HY-GAIN TH3-MK3 Thunderbird Antenna - for 10, 15 and 20 meter
Manual in PDF
RENOVATING the antenna in 2013 - resonance gone so I had to...
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
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/Cable and the antenna. After this error all I now working with better SWR than earlier.
|20 meter band|
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|
|10 meter band|
First Measuring Autumn 2010 - just for the record...
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 exactly as shown.
The antenna is mounted 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 frequency up a little, but as CW enthusiast I wish to have a good VSWR in the low end of bands.