ANTENTOP- 01- 2012, # 016

EH Antenna for the 20- meter Band

So, take the wire, straighten the wire. Take distance in 32- mm apart of the lower end of the lower cylinder. Do hole in 1.5- 2- mm in the plastic tube. It is possible to do with usual soldering iron. Tin one of the end of the wire on length 10- mm. Insert the tinned end into the hole. Coil 23- turns. (1) Do loop from the wire. Tin the loop. (2) Do one more turn. Do loop from the wire. Tin the loop. (3) Do one more turn. Do loop from the wire. Tin the loop. (4) Do one more turn. Do loop from the wire. Tin the loop. Then coil the last three turns. Then do hole in the plastic tube and insert in the hole the wire. Figure 5 shows the tapped tuning inductor.

My advice: Coil first and last 3- turns with gap in 3- 4- mm between the turns. It would be useful at final tuning of the antenna. So the inductor should be look like it is shown on the Figure 6.

Figure 5 Tapped Tuning inductor

Figure 6 Tuning inductor with Gap between the Coils

Almost all parts are installed on the tube. Antenna

almost is ready! Figure 7 shows the antenna.

Figure 7 EH- Antenna

1. Copper Cylinders
2. Phase Inductor
3. Tuning Inductor
4. Tuning Part of the Inductor
5. Plastic Tube

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