Author: Andree DL8LAS via Topband <topband@contesting.com>
Date: Sun, 23 Aug 2020 19:15:28 +0000 (UTC)
Hey, how can I protect my rotator from HF in the shunt fed tower , so that the poti or other electric doesn't burn in the rotator? 73 Andy DL8LAS _________________ Searchable Archives: http://www.con
Bypass the rotor with thick ground lead from the rotating pipe mast to the tower, use ceramic bypass capacitors on the pot contacts and MOVs or low voltage spark gaps to ground on all lines to the ro
Author: Jean-Paul Albert via Topband <topband@contesting.com>
Date: Sun, 23 Aug 2020 22:46:17 +0200
Hi Andy, I had the same problem. Twice. The only thing to do is to reduce power. For me, 1500 to 500. I tried many isolations or protections, no chance. So I changed to a vertical.... Best 73 Jean-Pa
Yes. This solves other issues. use ceramic bypass capacitors on the pot contacts and MOVs or low voltage spark gaps to ground on all lines to the rotor and controller. MOVs are a very bad idea, and I
Unclear how this might help? Aren't most rotors and their masts normally grounded thru the rotor body and mast clamp & mounting bolts to their tower/support? Have run 160m QRO shunt-fed tower with CD
Antenna current at the joint between the two pieces of the rotator is a common source of IMD, as first articulated by W3LPL (although he calls it something else). 73, Jim K9YC _________________ Searc
Author: Larry via Topband <topband@contesting.com>
Date: Sun, 23 Aug 2020 23:18:15 +0000 (UTC)
I use wire wound pots in both my rotators and have experienced problems with them burning out on certain TX frequencies. Wound some small toroid transformers and soldered them at each of the three p
Has anyone thought of trying to make up a rotor position indicator using like a home brew encoder as described in the latest QST? Joe WB9SBD On 8/23/2020 6:18 PM, Larry via Topband wrote: I use wire
At least 2 rotor manufacturers (Orion, Spid) have used a simple pulse encoder scheme for some time instead of a pot strip indicator. A magnetically actuated reed switch generates pulses when the rot
I fried the reed switch turns counter in my variable L tuned 80m dipole. A bozo moment at QRO way off tune. So, I think all sensors need protection from high RF fields. Grant KZ1W de NA4M Joe WB9SBD
Contact Norm's Rotor Service for advice. Normsrotorservice.com Roy Morgan K1LKY Western Mass _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
MOVs and shielded rotator cables are also recommended in the ARRL antenna book 20th edition and I use them for that purpose for decades. Andrees rotator cable canīt be laced to the tower as it is a t
Andy, I had two Yeasu rotators on my shunt-fed tower, one at 62 feet and one at 97 feet, for about 15 years and never had trouble, although I was just running 100 watts on 160 73, Pete N4ZR Check out
I have never had any problems with multiple rotors on my 100 ft shunt fed 45G tower. I have had Ham IVs, Tail Twisters, an M2 2800, and now a prop pitch from K7NV. I run full power on 160 and always