I read somewhere they said that 1:1.5 unun could solve the 50 Ohm if the transmitter is to design on 50 Ohm.
Is 1:1.5 unun a Balun?

I still have a lot of astro RG6 at home and do not want to waste them , maybe it is time to research on doing EE calculation on doing 1:1.5 Unun, invest a SWR meter

This post has been edited by eddie_lim: Sep 10 2014, 11:06 AM

MARES is organizing a National Field Day at Taman Tasik Cempaka, Bandar Baru Bangi, on 15-16 Sept 2014. Let's come together and to 'ceria-ceria kan' the event.

For those who want 9M's autographs/referal to complete the AA form, can come and meet them in person. 9M, especially the 2 characters (9M2xx) people are very humble
and can explain ALMOST anything about Amateur Radio. Lots to learn from them.

It is 24 hours event starting from 'after office hour' to the next day. Anyone who have time can come and learn from the experts. Lots of 'cerita' to be told....

http://www.mares.org.my

See you there.
Thank you.

73,
9W2GNU
"GNU is Not Unix"

This post has been edited by bahathir: Sep 11 2014, 03:04 PM

To wiraone

Sorry, pagi tadi tak sempat nak QSO dengan Saudara. Komuter dah sampai dan tak sempat nak 'break' nak infokan. Saya sempat dengar Saudara QSO dengan 9W2ZSH, tapi tula, tidak ada peluang nak bergabung.

Ketika itu QTH: Stesen komuter UKM. 'Window" untuk RX dan TX agak terhad. Saya kena jalan--jalan sambil ubah posisi antena, mendatar, menegak, ... hinnga saya dapat RX yang paling clear, itupun, ada juga hissing sedikit sebanyak. 9W2ZSH melaporkan R3 dengan sedikit hissing di background. Radas yang saya pakai ketika itu adalah handy 5W, Baofeng dengan antenna homebrew 1/4 lamda, yang diperbuat dari teras cable Astro. SWR agak tinggi, 2.2:1 tapi, handy tidak panas bila TX pada jangka masa yang lama. Kira OK latu, sebab hanya sedikir Reflected power yang ditendang kembali ke transceiver.

This post has been edited by bahathir: Sep 11 2014, 03:25 PM

No problem boss, there will be a next time. On the field day, I will not be available on that date, balik kampung, cousin getting married

On the homebrew antenna, be careful with your SWR, transmitting using handy is okay since you're transmitting on low power. Some transceiver will change the transmit power when it sense a high SWR (2:1) to protect the final.

No problem.. Congratulation to your cousin.

Yes, you are right. high SWR antenna is 'unhealthy'. But, how high is to be considered as bad? Some say, SWR 2.5:1 is the upper limit. Yeah, if you are playing with 20W/50W/100W/1kW/10kW is a different story, because who owns that kind of powerful transmitter, will know the correct antenna system.

1W/5W can be considered as a 'toy, eventhough 5W can travels half around the world. .. I have another temporary 5/8 telescopic, mounted on hombrew base/stand and put it "in" attic. The SWR for this antennna system is arround 1.2:1 at best, and yes, it travels further, 1W is enough to reach reach repeaters 50-60km away from my base, and stiil get R5.

Ok, see you later, on air or online.

73

Salam sifu2

Saya baru take intrest on HAM Radio. Sebelum ni duk jenguk2 SDR je.
Setakat ni baru membaca2 guideline dan forum2/blogs.

I understand that license application perlukan 2 orang class A. Wondering kalau ada siapa2 di Cyberjaya atau berdekatan boleh mohon tunjuk ajar ataupun ada class/seminar tentang Amateur radio.

Kalau frequency band tu macam mana nak tahu orang2 converse kat mana? Frequency dia ada channel allocations untuk scan? Kalau handheld HAM boleh pick up jugak tak atau cuma yang ada external antenna boleh pick up conversations?
[Ah, I see that there are Simplex VHF frequency and channel allocation plans and according to area, there are channel allocations]

Does Cyberjaya have any repeaters? How do you guys listen as SWL if there is no repeater around?


Dulu dalam class ada jugak belajar pasal antenna design dalam subject Electromagnetic Theory tapi dah lupa

Last question: Do I need an AA License to carry my handheld that can tune in to the Amateur band?




This post has been edited by aminpro: Sep 13 2014, 05:01 PM

this will shed some light to me

anybody looking for base antenna?i got 1 extra wanna let go,ill take for RM100





3- step single band,silver brand.COD balakong,sg long,etc

There will be another test for this year, no idea when it will be, probably Nov or Dec.

As what posted by Bahtiar, there will be a field day this coming Tuesday at Bangi, not that far from Cyberjaya. Feel free to drop by and ask questions there. There will be 9M2 with three alphabets that are well versed with ham radio too, so, don't feel that you're shortchanged by them there

On simplex or channel allocation, there isn't any that is specific by area. Usually the hams around the area will choose a simplex channel that will no interfere with others and make it their common channel for that particular area.

For ham radio, repeaters usually located at higher altitude, Cyberjaya tak dak bukit nor gunung, so, most of the repeaters are located at Genting. Download Repeater.My app for Android, it will help you finding the nearest repeater(s) to your current location.

SWL usually listen to shortwave, and not VHF/UHF If you would like to listen to QSO on VHF/UHF, just get yourself that SDR dongle with a good receiving antenna and you'll find many interesting frequencies out there that you could monitor and not only on ham radio freq. range.

You need AA to carry any transceiver, but heck, no enforcement done by the authorities, so nobody cares if you've AA or not

This post has been edited by wiraone: Sep 13 2014, 07:17 PM

Unfortunately I have exams next week so I think my best bet is to join the class I saw in FB(SK Setiawangsa on 20/9) if they announce for walk-in availability.

