We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: ALA 100LN perfect size & shape  (Read 790 times)

Offline Oliver

  • DX Legend
  • ******
  • Posts: 1307
  • Germany,NRW
    • View Profile
    • Email
ALA 100LN perfect size & shape
« on: October 24, 2017, 1400 UTC »
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.
RX: Elad FDM-S2, Grundig Satellite 700 & Yaesu FRG-7
Ant.: HDLA 3 (Active Loop), EWE @ 270, ALA 100LN, MiniWhip
QTH: JO31 (Germany)

Please send eqsl to: oliverinusa[at]yahoo.de