Biography

After accompanying my wife and daughter studying in Adelaide, South Australia on January 2014, I returned to my hobby, which is in the field of communication radio. What strengthens my interest is the fact that our family home is located within the prone areas of the eruption danger of Merapi volcano.



A distance of 20 km from the summit of Merapi volcano requires me to set up a communication radio station as a preventative measure to the danger of hot cloud bursts of ash or what has an even higher risk, windstorms, also known as 'wedhus gembel' in our mother tongue.

Therefore I took a national recruitment test to be a member of Organisasi Radio Amatir Republik Indonesia (Amateur Radio Organization of Republic of Indonesia) or in short ORARI. The concern of my family and I is to provide communication means that is free from dependance to GSM and CDMA communication mediums, which currently become the main platforms for telephone network in Indonesia.

GSM telephone network relies on its base stations (BTS), which are operated by electricity as the power source. In case of emergencies, electricity usually goes down and UPS will back up the operation of the base stations.However, this method has its own limitation.Learning from the previous experience during the Yogyakarta earthquake 2006, UPS was not be able to support the power needs in base stations longer than a day. A generator can be an option, but the operational and maintenance costs are still an issue currently.



During the emergency period in the aftermath of Yogyakarta earthquake 2006, ORARI played significant roles in delivering disaster-related information. Their hand-transceivers remained operational when the GSM and CDMA network stopped working as the electricity went down due to the earthquake. The experience showed me that communication radio system is reliable as the contingency communication method.

Communication radio system is supported both by electricity and batteries as the power source. Batteries will allow hand-transceivers (HT) to operate for almost a week. Within a certain range, HTs do not require repeaters to establish direct communications. If repeaters are needed, batteries will still be able to support the functionality of the repeaters when electricity goes down; and batteries can support them for several days of operation.

Being a member of ORARI also allows me to be part of the broader network of ORARI communication radio, supported by sufficient infrastructure, such as repeaters, which have national coverage of communication radio network. Being connected in this network gives me opportunities to communicate and inform immediately through the network when emergency situations happen.

I am very confident that communication radio system can be a reliable communication system to alternate the GSM/CDMA system for disaster preparedness in communication. This will be also beneficial for the safety not only of my family in case of emergencies, but also the wider community as what ORARI contributed during the Yogyakarta earthquake 2006.

de YD2YEN Erry Noegroho
Purwomartani Baru Blok II - 39 , Kalasan, Sleman
Special Region of Yogyakarta, ID 55571
Indonesia

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Worked DXCCs:

Equipment

HF Icom IC-718 DSP
VHF/UHF Alinco DR632 IC TA70
VHF TRIO 9000, Kenwood 9130, Yaesu 2900, Icom IC-2300H
VHF Antenna Super Boomer 17B2 homebrew, Diamond F23
VHF Tuner Daiwa CNW-919
Power Supply BELL 40 A, Kenpro KR-400 Rotor

Antennas:
My Low Profile Rotatable Dipole X7-1 7 Band 40-20-15-11-10-6-2m band with Amidon Toroidal for baluns, * *
DIY Kits Elm for X7-5 gain upgrade (soons), Diamond F23H
My Tower Supporter height is 20 meter above ground, with 5/8 medium pipe and philips style.