Hi Pete,
Symmetrical T-verticals offer a performance improvement over inverted-L verticals but with a major downside if you operate on the higher bands. If the flat top of the T-vertical is near resonance on any HF band is will significantly degrade the performance of any Yagi antenna within hundreds of feet of the flat top. My recommendation: if you're serious about the HF bands don't use a T-vertical unless you can locate it far from your Yagis. I learned this lesson the hard way years ago with a 70 foot flat top on my T-vertical I totally trashed my 3 element 40 meter Yagis hundreds of feet away. 73 Frank W3LPL ----- Original Message ----- From: "N4ZR" <[email protected]> To: "topband reflector" <[email protected]> Sent: Tuesday, February 18, 2020 4:45:27 PM Subject: Topband: T-loaded vertical I keep seeing references to people using symmetrical wire top loading instead of the single wire of an inverted L. My question is how to calculate the appropriate length for the two top-loading wires. -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
