HFU HF Underground
Technical Topics => Equipment => Topic started by: Oliver on October 24, 2017, 1400 UTC
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I purchased around six week ago a ALA 100LN from Wellbrook.
My main target with this antenna is the Mediumwave band.
The antenna bearing is 278° - 98°.
Since I installed the antenna I tinkered with the loop height and circumference.
1. Setup - 10' height and 26' apart = 72' circumference
Signals where way to strong (S9+40 / S9+60) with attenuation (10dBm) and I observed overmodulation on a lot of stations.
2. Setup - 10' height and 20.5' apart = 61' circumference
No significant changes to the first setup. I dropped the signals by 5 S-points at best.
The overmodulation got a little better on the local stations but i was still not happy.
3. Setup - 13.1' height and 13.1' apart = 52.4' circumference
The local stations are now down to S9+10 /+20 with out any overmodulation.
Now I am wondering if I found the optimal size / circumference for the loop.
What circumference are you guys using on the ALA 100LN?
Did anyone try a triangle setup as it is mention in the Wellbrook documentation?
Overall I am curious what treasures I will catch during this MW DX season with the new Antenna.