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re: 1395 kHz excellent log of Tony Rogers-UK BRDXC-UK iogr, wb_ed.
The 8 x mast sidefire SV4+4 antenna towards TUR, CYP, SYR, LBN, ISR at 232 degr azimuth will certainly not be used for NHK Persian 130-135 degr, that will then run via an omnidirectional transmitter mast ex234 kHz rebuilt longwave mast at Gavar. Newly erected at location: ARM _ MW 1395 kHz (ex234 kHz LW rebuilt) mast non-dir at 40 24 59.93 N 45 11 51.90 E https://maps.app.goo.gl/gSrGka1KcNJ9W4Wo8 ARM _ MW directional Srednyaya Bolshaya Zarya antenna. The Zarya 26 x mast 1.8 km length antenna is designed for 1314 kHz fixed frequency, exactly 180 degrees towards Western Iran, Kuwait, or Saudi Arabia target during USSR era. (wolfie df5sx) -----Ursprüngliche Nachricht-----
From: Glenn Hauser via groups.io
Sent: Thursday, October 10, 2024 6:41 AM
To: WOR DXLD
Subject: [WOR] 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. regards ben (Ben Dawson, OR, Hatfield-Dawson Consulting Engineers)
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