[Towertalk] Ball bearings in pulleys

Roger rmurad@superig.com.br
Wed, 27 Nov 2002 11:30:51 +0000


All,
About these Gin poles:
- Antena Mart (Max Gain Systems) http://www.mgs4u.com/ginpole.htm
- IIX Equipment http://www.w9iix.com
- Rohn

And this device:
- Tower Block http://www.superiormusic.com/towerjack_towerblock.htm

Question:
Is there a ball bearing inside the pulley of the head of these ginpoles and 
the pulley of Tower Block?
TIA de Roger - PY1OL