Visit the Team Iceshanty Proshop
I've seen a number of people who say they like to "crank the gain" in order to cause interference if someone is fishing too close to them. Sounds like you've seen the same thing, always good for a laugh when you mention how it actually works but they swear up and down they are really sticking it to those people who dare to fish too close to them.
Livescope in forward view does effectively do that!
I 2nd this opinion, I use a Garmin Striker4 portable with ice ducer, my old Marcum VX-1P is gathering dust...Garmin has same features as Humminbird Helix with A-scope & seeing the history graph is like he said you can see a fish at your bait.Also these modern digital finders appear to not get much interference from the old style flashers, but my VX-1P bothers those with Vex terrible, have to gain way down.Fro the price point, I'd steer clear of Vex and go with Helix or Striker4 IMO.
Too late, I already bought the FLX-30 from a friend. He paid full price, I didn’t.With the exception of fishing for white perch at Hathaway for 2 days this week, I’m not usually around anyone.