Moonbounce on 21 MHz from the worlds largest antenna array for the band!

The 21 MHz antenna array of ES5RY in Estonia is reputed to be the largest in the world for that band.

The array is made up of eight 5-element Yagi's for 15m mounted on a 70-metre tower. It has a gain of 16dBd in free space with a beamwidth of less than 30 degrees.

It has a phasing system which allows the selection of five different take-off angles.... 4, 7, 10, 15 and 30 degrees.

Here is a video of ES5RY hearing a signal coming back from the moon on 21 MHz!



This next video shows the construction of the array...

Antarctica worked on 15 metres

During the last week, I worked RI1ANC on 21 MHz cw. He was located at the Russian Vostok base in Antarctica and the signal was quite weak...the type that is ok on cw but probably too weak for ssb.

With a Solar Flux of 75, the conditions on the higher HF bands are pretty poor at the moment with 28 MHz being closed most of the time. While East-West paths are a problem, the best paths are often North-South.

Often the higher bands can throw up suprises like this. Because the multi-hop path is just about open, the footprint can be quite small. It can allow you to work the DX without the pile-ups that you might find on the lower bands.