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Hobbies Amateur Radio User V2 !, HAM Radio

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bahathir
post Oct 9 2014, 11:19 AM

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QUOTE(wiraone @ Oct 9 2014, 11:01 AM)
But becomes a legend for the wrong reason, surely nobody wants it. As said, join activities conducted by others and stop being assobiyah to a single group smile.gif You'll learn a lot more for sure. Been in your shoes before when I started this hobby 7 years ago.
*
Yes we only have 2 choices, to be a GOOD or BAD 'legemd'. Obviously, the the GOOD one la. smile.gif. Yes, 'assobiyah'/clan/team A-team B, ... is BAD, becaue the benefit of the knowledge is only for certain group only. Amateur Radio is a hobby. The hobby which may improbe ourselves and others too. We like share knowldege among us, whithout any strings/group/team attached.

Let's unite, and not restricted to/by any groups/team/assobiyah.

I heard 'bad' stories among Amateur Radio clubs. Most of the problem are because of 'MISUNDERSTANDING' and EGO. Remember, Amateur Radio hooby is about sharing and co-operation. So, put our EGO and TRY to understand the situation. Let's come together and starts new era. The golden era is in our hands.

Thank you. smile.gif
bahathir
post Oct 9 2014, 11:51 AM

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QUOTE(wiraone @ Oct 9 2014, 11:11 AM)
Most of us have changed the way we discuss and share our knowledge. It is not convenient for most of us to sit beside our radio, listening to some people talking about something that we might not understand/technically challenged. Most of us are now on facebook and whatsapp, both applications are available across platforms and this is where we share/discuss our finding, experiments etc. It is much easier for everyone no matter where you are and see what someone has done when the photos, instructions being shared. No more, if you want to know, come eyeball or come to the air thingy .. This is thing in the past.

Oh btw, do join us here in the following FB groups/SIGs:

https://www.facebook.com/groups/My10mg/
https://www.facebook.com/groups/myaprs/
https://www.facebook.com/groups/205577956166963/
https://www.facebook.com/groups/224139084455762/
*
Yes, we have lots of alternative ways to share our knowledge. Why not using Amatuer Radio as one of the PLATFORM? This era may be over, but, why not making it come back? Yeah, FB, whatsaap. twitter are our main communication method nowdays. No doubt is it more precisely to targeted users, but isn't it nice if we can BROADCAST it to ohters. There are still people who wnat to know out there.

In Malaysia there are LESS than 11k licensed operator, and how many of them are active? How many of them want to learn more about technical? How many of them able to share the knowledge? Yeah, some of the knowledgeable operators are goind HF. No doubt Amateur Radio is close related to HF. But, VHF, UHF also Amatuer Radio bands, and no need to be discriminated. There still may ham operator like me who are only have VHF/UHF tranceiver. Yeah, it just a hobby and eveyone has the choices. smile.gif


Thank you


;
bahathir
post Oct 9 2014, 01:15 PM

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QUOTE(wiraone @ Oct 9 2014, 12:36 PM)
Hehe, nobody abandoning the radio to share their knowledge. You can still hear them, the hams, talking, about their home brew antennas to some new satellites operation sometime on the local repeaters. On 40m, you can hear 9Ms on the air regularly in the evening talking, from just rag chewing to some technical stuff. But for 9Ws? You'll be restricted to local repeaters. The 10m is not usually open for local propagation. Why can't we go for the peninsular wide linked repeaters you may asked? None are operating fully right now. So, the best platform for some of us is still FB where someone from Sabah & Sarawak could join in the discussion too.

BTW, some of us misunderstood, amateur radio means talking on the radio. This is wrong.. there are more than that, experimenting is one of them. Okay, some will say, we brew our own antenna but that is not all, there are more that can be learned. There are different modes available for us. Depending on the conditions, those who've VHF only transceiver could do DX across countries using satellites on whatever modes available. Starting I believe mid of this year, SKMM has allowed 9Ws to use digital modes, explore on them. If you joined the correct SIGs, you can be sure to learn more things about ham radio.

