- A stealth solution for apartments ?
- I made a wireloop on the inside of the wooden windowframe in my shack with a circumference of 6,20 meters. The tuning capacitor is made of 20 cm PVC coated copperwire. Feeding is done by a medium size Ferroxcube 4C65 toroid with 1 full turn at the antenna and 2 turns at the coax. For 100 Wats power use only a full size 4C65 or a FT140-61 and replace the tuning section by a pice of RG-213 that forms a high voltage capacitor. For 40 m use a pice of aprox 75 cm RG-213. You can even use a double switch to change bands.By means of 4 hand suckers this antenna can be placed on any medium size window.
When build as mini deltaloop whith the help of two 2m. fibreglass poles it becomes a nice small field antenna .
Give it a try !
You can find toroids and hamstuff at Haje Electronics
|SEVERAL TOROIDS WERE TESTED , THE 4C65 PERFORMS FB|
|LOOP DATA ALTHOUGH THE BANDWIDTH ( Q-FACTOR ) DOES NOT MATCH|
|15MM COPPER TUBING LOOP|
Magnetic loopantenna calculator by KI6GD : http://www.standpipe.com/w2bri/software/loopcalc.exe
The prog. doesn't have an icon, just klick in the white square above it's name .
DO YOU LIKE TO EXPERIMENT WITH ANTENNAS ?
Here's all you ever wanted to know about VSWR :
SOME OF MY OTHER PROJECTS.
|MINI 40 - 20m SSB-CW QRP TRX ( UNDER CONSTRUCTION )|
|TAURUS 20M SSB TRX WITH PA 8WATTS|
|PIXIE 20M. CW QRP LINE WITH TUNER TOY TRX BUT FUN TO BUILD|