Hi Thanks for the replies, no I will be using radials on the ground, amount unknown,
Thanks Trevor EI2GLB ----- Original Message ----- From: "Mike Waters" <mikew...@gmail.com> To: "MR TREVOR DUNNE" <ei2...@eircom.net> Cc: "topband List" <TOPBAND@contesting.com> Sent: Friday, 15 September, 2017 18:56:59 Subject: Re: Topband: RF choke/balun If you're going with elevated radials, then a feedline choke is a must. Place it within a few feet of the feedpoint. Use four or five stacked 2.4" diameter #31 ferrite toroid cores with about six turns of coax wound through them. See K9YC's excellent reference to be sure. 73, Mike www.w0btu.com On Sep 15, 2017 9:24 AM, "MR TREVOR DUNNE" <ei2...@eircom.net> wrote: > Hi All > > I am planning on making an RD Choke for my 160m inverted L and was > wondering what others use, > > I was thinking of 3 stacked ft240-43 cores and maybe 10-12 turns of some > rg316 or the like small coax, > > With 61 or 31 be a better material to use and do I need more or less turns, > > I'm loosely working from the G3TXQ website where he did like of > measurements on different chokes, but not we're great on 160m, > > I'd like to end up with something like a balun design 1116d but with a lot > less money in it, > > Thanks > Trevor > EI2GLB > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband