Is it logic to suggest im4u FM 107.9MHz to transmit from Gunung Ulu Kali?

Until today, im4u FM 107.9MHz is transmitted from Bukit Sungai Besi for Klang Valley, launched since March 2013.

3 years ago, I was used to suggest im4u FM 107.9MHz to migrate its transmitter site to Gunung Ulu Kali in order to reach wider coverage of Klang Valley.

==RF analysis of im4u FM 107.9==

107.5MHz: Pahang FM Gn Ulu Kali
107.9MHz: IM4U FM Gn Ulu Kali
<400kHz, OK>

107.7MHz: Negeri FM Gn Ledang
107.9MHz: IM4U FM Gn Ulu Kali
<200kHz, OK>

107.9MHz: IM4U FM Gn Ulu Kali
107.9MHz: Radio Klasik Bukit Pelindung
<0kHz, OK>

107.9MHz: IM4U FM Gn Ulu Kali
107.9MHz: Minnal FM Bukit Larut
<0kHz, NOT OK>

When I rethink again back of this suggestion which made two years ago, now I don't think IM4U FM 107.9MHz is not suitable to be used in Gunung Ulu Kali as there is co-channel interference to Minnal FM 107.9MHz Bukit Larut coverage in Perak areas like Manjung, Sitiawan, Lumut, Ayer Tawar, Pangkor Island and some Teluk Intan areas. In this areas, Minnal FM main frequency is 98.9MHz from Gunung Kledang. Unfortunately, Minnal FM 98.9MHz Gn Kledang is interfered heavily by 988 FM 98.8MHz Gunung Ulu Kali in many Perak areas since 1996. In Tapah, Teluk Intan, Bidor, Sungkai, Langkap and Kampung Gajah, Minnal FM can be received alternatively on FM 96.3MHz from Gunung Ulu Kali, even FM 107.9MHz Bukit Larut still can be received, but not clear.

When comes to Manjung district areas like Sitiawan, Manjung, Ayer Tawar, Changkat Keruing and Pangkor, these areas suppose to receive radio signal from Gunung Kledang loudly and clearly. While Minnal FM 98.9MHz is still having interference with 988 FM 98.8MHz, its Bukit Larut 107.9MHz is very important alternative frequency in these affected areas. It also states that Minnal FM 96.3MHz Gunung Ulu Kali reception is unstable in Manjung district areas as 100kHz interference with Sinar FM 96.4MHz Bukit Larut. Imagine if IM4U FM 107.9MHz is transmitted from Gunung Ulu Kali, all Minnal FM frequencies in Perak 98.9, 96.3 and 107.9 will get interference much.

Unless Minnal FM changes its Ipoh frequency 98.9MHz to 99.0MHz, so there is no problem if IM4U FM 107.9MHz transmits from Ulu Kali, but RTM is unable to change the frequency as RTM is using 6+1 system where six transmitters share with a TX standby antenna. If RTM changes Minnal FM Ipoh frequency, the rest of RTM Ipoh radio station broadcasting will be heavily affected. In addition, this will involve high cost to change the transmission equipment. Besides that, I was told by RTM that the usage of FM 98.9MHz by Minnal FM in Gunung Kledang Ipoh was earlier than 988 FM 98.8MHz Gunung Ulu Kali. RTM also told me that logically 988 shall change the frequency.

I may agree with the comment, but 988 is a Chinese radio station name based on FM 98.8MHz in Klang Valley. If 988 changes frequency, the station name shall be renamed. Why 988? In Chinese language, 988 is 九八八 ("jiu ba ba" in Mandarin, "kao batt batt" in Cantonese), the name sounds bringing prosperity, it means 988 is bringing prosperity forever. (久發發, "jiu fa fa" in Mandarin, "kao fatt fatt" in Cantonese).

When Minnal FM 98.9MHz Gunung Kledang faces interference with 988 FM 98.8MHz Gunung Ulu Kali in many Perak areas, Minnal FM 107.9MHz Bukit Larut and 96.3MHz Gunung Ulu Kali becomes important alternative frequencies to cover affected areas. In conclusion, IM4U FM 107.9MHz cannot be transmitted from Gunung Ulu Kali. 988 in these affected areas can be tuned on FM 99.8MHz from Gunung Kledang Ipoh, even FM 101.0MHz Bukit Larut can be listened.

- FM 107.9MHz: Lumut, Manjung, Sitiawan, Ayer Tawar, Changkat Keruing, Pantai Remis, Pangkor
- FM 96.3MHz: Teluk Intan, Bagan Datoh, Langkap, Tapah, Bidor, Sungkai, Terolak, Temoh, and Kampung Gajah