Here is my story, the first few years when I was in the hobby, I sat beside my radio all night, my wife wasn't happy with it for sure. I had my HT on my belt whenever I go, and monitor all the repeaters around KL. Met many ham friends, mingled around, joined club, got involved with their activities, was in the clubhouse almost every weekends and then I got bored. Why? After a while, talking on the radio is not fun anymore, people started fighting on the air, repeaters regularly went down. Then I met a group of hams who were interested in going more than talking on the repeaters. Two groups actually, APRS and 10m DX. One that teach me that you can do more on VHF/UHF by using different mode, one that teach me that you can get contact with others from different countries by using satellite. Experimenting with PIC, GPS, routers and stuff to get an operational APRS network in Malaysia. The other one teach me that I could do more with my 9W license than talking nonsense on the repeaters, joining the DX activities, either alone from my shack or in a group expedition.

The only thing that deter new comers to the hobby I believe their resistance to upgrade/move up and believe talking on the repeaters will be the only thing that they wanted. And being in this century, I believe we can gain more knowledge by not restricting ourself, embrace the technologies and be more open. Oh, I know some 9M2 otais do belittle us new breeds that embraced new technologies as just a 'Google experts'.. but heck, we've shown what we're capable of by being expert in google smile.gif

Psst, some of the discussion found in some of the FB group.
[attachmentid=4164035]
*
Yes, Amateur Radio is not just about talking. It has many other things that can be done. Before I got my AA, seeral month ago, I already have SDR and, 'listened' to many things, from chit-chating on commercial trunked radios, crane operators at construction sites, aircraft landing/takeoff (airband), ... and also digital mode, such as DSD/C4FM, POCSAG (pager), ACARS, ADSB, ... Yes, there are MANY things that you can do and hear using radio. Some f us, just like to monitor/listen. I am curious, some if not most of the 9Ms I have met are monitoring Airband. smile.gif They noticed the "Perdana One" is frequently come and go from airport . smile.gif Seem that our PM is a very busy man. smile.gif


Yes, it is great to have SIGs, to improve knowledge. How about share that knowledge, basic knowledge is enough to others. Who konws, one of the monitors are interested. That is what I meant about the knowledge sharing. I like to see the technical and knowledge (chit-chat:technical) ratio in 2m/70cm band getting higher/better. Currently from 90:10 to 50:50. And yes, the choices is still in our hands. smile.gif


Yes, not need for me to monitor the repeaters to get knowledge. the knowledge is out there in Internet. I can read ARRL books/magazine from anywhere, (if have Internet access smile.gif) . I just like to hear some technical discussions in that bands. Yeah, it is just my feeling, nothing to be bothered. smile.gif

Thank you...
bahathir
post Oct 9 2014, 02:38 PM

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Menarik cerite tu Saudaraku piju. Ya, itulah yang saya dengar. Inilah adat manunisa. Masing-masing ada pemikiranya tersendiri. Yang bersikap 'ego' tu, apa boleh buat. Sabar dan tergurlah dengan kebaikan. Ya, masa akan berlalu, yang hidup pasti mati. Yang muda akan jadi tua. Yang junior akan jadi senior. Yang 9W pula,...tak semestinya boleh jadi 9M smile.gif. Masing-masing silih berganti.

Mungkin saya baru sangat dalam dunia Radio Amatur di Malaysia, dan tidak banyak benda yang saya lihat/dengar/jumpa. Sedih juga lah, ada perkara sebegini. Lihat cerita pasal Radio Amatur, timbul masalah perselisihan antara rakan-rakan. Saya ingin berkawan dengan SEMUA orang. Tetapi, tak semua orang nak jadi rakan saya. Ini saya tak boleh berbuat apa-apa, sebab itu PILIHAN dia.

I like to hear more about the 'problem/clash', but, if I knew it, it still doesn't improve/solve the situation/problem. What choices we have? Proceed what we like to do. The knowledgeable 9M/9W can still share their knowledge to others. I don;t the the 'clash/problem' is the obstacle/wall to make other people more knowledgeable.


