558.0792 kHz: IRIB Radio Iran's extensive synchronuous network is no longer... - Random

arnie_dxer, 3 months ago Polish

558.0792 kHz: IRIB Radio Iran's extensive synchronuous network is no longer really that synchronuous, as one of the 22 transmitters listed for this frequency has slipped almost 80 Hz off 😝

Obviously, with such a large network, it's hardly even possible to tell which of the 22 units is the culprit... #mediumwave #mwdx #OddballCarrierOfTheDay

List of IRIB Radio Iran transmitters operating on 558 kHz mediumwave, taken from mwlist.org. The listings include transmitter locations, QTH locators, distances & bearings from my QTH in NE Poland, as well as notes for each transmitter as almost all have been moved here from all across the MW dial 6 years ago. 14 of the 22 transmitters are run at 100kW or more, including 2x 600kW, 1x 500kW and 2x 400kW units.
Map of IRIB Radio Iran transmitters operating on 558 kHz, courtesy fmscan.org. 10 of them are stretched across the northern portions of the country, with further 10 grouped in a cluster covering C & SW Iran, and one transmitter each in the East (Birjand) and South-East (Iranshahr).

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arnie_dxer, 3 months ago

EDIT: during about 10 minutes it took me to polish, ALT-text, and publish the above note, that IRIB Radio Iran transmitter has managed to re-adjust to 558.0 kHz!

There are 2 more strong offset carriers just below the frequency, but they don't look like carrying Radio Iran. And whatever's underneath is covered up pretty well by the giant Iranian network. #mediumwave #mwdx

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