Arabic Service website & on-air observations.
There’s a website dedicated to VIRI/IRIB Arabic Service at https://arabicradio.net (registered in Canada) featuring a SW/MW/FM and satellite frequency schedule which appears to be accurate as far as I can tell, albeit greatly at variance with other published sources. It shows the service on 576 & 1224kHz round the clock and on four SW frequencies in various time blocks in the 0600-1730UT period, usually one tx at a time (just two txs overlapping at 0930-1030UT). All but one of the five SW transmission blocks are aimed at Yemen. My monitoring observations via webSDRs in the Gulf confirm all four SW frequencies are
indeed on air within the time periods stated, though often with extremely low modulation on a strong carrier.
David Kernick, Interval Signals Online to WOR iog (2023-11-25)
In case anyone else wants also to take a look at the frequencies:
https://arabicradio.net/frequencies
576 kHz around the clock would mean that the Mahshahr transmitter now always uses the daytime frequency and has abandoned its former nighttime frequency 1080 kHz. Would be no surprise at all, one of the two mediumwave antenna systems of the station is gone, like the shortwave antennas (with the exception of a single tower). Can’t confirm neither frequency with the TWR Cyprus SDR right now, only 1224 kHz. On 576 kHz nothing else than Bulgaria and on 1080 kHz some other signal as well.
For the shortwave side the question remains if the night / early morning frequencies 7220 and 9725 kHz are not in use. Otherwise this schedule confirms the observations that there is neither a separate Voice of Palestine shortwave transmission nor are the Zahedan transmitters in use anymore.
That very low audio – a couple of years ago the editorial offices complained and some repairs had been made. But those who complained have since been stripped of their shortwave airtime and no one seems to care anymore. I would not be surprised if the remaining three transmitter operation at Sirjan (or perhaps now even further down to two ones? – hard to tell because a number of the HFCC registrations have China co-channel) will cease rather sooner than later.
Kai Ludwig to WOR iog (2023-11-25)