motor. The type of relay used is the same as
/archives//html/Towertalk/2019-01/msg00003.html (8,347 bytes)

4. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Patrick Greenlee <patrick_g@windstream.net>
Date: Tue, 1 Jan 2019 15:21:37 -0600
I did not propose a relay. I was thinking of up-sizing the wire sufficiently to obviate a relay. I concur with your low opinion of the A/C contactors. I have replaced some of those too. Brute force s
/archives//html/Towertalk/2019-01/msg00004.html (9,483 bytes)

5. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Charles Gallo <charlie@thegallos.com>
Date: Tue, 1 Jan 2019 16:29:36 -0500
Had, I miss mercury wetted contactors. Carbon contactors also dont stick, but have higher resistance -- 73 de KG2V Charlie _______________________________________________ ____________________________
/archives//html/Towertalk/2019-01/msg00005.html (10,023 bytes)

6. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Tue, 1 Jan 2019 15:28:11 -0800
As built, the switch on the control box energizes the coil of a relay that carries the motor current. That is the relay that can stick. Are you saying you are going to run the motor current (not just
/archives//html/Towertalk/2019-01/msg00007.html (10,055 bytes)

7. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Patrick Greenlee <patrick_g@windstream.net>
Date: Tue, 1 Jan 2019 20:39:32 -0600
I should have not replied in haste to something of which I was not properly informed. Fast on the trigger but slow on the draw. That's no toes Pete. If the length of the run and required wire gauge w
/archives//html/Towertalk/2019-01/msg00009.html (10,887 bytes)

8. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: "john@kk9a.com" <john@kk9a.com>
Date: Wed, 2 Jan 2019 10:50:54 -0500
A long long time ago I had a US Towers 89' crankup. I had purchased a new home and moved the tower from my former residence. I installed the tower 350 feet from my home and could not get the motor to
/archives//html/Towertalk/2019-01/msg00012.html (12,732 bytes)

9. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Wed, 2 Jan 2019 11:47:39 -0500
My MD-750 is 350 feet from the shack, behind a stand of trees. I installed three conduit runs: one for RF coax/hardline, one for control cables and one for 240VAC (#10 conductors.) I put a subpanel a
/archives//html/Towertalk/2019-01/msg00013.html (14,725 bytes)

10. Re: [TowerTalk] US Tower Up/Down Raising Fixture (MD-750) Motor Switch (score: 1)
Author: Roger White <rwhitetexas@verizon.net>
Date: Wed, 2 Jan 2019 17:29:46 +0000 (UTC)
From what I gather on and off the list(s), since I am only moving the Dayton drum switch about 25 feet away from the motor, I should be OK with the gauge (or slightly larger diameter) of multi-strand
/archives//html/Towertalk/2019-01/msg00014.html (12,104 bytes)


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