WA0CBW
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | N/A | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Antenna Modeling for Beginners | Feb 8th 2013, 18:19 | 3 | 2,770 | on 14/2/13 |
| Roller Inductor Tuner | Dec 20th 2011, 19:26 | 1 | 2,713 | on 20/12/11 |
| Using Ladder Line | Jul 27th 2011, 19:43 | 3 | 4,116 | on 29/7/11 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| "wacky"? SWR readings on tuning antennae.. Help?? | KM6SQB | 2 weeks, 1 day ago |
| I have found that if you are using a metal mast it needs to be insulated from the dipole mount. I have used a 3 foot piece of fiberglas or plastic pipe. Also make sure the whip isn't inserted so far it engages the top coil of the mast. Bill |
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| adjusting SWR and hamsticks - help?? | KM6SQB | on 5/11/18 |
| In most cases the resonant frequency will have the lowest SWR. Also you must re-calibrate the SWR meter for each change in power. SWR is the ratio of forward voltage (or power) to reflected voltage (or power). If you are measuring at the transmitter end of the coax use a piece of coax that is 1/2 wave length long at the frequency you are measuring. Don't forget to account for the coax loss in your calculations. Bill |
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| Grounding station vs Vertical Antenna and tower | VE3SR | on 29/10/18 |
| Normally ground rods are spaced twice their length apart. 8-foot ground rods would be placed 16 feet apart for maximum effectiveness. The NEC also requires all external ground rods be connected to the building main electrical ground. Bill |
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| License Hard Copy? | WN5FDS | on 29/10/18 |
| You can go to the FCC web site and down load a PDF of your license that you can print. | ||
| Power loss from TX INSIDE a ROOM? | K6PAA | on 18/10/18 |
| There are web sites that can give you the approximate RF attenuation for various building materials and construction techniques. Bill |
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