Re: Topband: 160M Inverted-L Radial Question
Here is a great reference for you Mark - Antennas By N6LF | | | | || | | | | | Antennas By N6LF Antenna design ideas for radio amateurs by Rudy Severns N6LF | | | | From: Mark K3MSB To: topBand List Sent: Monday, September 26, 2016 9:33 AM Subject: Topband: 160M Inverted-L Radial Question I've been doing some reading on elevated radials for Inverted-L antennas. The existing literature seems to fall into two types; ground radials where the feed point is very close the ground, and systems were the feed point is elevated at the height of the radials. My Inverted-L is 50 feet high and has the feed point in a box at ground level. I'm considering using 2 elevated radials so as to reduce the radial field next to my new (hopefully) RX antenna (BOG). Since I don't want to raise my feed point by 5 feet and thereby decrease the vertical part of the Inverted L accordingly, I was considering using a pair of elevated radials (5 feet high -- don't know the exact height yet). I was planning on the radials sloping up 45 degrees from the base of the Inverted-L to my radial height. The radials will not be straight, but will have doglegs due to property constraints. I haven't found any literature that addresses this consideration. Comments? 73 Mark K3MSB _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160M Inverted-L Radial Question
Hi Mark, The sloping radials you're proposing to use also have the affect of shortening the effective length of your vertical, just as if you had raised the feed point. 73 Frank W3LPL - Original Message - From: "Mark K3MSB" To: "topBand List" Sent: Monday, September 26, 2016 2:33:54 AM Subject: Topband: 160M Inverted-L Radial Question I've been doing some reading on elevated radials for Inverted-L antennas. The existing literature seems to fall into two types; ground radials where the feed point is very close the ground, and systems were the feed point is elevated at the height of the radials. My Inverted-L is 50 feet high and has the feed point in a box at ground level. I'm considering using 2 elevated radials so as to reduce the radial field next to my new (hopefully) RX antenna (BOG). Since I don't want to raise my feed point by 5 feet and thereby decrease the vertical part of the Inverted L accordingly, I was considering using a pair of elevated radials (5 feet high -- don't know the exact height yet). I was planning on the radials sloping up 45 degrees from the base of the Inverted-L to my radial height. The radials will not be straight, but will have doglegs due to property constraints. I haven't found any literature that addresses this consideration. Comments? 73 Mark K3MSB _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 160M Inverted-L Radial Question
I've been doing some reading on elevated radials for Inverted-L antennas. The existing literature seems to fall into two types; ground radials where the feed point is very close the ground, and systems were the feed point is elevated at the height of the radials. My Inverted-L is 50 feet high and has the feed point in a box at ground level. I'm considering using 2 elevated radials so as to reduce the radial field next to my new (hopefully) RX antenna (BOG). Since I don't want to raise my feed point by 5 feet and thereby decrease the vertical part of the Inverted L accordingly, I was considering using a pair of elevated radials (5 feet high -- don't know the exact height yet). I was planning on the radials sloping up 45 degrees from the base of the Inverted-L to my radial height. The radials will not be straight, but will have doglegs due to property constraints. I haven't found any literature that addresses this consideration. Comments? 73 Mark K3MSB _ Topband Reflector Archives - http://www.contesting.com/_topband
