Radio Diva Nusantara in Rokan Hilir, Riau Province, Indonesia changed the frequency from FM 100.3MHz to FM 101.7MHz since 9th February 2022. Won't it get interference from Malaysia radio station MY FM 101.8MHz (Gunung Ulu Kali) within Rokan Hilir?

 

The only Indonesia local radio station in Rokan Hilir, Riau Province, Radio Diva Nusantara had recently changed its frequency from FM 100.3MHz to FM 101.7MHz on 9th February 2022.

 

Radio Diva Nusantara is based in Bagansiapiapi, Rokan Hilir regency where is adjacent to Malaysia border with Malacca Straits.

 

In Rokan Hilir, Malaysia radio stations can be received clearly from Gunung Ulu Kali. 

 

I believe the frequency change by Radio Diva Nusantara from FM 100.3MHz to FM 101.7MHz is likely to avoid interference to Radio KLA FM 100.5MHz Dumai coverage.

 

However, when Radio Diva Nusantara uses FM 101.7MHz, I wonder the radio station would be interfered by MY FM 101.8MHz from Malaysia (Gunung Ulu Kali) or not within Rokan Hilir as MY FM 101.8MHz is still clear there.

Using the frequency FM 101.7MHz by Radio Diva Nusantara in Rokan Hilir, Riau, Indonesia will not interfere MY FM 101.8MHz Gunung Ulu Kali coverage within Malaysia due to low transmission tower height by the local radio station, but interference from MY FM 101.8MHz when receiving Radio Diva Nusantara FM 101.7MHz within Rokan Hilir is my concern. 

 

MY FM 101.8MHz is transmitted from Gunung Ulu Kali at 2kW transmitter power with OMNI-directional antenna.

To prevent from being interfered by MY FM 101.8MHz in Rokan Hilir, I highly suggest Radio Diva Nusantara to change to a better frequency again.

 

My suggested new frequency for Radio Diva Nusantara is FM 107.5MHz (formerly it was my preliminary proposed frequency for RRI Pekanbaru PRO-1 Rokan Hilir repeater).

 

Why FM 107.5MHz? 

 

This is because FM 107.5MHz is vacated in Rokan Hilir. Despite the frequency is used by RTM Pahang FM 107.5MHz in Malaysia (Gunung Ulu Kali), but interference between Radio Diva Nusantara FM 107.5MHz and Pahang FM 107.5MHz doesn't exist in Indonesia because Pahang FM 107.5MHz covers only West Pahang, excluding Selangor and Kuala Lumpur. 

 

In the mean time, I should consider the existing radio stations nearby FM 107.5MHz within Riau province, Indonesia where are adjacent with Rokan Hilir. None of radio stations use the frequencies surrounding FM 107.5MHz.

 

Under my proposal of frequency change for Radio Diva Nusantara, here is the result of RF analysis.

 

107.2MHz: Radio Star FM Dumai

107.5MHz: Radio Diva Nusantara Rokan Hilir

<300kHz, OK>

 

107.5MHz: Pahang FM Gunung Ulu Kali (Malaysia)

107.5MHz: Radio Diva Nusantara Rokan Hilir

<0kHz, OK> 

 

107.5MHz: Radio Diva Nusantara Rokan Hilir

107.7MHz: Radio Komunitas Citra Pendawa FM Labuhan Batu Selatan (community radio station)

<200kHz, OK>

 

It is sufficient to operate at 1kW transmission power for Radio Diva Nusantara FM 107.5MHz for Rokan Hilir regency (mainly Bagansiapiapi and surrounding towns).

 

For RRI Pekanbaru PRO-1 Rokan Hilir repeater frequency proposal, I was used to propose FM 107.5MHz, but as today, none of RRI radio stations are operating the frequencies beyond FM 107.2MHz yet. 

FM 107.2MHz is the last frequency operated by Radio Republik Indonesia (RRI) in Karimun Island (relaying RRI Batam PRO-1). 

 

Between RRI Pekanbaru PRO-1 Rokan Hilir repeater and Radio Diva Nusantara, I believe Radio Diva Nusantara uses the frequency FM 107.5MHz is more suitable than RRI Pekanbaru PRO-1 Rokan Hilir repeater.

 

I also send an email to Radio Diva Nusantara regarding the recent frequency change as I'm curious of the interference from Malaysia radio station, together suggesting the frequency change again.

 

I do hope Radio Diva Nusantara will notice the interference when it uses 101.7MHz, and I do hope it will migrate to a better frequency in order to prevent from being interfered within its service area.