Currently Fly FM Kota Bharu frequency is FM 107.4MHz, it is launched since late 2007 and transmitted from Media Prima's Peringat tower where Hot FM and Buletin FM transmit there to cover Kota Bharu and surrounding towns.
I was told by my friends who are staying in Kota Bharu and other Kelantan towns about Fly FM 107.4MHz signal reception matter. In Kota Bharu, my friends there said the signal of Fly FM 107.4MHz is not clear in certain part of Kota Bharu, somewhat Fly FM 107.4MHz from Peringat tower is suffering adjacent channel interference with a Thailand radio station which broadcasts on FM 107.5MHz. This gains my attention over the matter.
I checked what is the Thailand radio station FM 107.5MHz which interferes Fly FM 107.4MHz coverage in Kota Bharu and Northern Kelantan through Facebook and Google. I realized the FM 107.5MHz is operated by an army radio station where based in Lochut, Waeng District, Narathiwat Province, Thailand.
For your information, Lochut, Thailand is located next to Ayer Lanas, Kelantan, Malaysia. The FM 107.5MHz transmission from Lochut already overspills to North Kelantan, causing interference to Fly FM in part of Kota Bharu. I believe this Thailand radio station operates at 1kW transmitter power which is standard output power among all Thailand army radio stations.
Last week, I also checked this Thailand radio station in Gua Musang, Kelantan.
Fly FM 107.4MHz reception is completely locked in Rantau Panjang, Kelantan. Interference also happens in Pasir Mas, Wakaf Bharu, Tumpat and Tanah Merah.
To reduce and prevent interference with Thailand radio station FM 107.5MHz, Media Prima Audio (MPA) can migrate Fly FM's Kota Bharu frequency a 100kHz step backward from 107.4MHz to 107.3MHz without changing antenna system parameters and transmission site, but this suggestion is also subject to MCMC decision.
Here is a quick analysis of adjacent stations if Fly FM Kota Bharu frequency is on FM 107.3MHz, rather than FM 107.4MHz in order to prevent being interfered by Thailand radio stations within broadcast areas.
Current transmitter power of Fly FM Kota Bharu frequency is 0.25kW.
107.0MHz: SV Sound Radio Sungai Golok, Thailand
107.3MHz: Fly FM Peringat (Kota Bharu)
<300kHz, OK>
107.25MHz: PSU Radio Pattani, Thailand
107.3MHz: Fly FM Peringat (Kota Bharu)
<50kHz, OK> (Note: Pattani is not involved in Malaysia-Thailand border frequency coordination)
107.2MHz: Kelantan FM Dabong (gap filler transmitter)
107.3MHz: Fly FM Peringat
<100kHz, OK>
107.3MHz: Fly FM Peringat
107.5MHz: Lochut, Thailand
<200kHz, OK> (interference reduced if Fly FM migrates from 107.4MHz to 107.3MHz)
107.3MHz: Fly FM Peringat
107.5MHz: Fly FM Bukit Besar (Kuala Terengganu)
<200kHz, OK>
107.1MHz: RTM Kelantan FM Bukit Bintang (Besut & Pasir Puteh)**
107.3MHz: Fly FM Peringat
<200kHz, OK>
**Alternative frequencies of Kelantan FM: 97.3MHz & 102.9MHz
Between Kelantan FM 107.1MHz Bukit Bintang transmitter and Fly FM 107.3MHz Peringat transmitter, I believe it is fine when Fly FM uses 107.3MHz in Kota Bharu and Fly FM 107.3MHz won't interfere Kelantan FM 107.1MHz coverage because Kelantan FM has two alternative frequencies 97.3MHz from Bukit Bakar and 102.9MHz from Wakaf Che Yeh within Bukit Bintang FM 107.1MHz transmitter's coverage.
If Kelantan FM's listeners hear adjacent channel interference from Fly FM 107.3MHz on FM 107.1MHz in Pasir Puteh and Besut, its listeners can still tune to FM 97.3MHz from Bukit Bakar clearly in affected areas, even FM 102.9MHz from Wakaf Che Yeh is still available in those affected areas.
There is also 200kHz frequency separation between Bukit Bintang (Besut) and Kelantan (including Kota Bharu) radio stations.
95.3MHz: Minnal FM Bukit Bintang (Besut)
95.5MHz: Radio Klasik Bukit Bakar (Machang + Kota Bharu)
Alternative frequencies:
* Minnal FM: 100.9MHz Bukit Bakar & 106.7MHz Wakaf Che Yeh
* Radio Klasik FM: 101.1MHz Wakaf Che Yeh & 94.3MHz Bukit Bintang
Besides that, if Fly FM changes its Kota Bharu frequency to 107.3MHz, I believe Fly FM will get more coverage in North Kelantan areas, compare to current FM 107.4MHz because the frequency separation with Thailand radio station FM 107.5MHz is getting wider.
I hope Media Prima Audio (MPA) will pay attention to this matter in order to solve the coverage problem. In addition, I hope my suggestion to migrate Fly FM Kota Bharu frequency to 107.3MHz will be considered as further action.
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