"You" wrote in message
...
In article ,
"Yuri Blanarovich" wrote:

It is most likely the huge dish in Arecibo, Puerto Rico.

Arecibo ISN"T an "HF" antenna.........

Just for the heck of it , I did a little internet check on Arecibo and found
the following info;
""Full operation of the facility ideally requires three frequency bands,
near 3.175, 5.1, and 8.175 mhz."

Harold
KD5SAK