W1VT
| Joined: | Sat, Apr 4th 1998, 00:00 | Total Topics: | 0 | Roles: | N/A |
| Last Login: | Never | Total Posts: | 0 | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Antenna analyzer vs feedline type | Sep 21st 2012, 14:37 | 1 | 639 | on 21/9/12 |
| USB to Serial Port problems--Prolific Drivers | Aug 3rd 2012, 18:27 | 1 | 737 | on 3/8/12 |
| Italian Phishing emails! | Dec 13th 2011, 14:20 | 1 | 901 | on 13/12/11 |
| John K0GMO needs help designing SS Amp | Nov 17th 2011, 15:53 | 1 | 798 | on 17/11/11 |
| 1 Farad Capacitor to Eliminate Headlight Flicker? | Oct 19th 2011, 13:14 | 4 | 1,360 | on 9/11/11 |
| History of Relay Rack Dimensions? | Oct 17th 2011, 12:58 | 2 | 1,001 | on 25/10/11 |
| Miswired Selsyn | Oct 13th 2011, 17:51 | 1 | 837 | on 13/10/11 |
| Stealth Antenna wire | Sep 12th 2011, 12:51 | 2 | 1,274 | on 13/9/11 |
| Designing a ham bench | Aug 29th 2011, 12:38 | 2 | 1,331 | on 29/8/11 |
| Can't find recent Hint and Kink | Aug 26th 2011, 13:01 | 1 | 1,177 | on 26/8/11 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| QRP Transceiver kits/homebrews | KV4OG | 16 hours, 24 minutes ago |
| Here is a list of inexpensive QRP kits. The first one may be a little too limiting with crystal control, but is much cheaper than the other options. The last too might be a little expensive for some hams, but it certainly helps to have a little more power and a VFO. 20 meters is likely to be the best band--unless you have trees for supporting a 40 meter wire antenna. Many hams in your situation can install American Flags, as the Freedom to Display the American Flag act of 2005 prohibits developments from overly restricting your rights. Many hams have installed an American Flag and loaded up the aluminum support pole as an effective antenna. If the height is close to 16 feet, you may not even need a tuner (quarter wave vertical). Fine tuning a 15 or 16 ft flagpole for 20M can be accomplished by adding in coil made out of #14 house wire between the pole and the center conductor of the coax. Radials are needed for an effective system--they can be buried to keep them out of sight. http://www.smallwonderlabs.com/Rockmite.htm http://www.eham.net/reviews/detail/2547 Reviews http://www.arrl.org/shop/MFJ-20-meter-CW-Cub-Transceiver-Kit http://www.eham.net/reviews/detail/523 Reviews http://www.tentec.com/products/20-Meter-QRP-Transceiver-Kit-%252d-Model-1320.html http://www.ohr.com/ohr100a.htm Zack Lau W1VT ARRL Senior Lab Engineer |
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| 2 meter antenna location | KF5TQK | 1 day, 22 hours ago |
| It depends on the roofing materials and the radio path. Aluminum foil backed insulation can block or reflect your radio signal. But, at 2M, many roofing materials are reasonably transparent--you can expect to get a signal through asphalt shingle roof with only a small amount of signal degradation. The path also matters--with a good line of sight path you can afford to lose a good deal of signal and still get through. An way to find out may be to operate from your attic with an HT, and compare it with operating outside. If it works better outside, you may find it advantageous to move the antenna away from the house. Zack Lau W1VT ARRL Senior Lab Engineer |
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| amp on a ht | Barre1951 | 6 days, 22 hours ago |
| A mobile usually works better because it has a far better receiver. Your HT won't handle strong signals off channel--it is designed for low current consumption so you can run the rig all day off batteries. Loud signals will overload the receiver--strong signals will mix together producing intermod--fake signals that clutter the band. Might not be a problem if you live out in the sticks where there are few loud radio signals of any kind, but for most us, strong signal receiver performance is an important issue. And, if the receiver covers frequencies outside the ham band, mixing of signals outside the ham band becomes an issue as well. Zack Lau W1VT ARRL Senior Lab Engineer |
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| Setup | K3FMK | 1 week, 2 days ago |
| The ARRL does not offer email as a membership service--email is only available to HQ staff who need it to handle membership correspondence. http://www.arrl.org/member-support Member FAQ may be useful for answering questions about membership benefits Zack Lau W1VT ARRL Senior Lab Engineer |
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| Homebrew multiband amplifier | KC9HTC | 1 week, 2 days ago |
| http://www.arrl.org/hf-tube-amplifiers A Legal-Limit Amplifier for 160 through 10 Meters (8877) http://www.arrl.org/files/file/protected/Group/Members/Technology/tis/info/pdf/90hb3050.pdf ARRL Handbook 1990, pp. 30-50 to 30-57 Zack Lau W1VT ARRK Senior Lab Engineer |
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