[TowerTalk] Harmonics rectification in bearings or Pro.Sis. Tel rotors?

[Richard (Rick) Karlquist]

A long time ago I had a Rohn 25 tower with a Yagi on top turned
by a Ham-M rotor.  I experienced severe TVI on channel 2.  Somehow,
I don't know why, I got the idea that the bearings were rectifying.
I put a jumper loop of wire across the two halves of the Ham-M
and the TVI completely disappeared and never returned.

Rick N6RK

> On 2/8/2020 03:42, SM0HRP Kari Gustafsson wrote:
>> Hi,
>>
>> I have discovered what it seems like rectification in my HD Alu Tower 
>> where
>> on the top there is antenna ball bearing thrust (SKF) below a 61D 
>> Prosistel
>> rotor. I used various techniques to pin poin to the tower.
>>

>> 73s Kari SM0HRP
>>