Insert this high quality isolation balun into the coaxial feed line between the HF transceiver and the antenna tuner.
The Isolation Balun will reduce and in many cases completely eliminate HF radio transmissions interfering with vessel electronics, in particular the auto pilot.
It will also permit the antenna system comprising the backstay, tuner and RF ground to work more efficiently. This translates into weaker signals heard and greater transmit range.
For best performance, connect the Isolation Balun as close as possible to the tuner.
Handcrafted in the USA to the highest standards and used extensively at Pacific Maritime Radio's coast station, I strongly recommend this product.