seagullsnacker
iGull
Don't know anything about them. But from a quick look at their site, encouraging that they're willing to point out the value of a balun, etc.
Baluns again a used and abused item…used for matching impedance of an aerial to the feed and/or preventing common mode interference being fed back to the receiver and so increasing noise floor…simple explanations of how they work are, in my Ham experience, often side of the mark; I’ve made and used many but the why and wherefore are a complex subject indeed