At a time when all his peers are busy preparing for exams, this 19-year-old radio-obsessed geek is engrossed in tinkering with radios walkie-talkies, mobile radio transceivers, base transceivers.
Meet this 19-year-old student — Koduru Nagasainath, one of the youngest radio hams in Telangana. Call it sheer obsession or passion, this teenager engages himself, all the time, in assembling and repairing various radio handsets and making them functional again.
Right from setting up of a radio-transmitter, Nagasainath homebrewed almost all devices like TNC and antennas at his home, all by himself.
For example, this one — TNC (Terminal Node Controller) device which acts as an interface between a radio and a computer, helps in utilising the digital modes and software such as ‘ECHO links’. The device also helps in transmitting images and emails from remote and distant places during disasters. While the device is priced around Rs 20,000 in the market, Nagasainath built it all by himself by spending Rs 150.
Another radio device that he homebrewed in his small workshop-like room is a HF amplifier, which had cost him Rs 1,100. He later transformed the 10-watt amplifier to 200 watt, which can now receive and identify distant radio signals across continents through various bands.
For Nagasainath, the hobby sprouted when he first began to tinker with remote-controlled toy cars during his school days. “After learning soldering work, I had started giving electrical connections to fix devices. Later, I experimented on the toy cars. After changing their frequency, the cars began responding to their respective remote control devices,” he said. “Later, I began restoring several electronic devices.”
At the age of nine, Sai started researching on amateur radio by experimenting on a walkie-talkie handset. Since then, his penchant for becoming radio ham got bigger. “After purchasing non-amateur walkie talkies radios in the market, I have altered their frequencies a few notches to match the standards of amateur radio,” he says.
After clearing the exam conducted by Wireless Planning & Coordination (WPC) wing of the Department of Telecommunication, Nagasainath made his first wireless call to radio ham (VU3JCR) from LB Nagar in Hyderabad through Very High Frequency (VHF). He made his first long-distance call to a European station through High Frequency (HF) communication.
After procuring a licence, now Nagasainath is frequently in contact wtih ham operators across the globe from his location (QTH in ham jargon) in Kukatpally, and with his radio call sign VU3JVW.
“Now, I spend all my free time in disseminating and receiving radio messages,” he added.
This prodigy, who has completed his intermediate, is aspiring a promising career in radio manufacturing company.