Is there another antenna on the tower near the beam or close by? If you have some type of wire antenna hanging on the tower maybe temporarily lower it to see it the SWR changes. That SWR change sounds pretty drastic.
-------- Original message --------
From: Bill Coleman <aa4lr@arrl.net>
Date: 12/4/20 1:37 PM (GMT-05:00)
To: South East Contest Club list <secc@contesting.com>
Subject: [SECC] Happenings at AA4LR - Good news and Bad news
Good news first. I scrambled up the tower this morning and re-installed my Cushcraft A3S/A743 before the rains came. (Indeed, that was hours ago and I’m still waiting on the rain) I wanted to get it off the ground before something happened to it after rebuilding.