10 November 2011

Penggunaan radio "Walkie-Talkie" di dalam SRS / KRT untuk pemantauan kejiranan


1.0         OBJEKTIF

Tujuan artikel ini adalah untuk memberi informasi ringkas namun penting kepada pihak yang berkenaan tentang penggunaan radio komunikasi (atau dipanggil ‘walkie-talkie’) di dalam SRS / KRT di kawasan yang berkenaan.

2.0         LATARBELAKANG

Komunikasi adalah salah satu perkara wajib yang kita lakukan saban hari. Ianya pengubat kepada banyak permasalahan antara manusia. Kita sentiasa menggunakan telefon untuk bercakap dengan seseorang yang berada di lokasi lain. Alangkah baiknya jika kita tidak perlu berbelanja untuk berhubung dengan seseorang?

Di dalam soal keselamatan, komunikasi yang segera dan cekap adalah sangat penting. Setiap saat yang berlalu pada masa kecemasan, jika dimanfaatkan dengan berkesan boleh menyelamatkan nyawa serta harta benda.

3.0.   PENGENALAN TENTANG KOMUNIKASI DUA HALA

Sistem komunikasi dua hala sebenarnya berlaku setiap hari. Penggunaan telefon sebagai contoh, adalah satu cara berkomunikasi dua hala. Cuma, ianya berbayar. Setiap panggilan telefon kebiasaannya akan dicaj penyedia perkhidmatan.

Penggunaan alatan yang lebih dikenali dengan nama jolokan ‘walkie-talkie’ adalah sangat praktikal bagi ahli SRS / KRT. Ianya murah bila dilihat untuk jangka panjang. Setiap perbualan tidak dicaj dan yang paling penting, hubungan komunikasi itu berlaku sepantas kilat dengan tiada masa menunggu.


4.0.   FAEDAH

Beberapa pulangan yang dijangka bakal diperolehi adalah seperti berikut:
  • Pengetahuan dalam asas frekuensi di dalam komunikasi kepada ahli
  • Perkongsian maklumat di antara ahli SRS / KRT serta masyarakat sekeliling yang berlaku dengan lebih efektif.
  • Pengendalian komunikasi yang lebih efisyen pada sebarang acara atau ketika waktu kecemasan dan bencana.
  • Satu ‘panggilan’ boleh menghubungkan ke semua alatan radio yang lain (yang berdekatan & berkongsi frekuensi yang sama) secara serentak jadi maklumat disampaikan ke ramai orang dalam satu-satu masa.

5.0    CONTOH SENARIO KEJADIAN KECURIAN

Rumah Pak Ahmad dimasuki pencuri. Pak Ahmad menyedarinya tetapi pencuri sempat melarikan diri. Pak Ahmad merupakan salah seorang ahli SRS / KRT di kawasan kejiranan beliau.

Pak Ahmad lantas menyebarkan perkara kecurian ini menggunakan alat radionya dan maklumat ini terus diketahui oleh semua ahli lain yang mempunyai alat radio masing-masing secara serentak. Dengan ini, secara cepat mereka boleh menghalang setiap laluan keluar di kawasan tersebut atau bersedia di tempat strategik untuk cuba menangkap pencuri tadi.

Bayangkan komunikasi ini berlaku sangat pantas, dan penggunaan telefon bimbit pada ketika ini mungkin akan merugikan masa kerana kelewatannya untuk menyebarkan maklumat kepada seorang demi seorang. Kelewatan bermakna pencuri tadi dapat melarikan diri.


6.0    KESIMPULAN

Tidak dapat dinafikan, penggunaan alatan radio ini sangat penting dalam kelancaran penyampaian dan penyebaran maklumat kritikal kepada semua ahli SRS / KRT. Maklumat yang pantas mampu menyelesaikan perkara dalam hal kecemasan dan keselamatan.

Kekuatan komunikasi di kalangan ahli SRS / KRT juga secara tidak langsung mampu menggerunkan individu yang berniat untuk melakukan jenayah di dalam kawasan terlibat. Ini boleh menghalang atau setidak-tidaknya mengurangkan jenayah itu dari terus berlaku.

Kini, anda tahu kepentingan alatan ini dalam kejiranan anda sendiri. Anda juga kini tahu alatan tersebut boleh di dapati dari kami. Hubungi kami untuk maklumat lanjut. Nombor kami ada tertera di laman ini. 

Hakcipta RadioMeal.Com - salinan dan penerbitan semula dalam apa cara sekalipun adalah tidak dibenarkan jika tanpa kebenaran bertulis dari pihak kami. 


22 March 2011

Positive review of Ronson RT26V / RT-26V VHF handheld transceiver / radio

** Please note: At the moment, we have stopped supplying this model. An upgraded version is available from our e-commerce website, i.e. Ronson RT88. Click HERE for more info. **

At first when I got this radio, I was quite surprised to see how small it is. On average, the size is similar to Yaesu's VX3R. It is like a mobile phone except with an antenna outside its body. Of course, the weight is just around 200 grams (with antenna and battery installed) this is surely one lightweight radio!


