
Chennaihams wishes to thank Prince Frederick (The Hindu) for the good coverage which would give more visibility to the HAM hobby in Chennai to ensure this hobby keeps growing further in this era where other communication modes are expanding fast.


For full photoprofile of the event pls click on this link PhotoAlbum of Eyeball
The Address is as follows:
Maharastra Education Fund Hall No.290, TTK road , Alwarpet , Chennai Opp to Ethiraj Kalyanamandapam.
The eyeball meeting is a casual interaction meet for all SWL's/budding HAMS tomeet around with buddies to discuss on preparation plans to take up ASOL examsand also for all OM's to catch up old friends , have a chat etc.Its also an opportunity to share suggestions/ideas for the improvement of theblogsite as well overall HAM activities in Chennai or any other subject relatedto ham radio.Your presence for this gettogether will be the key to success of the event and astepping stone for organising further HAM activities during 2009 in Chennai.






This is already compiled info available in the internet on the HAM VHF repeaters in South India, but many are non functional at this point of time, We invite current status info on all these repeaters from HAMS across SIndia to create an uptodate one and post on this webspace for the benefit of all HAMS/SWL's across South India.
A repeater is a device that extends the range of mobile and portable radios. A repeater consists of a dedicated high-power radio unit that receives transmissions on its input frequency and simultaneously re-transmits them on its output frequency. Most repeaters have a set, band-dependant channel spacing (all repeaters on a particular band will have their input and output frequencies separated by the same amount, known as a REPEATER OFFSET).
Ham radio makes use of repeaters quite frequently, as do most commercial radio users. For very obvious reasons, scanner users need only worry about monitoring a repeater’s output or tx frequency. The most basic repeater consists of an FM receiver on one frequency and an FM transmitter on another frequency usually in the same radio band, connected together so that when the receiver picks up a signal, the transmitter is keyed and rebroadcasts whatever is heard. Ham repeaters are found mainly in the VHF two meter (144 - 146 MHz) and the UHF 70 centimeter (434 - 438 MHz) bands, but can be used on almost any frequency pair above 29 MHz.
Thus "one-five seven-five" (15/75) meant that hams would transmit on 145.75MHz and listen on 145.15MHz (while the repeater would do the opposite, listening on 145.75 and transmitting on 145.15). Since the late 1970s, the use of synthesized, microprocessor-controlled radios, and widespread adoption of standard frequency splits have changed the way repeater pairs are described. Repeaters typically have a timer to cut off retransmission of a signal that goes too long. Repeaters operated by groups with an emphasis on emergency communications often limit each transmission to 30 seconds, while others may allow three minutes or even longer. The time restarts after a short pause following each transmission, and many systems feature a beep or chirp tone to signal that this has taken place.
A Band-pass/ Band-reject Filter otherwise known as Duplexer is used along with the repeater to operate on a single antenna for both transmit and receive. The Duplexer may have a set 2 or 3 cavities on both Transmit and receive side. A high gain Omni-directional antenna will be normally used at the repeater locations.
In India compared to other state/Cities Chennai is having maximum VHF repeater Stations.
Call Sign Tx Frequency Rx Frequency Location
VU2 PUM 145.600MHz 145. 00 MHz Chennai
VU2 MRR 145.775 MHz 145.175 MHz Chennai
VU3 MVR 145.675 MHz 145.075 MHz Chennai
VU3 VGC 145.575 MHz 144.975 MHz 75 KM from Chennai
VU2 VCM 145.475 MHz 145.875 MHz 150KM from Chennai
VU2 X I S 145.375 MHz 144.775 MHz 75 Km from Chennai
Due to some technical snags few of the above repeaters are not working. In a few months time all the repeaters will be operational . The First UHF repeater station in India is also located in Chennai.
VU2 MUG 434.100MHz / 435.800 MHZ
Each repeater station location and installation was a dream and it carries so much struggle/memories of different people who made it possible . The featured articles will follow with updates about the story of each repeater . In 2009 Chennai hams are trying to do more research and new ideas on the repeater maintenance , keep visiting this site for more updates.
Also this is an interesting link with info on the latest models of HAM Transreceivers from ICOM,Kenwood,Yaesu,Motorola etc . Pls check out http://www.twowayradioonline.com/
Amateur radio, often called HAM Radio, is both a hobby and a service in which participants, called "hams," use various types of radio comunications equipment to communicate with other radio amateurs for public service , recreation and self-training. Amateur radio operators / HAMS enjoy personal (and often worldwide) wireless communications with each other and are able to support their communities with emergency and disaster communications if necessary, while increasing their personal knowledge of electronics and radio theory. An estimated six million people throughout the world are regularly involved with amateur radio and its a very addictive passion like photography, adventure sports etc.
The first step is to get an amateur radio license in India from the ministry of communications/Wireless Planning Commission(WPC) . For the same, you have to write and pass an exam, and depending upon the category of license you are applying for, you may also need to learn the morse code. Don't worry that it would be too technical, its simple stuff which you need to learn and within reach of anybody, not essentially only engineers/tech folks.
This examination is held monthly in Delhi, Mumbai, Kolkata and Chennai , every two months in Ahmedabad, Nagpur and Hyderabad, and every four months in some smaller cities, but it all depends on number of applicants . The examination consists of two 50-mark written sections: Radio theory and practice, Regulations; and a practical test consisting of a demonstration of Morse code proficiency in both sending and receiving for Grade I & II. After passing the examination, the candidate must then clear a police verification process . After clearance, the WPC grants the licence along with the user-chosen call sign. This procedure can take up to 12 months.



It was a real pleasure to meetup withg old HAM friends from vary places after quite sometime. VU2VSD S OM Sundar welcomed the gathering. OM Vittal VU2 VIT spoke about OM Chauhan VU2 MV mentioning the relationship with him, the services rendered by him for promoting ham radio in India.