We have found this alternate procedure usually solves 40m SWR issues for most of our customers:

Before starting, mark the starting locations of the tubes and trap covers so that you can restore the lengths if necessary.

  1. Shorten the tubing adjustment between the 10m and 15m traps.
  2. Shorten the tubing adjustment between the 15m and 20m traps.
  3. Re-calibrate the 15m and 20m traps to offset the changes
  4. Return the resonant points on those bands back to where they were.

Remember, it should NEVER be necessary to cut any of the tubes on a BTV antenna in an effort to tune it.

Related Products: Antennas