The PDF that Ken provided is the more comprehensive version of the NCJ article.
The attached also discusses some of the design considerations at VP6DX (2008). 73, — Eric K3NA > On Jul 30, 2023, at 12:03, KEN CARUSO <w...@comcast.net> wrote: > > Hi Dave, > > I have some design experience for POTS lightning protection. GDTs were > sometimes used but by the end of my design career we were using mostly solid > state devices (TVS and other SCR like devices). > > Our golden rule was to avoid turning common mode surges into differential > mode as even the solid state devices would have differing turn-on thresholds > which would result in higher voltage stresses on the downstream electronics. > This meant the protection would go only across tip to ring and never > tip-to-ground or ring to ground. GDT's were even worse in this respect. > > Having said that, I would recommend you dig around for articles written by > K3NA related to phased array receive antennas used on Ducie etc. He thought > through protection schemes that involved GDTs, Fuses and TVS solutions. Very > thorough designs. > > I remember his designs were documented in the Sept/Oct 2008 and Nov/Dec 2008 > NCJs but I was not able to find an archived copy on the web, though this > seems to be a version of what I remember: > > https://ncjweb.com/bonus-content/200807NCJVP6DXreceiveantenna1.pdf > > 73, > > Ken - WO1N > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector  _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
