W1VT
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | N/A | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Antenna analyzer vs feedline type | Sep 21st 2012, 14:37 | 1 | 856 | on 21/9/12 |
| USB to Serial Port problems--Prolific Drivers | Aug 3rd 2012, 18:27 | 1 | 1,031 | on 3/8/12 |
| Italian Phishing emails! | Dec 13th 2011, 14:20 | 1 | 1,046 | on 13/12/11 |
| John K0GMO needs help designing SS Amp | Nov 17th 2011, 15:53 | 1 | 927 | on 17/11/11 |
| 1 Farad Capacitor to Eliminate Headlight Flicker? | Oct 19th 2011, 13:14 | 4 | 1,646 | on 9/11/11 |
| History of Relay Rack Dimensions? | Oct 17th 2011, 12:58 | 2 | 1,152 | on 25/10/11 |
| Miswired Selsyn | Oct 13th 2011, 17:51 | 1 | 959 | on 13/10/11 |
| Stealth Antenna wire | Sep 12th 2011, 12:51 | 2 | 1,465 | on 13/9/11 |
| Designing a ham bench | Aug 29th 2011, 12:38 | 2 | 1,545 | on 29/8/11 |
| Can't find recent Hint and Kink | Aug 26th 2011, 13:01 | 1 | 1,382 | on 26/8/11 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| Calculating Impedance | W6OGC | 10 hours, 32 minutes ago |
| Another important factor is the thickness of the wire. But, to properly account for this, you typically need brute force computing techiques--formulas become to hard to come by, even for highly skilled mathematicians and PHD level radio engineers who write those thick textbooks. Zack Lau W1VT ARRL Senior Lab Engineer |
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| Software suggestions for controlling a Yaesu FT-920 | N1EDM | 1 day, 6 hours ago |
| I did a web search and found this free control program http://www.g4hfq.co.uk/ You need to make sure that the the driver for your USB/serial converter is compatible with the operating system of your computer. Alternately, one can install a serial card in a desktop computer to avoid the need for converters. Though this does not eliminate the need for finding drivers compatible with your current operating system. Zack Lau W1VT ARRL Senior Lab Engineer |
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| Ground Foil | KF5ZBH | 1 day, 6 hours ago |
| Here is the ARRL Web page on Grounding. http://www.arrl.org/grounding In particular, Tom, W8JI has excellent pictures that show your options in bonding your station ground to the service entrance--this connection is perhaps the most important aspect of protecting your station against lightning--lightning will find a path to ground one way or another--it is your job to insure that it finds a safe path that does not endanger your home or family--which you can do by following NEC code requirements. Tom Rauch W8JI has excellent pages on station grounding. http://www.w8ji.com/station_ground.htm At my station, I put lightning protection ahead of RF performance--the station ground is line of sight to the service entrance, even though this means a much longer cable between the rig and flagpole antenna. While I initially had some issues with RF on the coax shield, as 20M radials and a few ground rods a long distance away were barely adequate on 10M, I made the problem go away by adding more radials to effectively ground the antenna on all bands. Zack Lau W1VT ARRL Senior Lab Engineer |
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| New Digital Mode? | AC2IK | 6 days, 17 hours ago |
| JT9 is a very narrow digital mode WSJT-X implements JT9, a new mode designed especially for the LF, MF, and HF bands http://www.physics.princeton.edu/pulsar/K1JT/wsjtx.html Zack W1VT ARRL Senior Lab Engineer |
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| Joel Hallas HF Ground Plane article in 12/2013 QST | WO1X | 1 week ago |
| The amateur tradition is to do the best you can, and try it out on the air to see if it works for you. Many hams have been pleasantly surprised how well an antenna works, even if significant compromises needed to be made. For instance, my top loaded 160M inverted L started out as a hastily installed inverted L hung between two trees--so I could work CY0P before the DX-pedition operators left Sable Island! I then converted it to a T with unequal T wires. Last Sunday I finally got around to balancing the T wires by splicing in more wire. Grounding?--I just ran a wire over to my 80 M vertical which as elevated 55 ft radials. Works surprisingly well--not only did I work CY0P, but I've worked a bunch of Europeans and 39 states in the last two months! Zack W1VT ARRL Senior Lab Engineer |
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