- 1. [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: Kipton Moravec <kip@kdream.com>
- Date: Thu, 02 Sep 2010 08:32:13 -0500
- I am building an antenna rotor for a HF antenna. How fast should the antenna rotate? Looking at the motor/gear they have now it looks like it will rotate at 10 RPM, which means 6 seconds to go end to
- /archives//html/Towertalk/2010-09/msg00062.html (7,811 bytes)
- 2. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Jorge Diez - CX6VM" <cx6vm.jorge@adinet.com.uy>
- Date: Thu, 2 Sep 2010 10:48:03 -0300
- Hi Kip, You will sell this rotor or just for your own use? For large antennas is better to go slow. Thinking in 80 mts yagi, 4 elements 40 mts yagi, long boom 20, 15 and 10 mts yagi´s. Middle antenna
- /archives//html/Towertalk/2010-09/msg00063.html (8,905 bytes)
- 3. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Michael Baker" <k7dd@cox.net>
- Date: Thu, 2 Sep 2010 06:44:21 -0700
- Generally, 3/4 to 2 RPM is the range. The slower speed is for BIG HEAVY antennas so you have less torque to deal with. Most commercial rotors are about 1 RPM. If you are making one with a two speed s
- /archives//html/Towertalk/2010-09/msg00064.html (8,555 bytes)
- 4. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
- Date: Thu, 2 Sep 2010 09:01:49 -0500
- Variable speed centered around 1-2 rpm is probably best. Suggest some kinda of a coaster brake or delay brake. The faster you try to go will depend also on array construction. To survive faster means
- /archives//html/Towertalk/2010-09/msg00066.html (9,037 bytes)
- 5. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Stan Stockton" <k5go@cox.net>
- Date: Thu, 2 Sep 2010 09:26:49 -0500
- Kip, I believe the best system is one like Green Heron Engineering offers which will allow you to ramp the speed up at the beginning of rotation and ramp down toward the end of rotation - all program
- /archives//html/Towertalk/2010-09/msg00069.html (9,606 bytes)
- 6. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: GALE STEWARD <k3nd@yahoo.com>
- Date: Thu, 2 Sep 2010 08:24:49 -0700 (PDT)
- My Prop Pitch rotator takes about 90 seconds to go end-to-end. It's a bit slow for DX contesting but I'm used to it. I'm planning to install another tribander pointed S/SE. That way during the day (a
- /archives//html/Towertalk/2010-09/msg00071.html (10,800 bytes)
- 7. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "DF3KV" <df3kv@t-online.de>
- Date: Thu, 2 Sep 2010 20:10:38 +0200
- I found 40 seconds for one rotation real nice for contesting after I built my own rotator. I turned a christmas tree of 5 element yagis 20-10m + 3L FS on 40m without problems, but the stress on the d
- /archives//html/Towertalk/2010-09/msg00075.html (9,443 bytes)
- 8. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Jim Hargrave" <w5ifp@gvtc.com>
- Date: Thu, 2 Sep 2010 14:25:13 -0500
- Kip, You can't just pick a speed and have it fit all antennas. You have to consider the antenna and its weight/size/mechanical construction. If you run it too fast there will be a strain on the anten
- /archives//html/Towertalk/2010-09/msg00082.html (10,420 bytes)
- 9. [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Jim Thomson" <jim.thom@telus.net>
- Date: Fri, 3 Sep 2010 04:46:38 -0700
- I found 40 seconds for one rotation real nice for contesting after I built my own rotator. I turned a christmas tree of 5 element yagis 20-10m + 3L FS on 40m without problems, but the stress on the d
- /archives//html/Towertalk/2010-09/msg00103.html (8,963 bytes)
- 10. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
- Date: Fri, 03 Sep 2010 08:35:28 -0400
- I used the PST-61 to turn http://www.rogerhalstead.com/ham_files/Tower29.htm which takes about 90 seconds per revolution, BUT as it has 520 degree rotation any particular direction is usually no more
- /archives//html/Towertalk/2010-09/msg00106.html (10,305 bytes)
- 11. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "DF3KV" <df3kv@t-online.de>
- Date: Fri, 3 Sep 2010 14:58:44 +0200
- Hi Jim, My drive motors usually are 3-phase 400V, so I have no problem to use automated ramping with a cycle inverter now. But first I need to add an additional position indicator to supply informati
- /archives//html/Towertalk/2010-09/msg00108.html (10,598 bytes)
- 12. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Jim Hargrave" <w5ifp@gvtc.com>
- Date: Fri, 3 Sep 2010 10:25:01 -0500
- Hi Peter, Looking at your pictures, it seems that you should be able to add a sprocket to the chain drive in your limit switch area. I had to do a similar thing to mine a few years back. My original
- /archives//html/Towertalk/2010-09/msg00112.html (13,645 bytes)
- 13. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
- Date: Fri, 03 Sep 2010 13:07:32 -0400
- Just as a suggestion, if using a pot like this, why not use a 3 turn or even 10- turn and calibrate a section to use for the 1 or 1 1/2 turns made by the rotator. The old Prosistel PST-61 used this s
- /archives//html/Towertalk/2010-09/msg00113.html (15,536 bytes)
- 14. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Gene Fuller" <w2lu@rochester.rr.com>
- Date: Fri, 3 Sep 2010 14:43:44 -0400
- I've posted this before but if you have the "small" prop pitch motor and it's bevel gear output, I found a good commercial gear that fits exactly. It says "Martin 35-36" on it. A good industrial supp
- /archives//html/Towertalk/2010-09/msg00117.html (17,894 bytes)
- 15. Re: [TowerTalk] Antenna Rotor Speed (score: 1)
- Author: "Jim Hargrave" <w5ifp@gvtc.com>
- Date: Fri, 3 Sep 2010 14:27:13 -0500
- Roger, Normally I would agree with your suggestion. However, the RotorEZ circuitry is designed to operate using the conventional feedback pot with the wiper grounded and each end of the pot is a feed
- /archives//html/Towertalk/2010-09/msg00119.html (10,441 bytes)
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