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ANTENNAS FOR 100 POUND DXPEDITIONS

Figure 71 Measuring Traveler coils with Photoshop The measurements and final inductances after experimental modeling appear below. As you can see, these values were about as close as those measured directly on the Force-12 Sigma5. And, all this was from just a picture! Measured in antenna

Guess

Determined by modeling

Name

Diameter

Number of turns

Length

XL

Total XL

Actual XL

10m

0.85

2

0.2

0.12

0.12

0.28

12m

0.65

3

0.3

0.16

0.28

0.58

15m

0.75

4

0.3

0.35

0.64

1.10

17m

0.75

5

0.52

0.41

1.05

1.75

20m

0.7

8

0.83

0.68

1.73

3.25 + 1 pF

Table 2 TW Antenna Traveler coil values

63

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Antennas for 100 Pound DXpeditions - volume 1  

Computer-based antenna modeling and direct experience with lightweight portable antenna systems. Volume 1: Selected high band antennas [20-6...

Antennas for 100 Pound DXpeditions - volume 1  

Computer-based antenna modeling and direct experience with lightweight portable antenna systems. Volume 1: Selected high band antennas [20-6...

Profile for ne1rd
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