HI-GAIN TH3-MK3 Thunderbird Antenna - for 10, 15 and 20 meter
Trimming the antenna to the best...
My new VNWA from SDR-Kit.
New measuring and optimizing the antenna for best performing:
Summer 2011 - Optimizing the antenna
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Now
the resonance is about what I want, when running CW.
My EXPERT 1k-fa is able to use all the 20 and 15 meter, and on 10 meter I cane use from 28 - 29.250 MHz without any problems I found a fundamental error in connection the BALUN/Cabel and the antenna. After this error all i now working with better SWR than earlyer. |
| 20 meter band | |
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After
re-calibrating the VNWA with more horizontal points, it is possible to get
a more accurate measuring.
Between MARKER 1 and 2 the EXPERT works very perfect. Best resonance at 14.123 MHz |
| 15 meter band | |
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| 10 meter band | |
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First Measuring Autumn 2010 - just for the rocord...
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This
picture shows RETURNLOSS and VSWR for TR3 on all 3 bands on my new VNWA. The cable is Calibrated out, so the measuring-point is on the antenna-connection. The DATA of the antenna is used precisely, and exatly as shown. The antenna is mountet 11,55 meter over ground. The PA, EXPERT 1K-FA have BUILD-IN tuner, and the antenna is usable at following frequencies:
The 10 M-band could bee expanded a little by mowing the frequens up a little, but as CW-entushast I wish to have a good VSWR in the low end of bands. |
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OLD measuring:
| 20 M - Uafstemt TH3 |
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15 M - Uafstemt TH3 |
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10 M - Uafstemt TH3 |
AFSTEMT med YEASU FC-301 Antenne-Tuner 20 M - Afstemt TH3 |
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17 M - Afstemt TH3 |
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15 M - Afstemt TH3 |
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12 M - Afstemt TH3 |
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10 M - Afstemt TH3 |
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