Hi Wes, The issue here is that he is not over resonant radials and a balun which would likely call for what you suggest.
He's over an FCP roughly 130 ohms capacitive reactance and a true transformer which has normal residual inductance. Horizontal plus vertical from 140' to 155' is common for L/FCP cut for R=50 and X=whatever often corrected by a series cap. This extra length has the performance advantage of improving RF current density up high on the vertical wire. When an L and counterpoise are very efficient the ground characteristics and surroundings can "pull" the particulars. That is why the sweet length is a range instead of a singular value. 73, Guy K2AV On Monday, November 7, 2016, Wes Attaway (N5WA) <[email protected]> wrote: > I haven't run any numbers but it seems like you should just shorten the > horizontal wire (resonance freq is too low). I would go back to about 65' > horizontal. Somewhere in the range of 60' to 70' you should get close > enough. > > ------------------- > Wes Attaway (N5WA) > (318) 393-3289 - Shreveport, LA > Computer/Cellphone Forensics > AttawayForensics.com > ------------------- > > -----Original Message----- > From: Topband [mailto:[email protected] <javascript:;>] On > Behalf Of Art Heft > Sent: Monday, November 07, 2016 3:06 PM > To: [email protected] <javascript:;> > Subject: Topband: 160 m inverted L > > I finally got the inverted L up this afternoon. Vertical dimension is 65' > and the almost horizontal dimension is 95'. I am using a very carefully > built FCP and the commercial transformer. My SARK 110 shows resonance at > about 1.68 MHz but the resistive part is up around 1000 ohms. Taken right > at the antenna. Doesn't seem right to me. Any ideas? > 73, Art K8CIT Hillman MI > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > -- Sent via Gmail Mobile on my iPhone _________________ Topband Reflector Archives - http://www.contesting.com/_topband
