Salam sejahtera kepada semua rakan yang telah membuka laman web ini. Mungkin juga anda berminat dan ingin turut serta bersama kami dilaman ini bagi mengetahui dan berkenalan dengan rakan sphamradio atau rakan radio amatur berlesen khasnya yang terdapat di Sg petani ini dan juga di Malaysia amnya. Semua rakan yang berminat boleh menyertai dan menjadi ahli laman ini dengan mendaftarkan nama ID anda mengikut keperluan atau kebiasaan 'callsign' yang digunakan oleh rakan radio amatur. Kepada yang telah mempunyai lesen anda diminta mendaftar dengan ID calsign yang telah diluluskan oleh SKMM. Manakala rakan baru yang belum ber 'callsign' bolehlah membina ID sendiri dengan perkataan yang bermula dengan 'SWL' dan diikuti nama anda atau ringkasan 3 angka nama anda. Contoh SWL_ABC atau SWL_karim. Lain lain nama samaran adalah tidak digalakkan. Pihak Admin berhak meminda ID anda atau memadamkan ID anda sekiranya terdapat sebarang keraguan ke atas ID tersebut. Anda juga diminta memperkenalkan diri anda di ruangan 'Salam Contact Perdana' bagi memaklumkan kehadiran anda setelah ID anda diluluskan. Tidak dilupakan juga, pada mereka yang bermurah hati dan ingin menyumbangkan sumbangan bagi menyelenggara repeater 9m4lgj, anda juga boleh menyalurkan sumbangan anda ke akaun CIMB 0213-0000-2111-05 di atas nama Kelab Komunikasi Radio Amatur Kuala Muda (Sphamradio) dan maklumkan sumbangan tersebut ke sms 019-5515958 Admin. Terima kasih.

Samuel F. B. Morse (1791-1872) was a painter and founder of the National Academy of Design. In 1832, while on a ship returning from Europe, he conceived the basic idea of an electromagnetic telegraph. Experiments with various kinds of electrical instruments and codes resulted in a demonstration of a working telegraph set in 1836, and introduction of the circuit relay. This made transmission possible for any distance. With his creation of the American Morse code, the historic message, "What hath God wrought?" was sucessfully sent from Washington to Baltimore. The Morse code used in those days differed greatly from that which is used today. Morse code originated on telegraph lines and the original users did not listen to tones but instead to the clicking sounds created by sounders. They used the American Morse code as opposed to today's International Morse. When sending dahs (Morse code is composed of dits or short key closures, and dahs or longer key closures) the user simply sent two close-together dits. This was created by using a conventional code key. With the advent of radio communications the international Morse became more widespread. Users of the international Morse created dahs with a longer key closure, instead of two close-spaced dits. In order to increase transmission speed on early landline circuits and later on radio circuits, semi-automatic "bug" keys were invented in 1902 and were widely adopted. Bug keys used a vibrating pendulum to create dits and the user still manually creates the dahs. In more recent times, the user can employ keyers that electronically create dits and dahs. Iambic keyers have a memory so that the user can operate a mechanical "paddle" quicker than the keying rate of the keyer. This makes for very comfortable and nearly effortless keying. Today experienced operators copy received text without the need to write as they receive, and when transmitting, can easily converse at 20 to 30 words per minute. Morse code will always remain a viable means of providing highly reliable communications during difficult communications conditions.

In all countries, amateur radio operators are required to pass a licensing exam displaying knowledge and understanding of key concepts. In response, hams are granted operating privileges in larger segments of the radio frequency spectrum using a wide variety of communication techniques with higher power levels permitted. This practice is in contrast to unlicensed personal radio services such as CB radio, Multi-Use Radio Service, or Family Radio Service / PMR446 that require type-approved equipment restricted in frequency range and power. A handheld VHF/UHF transceiver, 2007.In many countries, amateur licensing is a routine civil administrative matter. Amateurs are required to pass an examination to demonstrate technical knowledge, operating competence and awareness of legal and regulatory requirements in order to avoid interference with other amateurs and other radio services. There are often a series of exams available, each progressively more challenging and granting more privileges in terms of frequency availability, power output, permitted experimentation, and in some countries, distinctive callsigns. Some countries such as Great Britain and Australia have begun requiring a practical training course in addition to the written exams in order to obtain a beginner's license, called a Foundation License. Amateur radio licensing in the United States serves as an example of the way some countries award different levels of amateur radio licenses based on technical knowledge. Three sequential levels of licensing exams (Technician Class, General Class and Amateur Extra Class) are currently offered, which allow operators who pass them access to larger portions of the Amateur Radio spectrum and more desirable callsigns.