In my opinion, the built quality of this handheld is very acceptable. It doesn't feel as flimsy like some of its counterparts. Quite solid I might say, as much as the price you paid for.

The design for the keypad is somewhat different with common handheld looking at its arrangement. They are put in two rows for the numbers 0 - 9 and a column of function / setup keys (please see the above picture). For those who are well accustomed with the commonly 3 rows x 3 columns number keypad settings might find this one a bit awkward at first but it only takes a moment to get used to it.

The knob on the upper side of the body serves three distinctive purposes. Turning clockwise  / anti clockwise cycles through the menus or channels / frequencies. With a press of the lowest side button while turning it will adjust the volume. Finally, a push downward will cause the radio to turn on or off. Pretty neat!


The audio output is quite loud for its body. A volume at 0 level does not put the radio in full silence though. It will still have a little audio out at that level, just a little audio that is.

Another good thing about this radio is, the battery. It uses the 3.7v battery that can easily found in mobile phone shops. It is similar to those Nokia batteries commonly used today. This just tells us that we don't need to worry about replacing it in the future when we can get it at our nearby phone shop.


The maximum TX power is just 2 watts, suitable with its size and battery power. It has two power level of high and low.Though its only a small amount of battery power supplied to the radio, it is acceptable that the standby life with occassion TX, can 'live' the radio for around  2 days. I guess that is pretty much standard to most radios anyway.

The channel names can be labelled up to 6 alpha-numeric characters. This is pretty good as some radios can only fit 5 characters. For Malaysian amateur radio users for example, the repeaters name are usually comes in 6 characters callsign (for example 9M4RCD) so this is very helpful.


Channel scanning mode is available, but a bit slow when in operation. It also has FM radio receiver built in so we could listen to our favourite FM broadcast stations anytime. The earpiece/microphone-ptt jack is using the standard 2.5mm plug type. 

In short, I think this radio is worth for its money paid. For just RM250 (normal price), it is a very good deal! By the way, it comes with FREE earpiece!


Published specifications from manufacturer:


1) CH 128 , All channel scan and priority channel scan

2) Scan types :Carrier, time and search

3) Busy channel lock: carrier/QT/DQT

4) VOX sensitivity:0-9 levels adjustable
5) Transmitter power:High power and low power switchable
6) Squelch opening threshold: Receive field intensity should accurate (use the sq level to show the intensity)
7) Led backlight: On/off/automatic
8) Beep set: Beep on/off
9) Keypad lock function: Manual/auto optional
10) Transmit limited: off-270 optional
11) Offset set:0-xxmhz optional (confirm the max offset according to the band after adjusting)
12) CTCSS and DCS setting
     1. Receive only
     2. Transmit only
     3. 50 CTCSS and 104 DCS
13) +/-offset:+/-frequency optional
14) Offset step optional:12.5k/25k
15) Use Dot Segment to display on LCD
16) Select the LED/emergency call by programming software
17) Volume control knob to turn on/off the power
18) PC programming and store channel
19) Can use car charger
20) DC 3.7V single li-ion battery compatible with mobile phone battery
21) MINI compact size 84*48*25 cm
22) Output power: VHF 136-174mhz 2w
23) With most competitive price
24) CHANNEL step :  6.25/12.5/ 25/50/100khz

06 January 2011

Jingtong JT988 / JT-988 VHF Transceiver

This is a basic review of what I experienced in playing with this little VHF handheld transceiver from Jingtong, from China. It is called Jingtong JT 988.


It is a small sized handheld, suitable for a good grip. The buttons are wide enough for easy operations. The built is quite solid and does not really feel flimsy whilst holding it comparing to other few China made handheld radios.

The channel names can be labelled. No more boring "CH1" on the display, instead, we could name it for up to 5 characters/numbers per memory channel. Of course, some might comfortable seeing the frequency instead of channel name, and this can be done too.


Reverse mode is available for this radio. Sometimes, this feature is important when using the repeater where we could easily approximate other parties' distance while they are transmitting on the frequency. If a close distance transmitting friends are detected, it means we could move (QSY) to simplex channel so that the repeater could be used for other long distance communications.


The supplied operating manual is in English, though there are quite a number of spelling and grammatical errors discovered. Still, it can be used as a basic reference on how to operate this radio. Quite useful too!


The battery is 1300 mAh Li-Ion type, with a desktop charger that stops charging when the battery is full. Also, the radio also comes with an earpiece ptt/mic free of charge.


A couple of neat features for this radio are the LED flash light and FM radio capability. The LED is situated on top of the radio, and it can be handy if you need a quick illumination assistant when in the dark. The FM radio reception is also good to listen for broadcast frequencies available around you. Yes, these frequencies can be saved into the memory too!


All of these, for only RM290.00. Very good deal. Offer not to be missed!!! Contact us for details.

Please note, if the stock is unavailable, it may take 2-3 weeks for each order to be delivered (after full payment is received).