[TowerTalk] TowerTalk Digest, Vol 42, Issue 63

Nick Pair daweezil2003 at yahoo.com
Tue Jun 20 22:34:26 EDT 2006

Paul K7HSV,
  Sounds like you are experiencing voltage drop at the tower base. When you try to raise the tower the current draw of the winch motor is droping the line voltage to the tower below where the coil on the relay can hold the contacts in. I've seen this many times on remote contactors. Check voltage with the contactor held in and I think you will be surprised how low it drops under load. The only cure is a larger feed to the tower, which will also help the lifetime of lift motor which really dislikes anything greater than about 5% lower than nameplate rating. Lower voltage always means higher current for same load.
  Good luck,
  Nick WB7PEK

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