Hey BigBean:
How did your test turn out? Here's a link to a Klein Pocket Coax Tester that might be of help to you now and any future coax issues you might encounter:
https://www.homedepot.com/p/Klein-To...dalType=drawer
I think that either the CM-7777 that Tyler the Antenna Man recommended or the Kitztech I mentioned above and others have recommended on this forum, would serve you better.
Keep the forum posted on your outcome as it would be of interest to me and others.
All the best.....