I have been trying to replace my inverted L, which broke a few weeks ago, and am having all sorts of puzzlements. Please be kind - I was a history major. 1. The inverted L broke at the turn, so I we
How long is the vertical section? The insulation should have minimal effect. Wes N7WS 1. The inverted L broke at the turn, so I went looking for sturdier wire. I wound up with some #14 insulated
An EZNEC model of your antenna (height of 35') shows it to be resonant at 1865 kHz. The minimum SWR was adjusted to 2:1 by adding GND loss of 8 ohms. SWR is all you need to tune the antenna. Is minim
Where do you get the 35'? Wes N7WS SWR is all you need to tune the antenna. Is minimum SWR at 1977 kHz? I would add more wire and tune the length for minimum SWR at your frequency of interest. While
Technically the insulation should electrically lengthen the antenna about 1.5-2 % (lower the frequency) As Wes said the dimensions would be helpful. is the flat op horizontal or does it slope down if
Hi Pete, I hope those 17 turns are wound around a #31 Fair-Rite core. The radials are part of the antenna -- that's why you had to connect them to see resonance, and it's probably why resonance is hi
Thanks to everyone who has replied so far, and apologies - I did a lousy job of describing the antenna. First off - I set out to make it 1/4 wave (approximately 128 feet) long, and the starting leng
Very wrong core for HF and 6M. #31 is the only good choice. The measured minimum SWR is 2.2 at 1925 KHz, and resonance (X crossing zero) is at 1983 KHz. All measurements made at the base of the ante
On 3/25/2021 11:39 AM, N4ZR wrote: Thanks to everyone who has replied so far, and apologies - I did a lousy job of describing the antenna. First off - I set out to make it 1/4 wave (approximately 12
Jim, ignorant question - at X=0, isn't the resistive component also the impedance? 73, Pete N4ZR Check out the new Reverse Beacon Network web server at <http://beta.reversebeacon.net>. For spots, ple
Lets get a bit more elementary - are you sure that wire has DC continuity end to end when its up and tensioned ??? I once bought a roll of wire from HD that had a gap of about an inch in it Maybe you
It's the feedpoint impedance, but I suspect something flaky with your measurement, which is why I suggested a sweep and displaying R and X. 73, Jim _________________ Searchable Archives: http://www.c
Pete, I was going to suggest possible interference to your measurement by a local BC station. I have a couple of very strong stations near me, one on 1550 kHz running 50KW. They are about -3 dBm on
Exactly. Pete, #31 mix is very important. Jim knows what he's talking about! :-) 73, Mike W0BTU https://web.archive.org/web/20180815141931/http://w0btu.com/160_meters.html _________________ Searchabl
Yes, that's a very nice unit, although not even the programmer's mother could like the UI. :) 73, Jim K9YC _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflecto
Jim, our Mothers love us no matter how inelegant the interface. Yes, that's a very nice unit, although not even the programmer's mother could like the UI. :) 73, Jim K9YC _________________ Searchable
Agreed. Trying to run something this complicated with three push buttons is a nightmare. Every time I use it I have to read the manual for 30 minutes. But I'm not too pleased with the RigExpert UI
I advise ordering a roll of number 14 bare, 7 strand hard drawn copper wire. Put up a continuous length of it. It will be less likely to break. On-ground radials can be solid soft wire. Not the vert