For the Basic Mini-Whip Antenna 2016 click here
Enhanced Mini-Whip antenna (0-30 MHz)
New structureThe Mini Whip antenna (see my previous article Mini-Whip Antenna 2016 ) are already made in countless designs and implementations. However, in the practical implementation, it is not always easy to find suitable housing for (outside) assembly. These are sometimes jars, boxes, tubes and other peculiar housings, which then still have to be waterproof. What if we turn the matter? I came up with the idea of the whole to miniaturize some more, so we can use a simpler construction : as a piece of electrical PVC pipe 3/4 " (16 mm) with two sealing caps (for chair legs), where all the Mini Whip retracted can become.
And so was born the Mini-Whip Slimline. It is now much easier to clamp the entire inside or outside with standard 3/4 plastic brackets or clamps.
The concept remains the same, only the prints are adapted to fit directly into the tube. Internally it is 3/4" or 16mm. The Antenna plate is 100mm x 16mm copper (singe sided) . Capacitors are 220nF or 470nF (MKM or caramic).
Board layout main-board :
|Layout Antenna section and HF Amp|
|Example of a Build in a PVC tube|
If the BNC connector does NOT fit in the tube, then it may be better to left it out, and the cable to the power PCB can be soldered directly on the mainbord.
Do not forget, feed the cable through a hole (6mm) in the sealing cap before soldering him to the main PCB.
Board layout power unit :
|Layout Power Board|
Photo overview :
| This antenna
board fits into a 30cm piece of 3/4" PVC
The Power board needs 6 to 12V DC power with a battery or a 12V Power Wall adaptor
Wanna see a test of this antenna, look on my website HF Mini Whip Antenne.
Board-layouts download here: MiniWhip1.2.zip .
mail: on1bes Scarlet.be