1:1 Choke (aka: Line Isolator) for use on HF with up to 100w RF power. It's the same as a 1:1 Balun but with a length of RG58 coax and a PL259 connector rather than terminals at the opposite end. Ideal for placing in-line on aerial feeders.
Running UK legal power? We have a 400w QRO version, too!
Made (and used) by us - Be weary of any supplier who can't (or won't) tell you what's inside the box you buy!