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Topic Created Posts Views Last Activity
Antenna Modeling for Beginners Feb 8th 2013, 18:19 3 2,987 on 14/2/13
Roller Inductor Tuner Dec 20th 2011, 19:26 1 2,930 on 20/12/11
Using Ladder Line Jul 27th 2011, 19:43 3 4,391 on 29/7/11

Latest Posts

Topic Author Posted On
Filtering ac driveinman on 20/12/18
How do you know it is coming in on the AC line and not the antenna?
"wacky"? SWR readings on tuning antennae.. Help?? KM6SQB on 3/12/18
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.
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.
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.
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.

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