3 weeks ago, I had QSO with 9W2EDK and the gangs on 9M4RBC. Mereka sangat inginkan zaman kegemilangan kembali semula. Sekarang sudah berkurangan aktivi berkaitan radio amatur. Yelah, ramai sudah berkeluarga dan komitmen sudah berbeza. Pembahagian masa antara keluarga dan hobi juga bertukar sama sekali. Persoalannya, kenapa era keemasan boleh wujud ketika itu, tapi tidak dimasa kini?
Ramai juga yang rakanrakan HAM baru. Sekrang ada banyak kelab-kelab, tapi, kenapa tidak seperti dahulu? Nak berpecah menajdi kelab-kelab, bukannya masalah besar, tetapi PENGISIANnya. Sebab itulah ada MARL, gabungan kelab-kelab. Setiap kelab boleh berkongsi-kongsi atau memnita bantuan antara-antara kelab melalui MARL.

Ya, untuk mengendalikan kelab memang sukar dan banyak cabaran. Sepatutnya kita besatu untuk menyelesaikan masalah, bukannya menimbulkan atau membesarkan masalah. Maaf, saya tidak tahu permasalahan yang sebenar dan bagaimana nak menyelesaikannya. Ianya akan berbalik kepada PILIHAN kita. Kemana kita nak pergi... Kemana arah tuju kita... Bagi saya radio amatur dalah hobi teknikal, maka sama-samalah berkongsi ilmu teknikal tanpa mengira perasaan, kelab, perselisihan, pergolakkanm .... smile.gif
bahathir
post Oct 9 2014, 03:02 PM

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QUOTE(wiraone @ Oct 9 2014, 02:43 PM)
Bang, let me tell you something. We've list of activities in line, full till the end of the year. No such thing as berkurangan. I believe you've been brainwashed.
*
Yes, I know there are lot's of activities. Almost every months my friends invited me to such activities.. but, I only said what I heard around me. That's is the problem being too many clubs and not 'broadcast' in the correct channel. We already know, there still many HAM operatos on 2m/70cm band, especially the 'newbies' like me. If nobody broadcasts the activities, how do we know about it? Yes, there are club's webpages, whatsapps groups,.... but, is it covering all 11k of the licensed radio amatuers in Malaysia? smile.gif

Just my 30cents (after 10 cents subsidy reductions) opinion.

Thank you.
bahathir
post Oct 9 2014, 03:43 PM

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He heh eh smile.gif. Nice one ruth.

The is no best way to broadcast, but there are effectve ways. Broadcast the activities through MARL, and all the clubs under MARL can relay it to the club's memberss, either on 2m check-net or time by time on club's repeaters., or the alternatives broadcasting methods.

Nothing is perfect.
bahathir
post Oct 9 2014, 03:50 PM

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QUOTE(ruth @ Oct 9 2014, 03:34 PM)
let discuss something more useful, I'm sick of this.
History is apart of our life, but HIS-story remains as his story
*
History also important in our life. We can see how other succeed and failed. Improve ourselves to beo successful and prepared ourselve to prevent failure. We are parts of the history.

Sorry for bringing up the 'boring' subject.
bahathir
post Oct 9 2014, 05:17 PM

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Saudaraku piju yang dihormati.

Benar kata Saudara, kita belajar dengan ramai guru/rakan. Kita dengar pada semua pihak. Ya, era keemasan itu terjadi kerana beberapa faktor yang Saudara telah nyatakan. Sekrang ini pun, kebenyakkan orang baru menceburi hobi ini adalah kerana ada kaitan dengan hobi utamanya. Contoh, Hobi utama adalah 4x4, maka radia amatur hanyalah pelengkap atau hanyalah sampingan. Jadi, jelaslah dimana prioritinya. Kelengkapakan radio pun murah dan mudah dimiliki, lebih-lebih lagi 2m band. Hantar saja jalopy/anak gajah ke kedai, semuanya settle. setup repeaters' frequencies dan tekan PTT saja. Kslsu ada problem, hantar ke kedai atau minta kawan betulkan. Kenapa? sebab bagi golongan ini, radio amatur hanylah pelengkap hobi utama.

