Topband: Rotator Potentiometer shunt fed twr

[Grant Saviers]

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 at audiosystemsgroup.com>
>>> To: topband at 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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