Over the last 8 months, I was digging deep into Web Development. The result went yesterday public, DXHeat.com. Instead of building just another Web DX Cluster, I tried to build something innovative with new, unique features. The best is to check it out by yourself!
I was curious if the performance of our 4O3A high-power Bandpass filters could be improved with additional coax stubs in parallel. We were operating at ED1R for some time now with the added stubs, and we are pleased with the results. Check out the details!
At our contest station ED1R we have no space for permanent Lowband Verticals. Each Contest, the verticals have to be installed temporarily in a field nearly. Especially the deployment and removal of the antenna radials are very time-consuming. Over time we optimized our system which reduced the required time from 2 hours down to 30 minutes.
This question bugged me after trying to exchange the connectors of a 25m long Aircell7 coax cable. During preparation, I discovered a black inner conductor. It seems water entered the cable. Do I have to throw it away? Read more to discover a probably unexpected answer!
Until today, I’m fascinated by what can be achieved with good filters. At our Contest Station ED1R we bought a Triplexor (10m/15m/20m) to be able to use our new Optibeam OB11-3 on the three bands simultaneously.
A few days ago I had the time to build and try a Double Half Delta Loop (DHDL) at our Contest Station ED1R. The Antenna was built within 3 hours and can be deployed/erected within 20 minutes.
At our Contest Station ED1R, we have on each highband 3 Yagis available. In 2012 I built 4 high-power Stackmatches to switch and combine them properly. Since I never liked the way of WX0B’s stackmatch controllers with the rotative knob, a microcontroller and button-based solution were the answer. After a few contests, the solution has proven its reliability and comfort.
