Two new papers are uploaded in LZ1AQ site. Models are used to evaluate the impact of external conducting objects on the radiation pattern of directive RX antennas. They might help the users to understand sometimes unexpected behavior of their RX … Continued
Important for VDL-1 users. We found out that VDL-1 might have a problem when model AAA-1C active antenna amplifiers are used with it. These models are using optocouplers in the relay control lines in order improve the isolation from strong … Continued
An important stage in VDL-1 array mounting are the ground connections and feeder baluns in order to achieve proper performance. The file is in http://active-antenna.eu/tech-docs/vdl-ground.pdf
New possibilities with AAA-1. The AAA-1 modes can be controlled now from a PC. It is convenient to have such an option e.g. if you have a remote station there must be way to switch the antenna modes via software. … Continued
There is a strong and fast fading on HF bands. When testing my phased array with small active antennas, the measured front-to-back (F/B) ratio is usually between 20 to 40 dB with local stable signal sources with vertical polarization. The … Continued
A new version of the software v.1.61 for VDL-1 control from PC is uploaded on this site. The installation is simplified and new “periodic switching” mode is added. The periodic switching can be used to test and estimate the antenna … Continued
Model AAA-1C is now available from a new batch. There are no changes compared to previous batch. No price changes.
I must inform you that all AAA-1C kits from the current batch were sold out. The next batch AAA-1C will be available for shipping from the last week of September 2016. I am waiting to get them from the mounting … Continued
The new batch of the Active Antenna Amplifiers is going through the final tests. There are no differences compared to the previous batch and the model is AAA-1C. The ordered kits will be dispatched after 9 -th of November 2015. … Continued
I published a new article “Receiving with wideband small active loops in NDB band (250 to 500 KHz)” where some problems are discussed when using wideband active loops with common base amplifier and crossed coplanar loops. Look at http://www.lz1aq.signacor.com/. Users … Continued
