About superlong Zarya MW transmitting antennas, Armenia and Tajikistan.
In our work at both Gavar and Orzu we inquired and the local folks had essentially no technical information on the Zarya antennas. They were set up and tuned by folks (from Moscow?) for specific frequencies and that’s that. I can say that from my notes it is clear that retuning them would require moving a lot of shorted transmission line sections used for phase and amplitude control. And we have notes from a talk given to IBB personnel by a Russian engineer which state that the gain (presumably of the long version) is “40” which (if that is voltage) would be ~32 dB. I also have horizontal and vertical gain patterns for the 8 lambda and 10 lambda versions taken by a colleague from photographing a document he was shown at Orzu, but that is the extent of my actual technical data. The drawings are so small that measuring them with a polar planimeter to obtain the gain would be subject to ambiguity.
Ben Dawson, OR, Hatfield-Dawson Consulting Engineers to WOR iog (2024-10-10)