Thank you for all the answers
Hope I could join as soon I get my license and AA.

(I scared kena confiscate if I carry without AA)

Referal from 9M (class A)
Ya, dara kena cari 2 orang 9M untuk tandatangan dari 2 orang 9M. Nak cari mana? Agak susah sikit, kecuali anda rajin bertandang ke eyeballs atau kelab-kelab radia amatur,. Saudara boleh ke laman-laman kelab-kelab radio amatur dan hubungi mereka untuk bantauan. Inilah kaedah saya yang saya guna, dan kebetulan salah seorang dari 9M tu tinggal berdekatan dengan tempat tinggal saya .

Lazimnya, untuk 2m pengamala radio amatur akan pakai repeater. Untuk kemudahan besama, kita boleh guna applikasi Android Repeater.my hasil karya mypapit (9W2WTF)

https://play.google.com/store/apps/details?...bile.myrepeater

Untuk kemudhan saya, saya telah mengkompilasikan senarai 103 2m/70cm repeater kedalan handy saya. Jadi kalau 'scan' saya scan pada channel mode.

Ya kita boleh scan simplex, dari 144 MHz ke 148Mhz, Tapi ianya mungkin mengambil masa sedikit.

Saya pun baru menceburkan diri dalam dunia HAM. Saya hanya ada satu handy murah, 5W saja. Saya ada beberapa antenna, Semasa portable, saya bawa antena 1/4 wavelength (homebrew/buatan sendiri) dari kabel coax ASTRO. Kat rumah, saya ada antenna teleskopik 5/8 yang diletakkan dalam loteng/attic. Sebenarnya, dengan antenna yang betul, kita boleh capai (rx/tx) dalam lingkungan 50km radius. Jadi jikalau berada di Cyberjaya, Saudara boleh capai repeater di Genting, Bukit lanjan,... Aplikasi Android yang saya sebutkan tadi boleh membantu.

Bwa handy tanpa lesen.
Lesen diperlukan untuk TX (transmit). Jadi kalau bawa handy tanpa TX, mungkin tiada masalah. Tetapi, bagaimana untuk 'menjawab' atau membuktikan yang kita TIDAK TX kepada penguat kuasa? Jadi, lebih selamat, RX sembunyi-sembunyi atau simpan saja kat rumah.


Semoga sedikit sebanyak dapat membantu Saudara dan harap kita boleh ber QSO di jaluran Radio Amatur.

Acutally, RAE is held montly, the computerised RAE. I sat the computerized RAE several months ago, and gor the result as soon I clicked 'SUBMIT' button. But, there is 20 seats quota for the exam, and nned to contact the right MCMC staffs.

Thank you.

Oooooo I see. Thank you for the information. Kalau handheld dengan external antenna yang macam mana tu boleh capai repeater Genting? Saya sekarang baru nak starting2 ingat nak try pasang antenna kereta yang magnetic tu je kat luar rumah test.
Saya ada Nagoya NA701 tapi interference dia kuat sgt kalau dekat band 477 tapi macam clear je kalau UHF.


Rasanya kalau pergi approach direct dekat SKMM Cyberjaya terus boleh ada chance ke mintak monthly RAE tu?

Untuk permohonan RAE berkomputer, sila hantar maklumat dibawah kepada
syaaban.abdhamid@cmc.gov.my

Nama
IIC
Alamat
Telepon
Email

Atau Saudara boleh pergi beurusan terus ke MCMC di

Malaysian Communication and Multimedia Commission,
Aras 1, Prima 1
Jalan Teknokrat 5
63000 Cyberjaya
Selangor.


477MHz tu ... itu band 'percuma' tanpa lesen. Tapi kalau boleh jangan kacau sebab kebanyakkannya digunakan oleh kontraktor bina binaan. Jangan ganggu mereka buat kerja dengan TX pada frequensi tersebut, kerana lazimnya mereka guna untuk bagi arahan kren bawa barang berat keatas bangunan.

Terima kasih.

This post has been edited by bahathir: Sep 15 2014, 01:15 AM

Thank you so much for the information

This is new to me, on the monthly online test thingy. Do update it here on your progress amin, the last time they had few tests, I thought they were just for few occasions as trial-run. If they've this as regular monthly test, that will be a good news to us since we do not need to wait for the biyearly exams. It took ages to wait for the exam and to get the result too before.

It is not 'online' RAE test. You still need to go to the MCMC to sit the test, in their computer lab. The quota is 20 seats.


This is a very good write up how to get AA. I followed most of the steps on that page.
http://9w2edu.blogspot.com/2012/08/9w2edu-...a-aparatus.html

Actually, the Guide's documents from SKMM are very good. Read it and some of answers are in the documents If you are following Amateur Radio club/society, it will much easier to undertand how to get the AA.

73

This post has been edited by bahathir: Sep 15 2014, 01:27 AM

Wow, now this thread is hot back again.

I also been wanting to get AA for years and got it last June, just do it, just study the pass year Q&A and you guys can pass very easy for Class B AA

Anyway, if anyone here wanted to get their AA form signed by 9M-ers, some forumers here are very willing to help, they are nice guys....

73

9W2LWK

Will do! Probably will try to request for the next nearest possible exam. I've seen the past questions and it seemed straight forward. lol
Probably will start to request for signatures for the AA after I successfully get a seat for an exam.

For new comers to the hobby, a guide on how to choose your equipment:

http://www.arrl.org/buying-your-first-radio

http://www.arrl.org/files/file/Ham%20Radio...0Radio-2014.pdf

Tahu tak mana nak cari mobile radio or rig yang 2nd hand/lama?
Apart from the FB Group RAFS yang tak berapa banyak jual 2nd hand mobile transceiver.