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- Thu Aug 03, 2017 2:06 pm
- Forum: Technical Tips, Questions & Discussions (Computers & Internet)
- Topic: Another Mechanical Engineering Question re: free-stand antenna mast
- Replies: 2
- Views: 7057
Re: Another Mechanical Engineering Question re: free-stand antenna mast
I would definitely use steel. You might take a look at how HVAC jacks are made. They don't go up 70' but they are made of square steel and are telescopeing. They have a crank similar to a boat winch to extend them. You might consider a small ATV winch like the ones sold at harbor Freight as a 70' leach will be heavy.