W1VT
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | Super Moderator | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| QST Downloads | Feb 19th 2016, 16:34 | 5 | 9,466 | on 25/4/20 |
| March 2016 QST Compact Multiband Dipole | Feb 19th 2016, 15:23 | 1 | 5,868 | on 19/2/16 |
| Antenna analyzer vs feedline type | Sep 21st 2012, 14:37 | 1 | 7,533 | on 21/9/12 |
| USB to Serial Port problems--Prolific Drivers | Aug 3rd 2012, 18:27 | 2 | 8,463 | on 26/12/15 |
| Italian Phishing emails! | Dec 13th 2011, 14:20 | 1 | 7,134 | on 13/12/11 |
| John K0GMO needs help designing SS Amp | Nov 17th 2011, 15:53 | 1 | 7,051 | on 17/11/11 |
| 1 Farad Capacitor to Eliminate Headlight Flicker? | Oct 19th 2011, 13:14 | 4 | 9,300 | on 9/11/11 |
| History of Relay Rack Dimensions? | Oct 17th 2011, 12:58 | 2 | 6,887 | on 25/10/11 |
| Miswired Selsyn | Oct 13th 2011, 17:51 | 1 | 7,095 | on 13/10/11 |
| Stealth Antenna wire | Sep 12th 2011, 12:51 | 2 | 8,006 | on 13/9/11 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| 2 Meter Tape Measure Antenna Questions | K3OHU | 1 day, 13 hours ago |
| The effective diameter of the tape measure is much greater than a thin wire or rod. As the diameter increases the resonant frequency increases and the elements need to be shorter. http://theleggios.net/wb2hol/projects/rdf/tape_bm.htm https://www.instructables.com/The-Tape-Measure-Antenna/ This design uses a hairpin match. The driven element is cut shorter and an inductor is placed across it to effectively step up the feedpoint impedance. The gain of a Yagi is a function of boom length, not the number of elements. With just 3 elements more gain can be obtained by making the driven element farther away. Zak Lau ARRL Senior Lab Engineer |
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| Front end greatly attenuated | fredffb@gmail.com | 5 days, 14 hours ago |
| Interference from solar systems is usually something that goes away at night. Do you still have the problem at night? You may be able to turn off the inverters to do a test during the day. There are many devices that can cause RFI. It is possible for the inverters to be clean but the power supply powering a WiFi data collection system associated with the supply to cause RFI. Zak W1VT ARRL Senior Lab Engineer |
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| QRM Problem LW, MW and SW SOLVED! | KG4LAC | 1 week, 1 day ago |
| Great to hear you were able to track it down to a twenty year old Memorex DVD player. | ||
| QRP Wattmeter article | WT1V | 1 week, 3 days ago |
| http://www.arrl.org/files/file/QST%20Binaries/2022%20QST/102022/Sittner.zip I was able to log out of and then download this file. |
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| Solar Wind and ham sattelite problems | WB6TOU | 2 weeks, 5 days ago |
| My research suggests that amateur satellites typically pass below the Van Allen Belts where radiation is unusually high. The location of these belts is not clearly defined. | ||
