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
On 8/24/2020 09:25, Phil Duff wrote:
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 rotor turns
that are fed to pulse counting circuitry in the rotor controller.
de NA4M
On 2020-08-24 10:30 AM, Joe wrote:
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 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 pot leads (at the rotator). Problem solved.
larryn7dd
-----Original Message-----
From: Jim Brown <jim@audiosystemsgroup.com>
To: topband@contesting.com
Sent: Sun, Aug 23, 2020 10:17 pm
Subject: Re: Topband: Rotator Potentiometer shunt fed twr
On 8/23/2020 2:39 PM, Phil Duff wrote:
Aren't most rotors and their masts normally grounded thru the rotor
body
and mast clamp & mounting bolts to their tower/support?
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
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