Ya, semuanya bergantung kepada diri kita sendiri. Kalau nak belajar lebih, kita akan berusaha lebih, cari lebih, ... semuanya lebih... Nak seribu daya, taknak seribu dalih. Saya katakan yang Ramido Amatur adalah hobi teknikal. Penggemar radio amatur patut mempelajari dari sudut teknikal dengan lebih mantap lagi. Mungkin realiti sebenar Radio Amatur di Malaysia ini tidak seberapa indah. Sekurang-kurangnya ada yang gembira menikmati hobi ini. Mereka gembira, kita pun gembira.

Betul, kita kena berkenalan dengan lebih ramai lagi. Ini juga fungsi asas Radio Amatur, menyambungkan tali siratulrahin. Kita berkenalan di udara, walaupun tak pernah lihat rupa. Kita beri signal report, walaupun kita tak tahu diman QTH dipeta. Ya, benda-benda seperti itu pun penting juga, walaupun ianya bukan dari sudut teknikal.

Teringat balik, zaman IRC chatting pada penghujung 1990an. Kita buat kawan seramai yang mungkin. Ya,memag ada 'yang tak betul', tapi, itu adalah lumrah alam. Berjaga-jagalah. Mula-mula syok lepak kat channel yang popular sepert #mamak, #kampung, ... tapi last-last, pergi buat channel sendiri... smile.gif Sedihnya, yang meminggirkan kita dari kumpulan utama adalah, 'content'nya atau pengisiannya. Banyak yang merapu dan merepek. Kita buat channel sendiri pun, bukannya boleh membperbaiki keadaan di channel utama. Ianya akan terus jadi macam tu jugak. Yela, apa salahnya, sekali sekala jengok, dan sampaikna ilmu yang berguna. Nak ambil atau tidak adalah PILIHAN mereka. Rasanya sama juga kes di dunia Radio Amatur kita ini.

Tak mengapalah, masing-masing ada alasan dan halangan tersendiri. Kita mampu mengubah dan berubah. Hanya nak atau tidak saja.

Okalah Saudara-saudara ku, piju, wiraone, ruth,... Saya tidak apa nak sampaikan lagi QRU. Hanya sekadar meluahkan perasaan. smile.gif

Salam sejahtera,
terima kasih
73.

This post has been edited by bahathir: Oct 9 2014, 05:31 PM
bahathir
post Oct 9 2014, 05:58 PM

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Terima kasih Saudaraku, piju diatas pencerahan. Ya ini pun dikira ilmu 'tekneikal; juga, walapun guna platfom LYN. smile.gif Yes, I like this kind of discussions.

Sure, I'll keep in touch with wiraone, smile.gif...
bahathir
post Oct 10 2014, 10:39 AM

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"Buang yang keruh, ambil yang jernih"

As I said earlier, Amateur Radio is about connecting people, with the same objective, on the same frequency. We are free to have different opinions, views,... and don't let it to be the obstables to prevent us to be friend.

Semangat Radio Amatur yang suka tolong menolong, bantu membantu, harus dipupuk dan dibajai setiap masa dengan kasih sayang diantara satu sama lain. Dalam beberapa sesi eyeballs dengan rakan-rakan HAM lain, saya nampak semangat itu masih ada dan segar.

Dalam bermasyarakat dan berkumpulan, sudah tentu ada perselisihan faham antara satu sama lain. Ada yang terbawa-bawa isu tersebut hinggakan boleh mempengaruhi orang lain yang tidak terlibat secara terus dalam isu tersebut. Seperti apa yang Saudara piju sarankan, cari dan jumpa ramai orang untuk mencari ilmu. Ya, memang betul tu, dan itu apa yang saya cuba lakukan. Sekiranya ada isu antara kita dan orang lain, sepatutnya tidak harus memberi kesan kepada semangat tolong menolong dalam hobi Radio Amatur ini.

Jadikanlah hobi Radio Amatur ini sebagai hobi yang membina jiwa yang sihat.

Terima kasih,
73
bahathir
post Oct 15 2014, 02:33 PM

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QUOTE(wiraone @ Oct 14 2014, 12:51 PM)
Have you got your SDR dongle? I've just ordered HackRF and wondering what kind of packaging they'll use. I don't want to go an answer Custom's questions..
*
HackRF One:
Nice choice, and one of my wishlist's shortlist. smile.gif It can TX 0.5 Watt, so, RF Amp is needed for more ooomph! smile.gif

BTW, I visited 9M2NZ's house in Semenyih, and I saw him putting auido distributor component/board into a nice casing. I wonder where he got the casing.. smile.gif

Loofking forward for your review.

