N1AUP
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | N/A | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Design for 5/8 wave on 10 meters. | Oct 20th 2020, 11:02 | 2 | 189 | on 20/10/20 |
| Why won't my ARRL designed vertical tune on 20? | Aug 1st 2020, 06:47 | 7 | 403 | on 8/8/20 |
| Vertical antenna using a wire as a radiator. What gauge? | Jul 23rd 2020, 08:17 | 3 | 382 | on 24/7/20 |
| Interesting Voices Discussion Net - DMR TAC316, Wed 10/2/2019. | Sep 28th 2019, 05:02 | 2 | 1,179 | on 2/10/19 |
| DMR Discussion Net. 5/15/2019. | May 6th 2019, 06:53 | 4 | 2,027 | on 16/9/20 |
| Windom antenna. How to design the choke. | Feb 14th 2019, 15:40 | 2 | 1,512 | on 14/2/19 |
| HDSDR is not working. | Feb 15th 2018, 18:43 | 2 | 4,068 | on 26/2/18 |
| Windom for 80 - 10. Choke or not choke? | Jan 25th 2018, 15:22 | 2 | 2,083 | on 25/1/18 |
| Support for wire antennas. Wire or rope? | Jan 25th 2018, 06:19 | 3 | 2,176 | on 25/1/18 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| Design for 5/8 wave on 10 meters. | N1AUP | on 20/10/20 |
| Can someone send me plans or an article for building a 5/8 wave vertical for 10 meters (FM)? Coil specs, and the length of the vertical radiator when using insulated 14 gauge wire would be preferable. I've seen formulas to calculate same, but they want details like the velocity factor of the wire, and other things that I have no idea how to find. Thanks |
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| Why won't my ARRL designed vertical tune on 20? | N1AUP | on 8/8/20 |
Would it be useful to install a Palomar 6:1 balun on the antenna at the radiators, and feed it with 50 ohm coax to eliminate the feedline from the system? I could then play around with the length of the radiators without worrying about the feedline effecting results. https://palomar-engineers.com/antenna-products/baluns-and-ununs/1-8-30-mhz-balunsununs/hf-high-power-balunsununs/61-baluns/ |
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| Why won't my ARRL designed vertical tune on 20? | N1AUP | on 3/8/20 |
| I have a Rig Expert 600 analyzer, I'll check out the link. Thanks |
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| Why won't my ARRL designed vertical tune on 20? | N1AUP | on 2/8/20 |
| Your advice makes sense, considering that the feedline is actual radiator, but I did cut off about 20 feet, and it made no significant difference. | ||
| Why won't my ARRL designed vertical tune on 20? | N1AUP | on 1/8/20 |
| I built a vertical antenna that was described in the 13th edition of the ARRL antenna book. It's a 30 foot vertical element, and a 30 foot horizontal element, shaped like an L. 300 ohm twin lead feeds the antenna - one leg of the feedline feeds one element each. That then is connected to the balanced line inputs on an antenna tuner, that then connects to an SWR meter, and a radio. Tuner is a Dentron Supertuner with the balanced line jumper in place. I built one of these in the early 80s, and had good luck with it. I got that design out of 73 Magazine. September 1979 issue. Pages 60 - 62. https://archive.org/details/73-magazine-1979-09 The 73 antenna used 26 foot elements, while the ARRL design used 30 foot lengths. For this iteration, I used 30 feet wire lengths. 14 gauge stranded wire taped to a fiberglass mast. The feedline goes through the air about 8 feet from the ground, and travels down the side of the aluminum sided house, 1 foot from the side. It enters the house through a 4 inch PVC elbow. My antenna will tune below 3:1 on 15, and 10. 20 won't get below 3.2:1, and it's similarly questionable on 40. What did I do? The ARRL article claims the antenna will work on 40 - 10. Any input would be appreciated. Thanks |
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