73

This post has been edited by bahathir: Oct 15 2014, 02:39 PM
bahathir
post Oct 23 2014, 11:49 AM

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Yesterday, I build another homebrew anteaan.

AFTER
Attached Image


Yes, quite similar to my previeous coax cable wire antenna... so, from what the antenna is made of? smile.gif You can see a cable cutter beside the antenna. So guess the 'thing' first, before clikingthe spoiler smile.gif


BEFORE
» Click to show Spoiler - click again to hide... «



Basicelly the antennas are dipole. I coiled the ground/counterpoise wire to the base of the antenna. It doesn;t make any differences in SWR, but, it really makes the handy less hotter. I made shorter antenna from coax cable (17cm), and it had SWR 6:1 and above. Without the conterpoise, the handy was very warm. After the counterpise being added, suprisingly, the handy runs much cooler, similar, when using low SWR (1.2:1) antennas.

Lately, I heard may HAM operators are using handy on 'ceck net'. Some are portabe with 1/4wave. I am not sure wether it is directly mounted to the handy or otherwise.

FInal thoughts
1) 1/4 antenna with counterpoise it genarally good for handy. It may diffiecult to carry around, because of the length (50cm), but, considering the performance, I recommend it to others.
2) Get the best TX window. Move around and adjust the antenna horziontal, vertical, 45 deger, .... until you hear the best and clean audio ignal.I am using headseat so, I don't have to talk to the handy's microphone, and able to move the hany freely at nay position.


This morning I TX 1W from INSIDE the KTM Komuter to 9M4RZS, between Segambut and Kepong Station, QSO with 9W2PDT and 9W2RFN, and they gave R4. Yeah, I know, TX 3W on HF can reaches 7000km) during the best propagatation. So TX 1W on VHF/UHF is nothing for some HAM operators.

On other occasions, while waitng Komuter at Putra Station (near PWTC), i had QSO with 9W2TZP and 9W2ZEF. 9W2TZP located at Air Panas, has a very good base station antenna setups. I got R5 on 1W, and 9W2ZEF gave me R3. Nice to be able to TX for the 'center' of Kuala Lumpur, with lots of taller buildings and QRM from the JAMMERs. Yes, thera jammers for certain frequencies along KL Sentral setating and Kuala Lumpur Station. How I knew it? Hint: SDR! Not need SDR la... just scan....and see how many time the it stops scanning..., but SDR is much faster way... smile.gif


Thank you for taking time to read this 'Not So' advanced post.
73

This post has been edited by bahathir: Oct 23 2014, 12:01 PM
bahathir
post Oct 24 2014, 11:44 AM

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QUOTE(aminpro @ Oct 23 2014, 02:20 PM)
Do you really need an SWR meter or you could just measure the resistance and match it?

I've learn how to use the Smith Chart back then to measure SWR by calculation wondering if it can be used in the practical manner as well.
*
I measaured the SWR with SWR/power meter. If I calculated the impedance using these formulas in articles below

http://www.66pacific.com/calculators/xl_calc.aspx
:http://www.ee.scu.edu/eefac/healy/indwire.html

I combined both forumals, and use Pari?GP calculator,.. I got.... near to 50 Ohm


QUOTE
$ gp
          GP/PARI CALCULATOR Version 2.6.2 (development 15937-6089866)
          amd64 running linux (x86-64/GMP-5.0.1 kernel) 64-bit version
  compiled: Jan  8 2014, clang version 3.5 (trunk 198672) (llvm/trunk 198671)
                            threading engine: single
                (readline v6.2 enabled, extended help enabled)

                    Copyright © 2000-2013 The PARI Group

PARI/GP is free software, covered by the GNU General Public License, and comes
WITHOUT ANY WARRANTY WHATSOEVER.

Type ? for help, \q to quit.
Type ?12 for how to get moral (and possibly technical) support.

parisize = 8000000, primelimit = 500000

#l = wire length in m
#r = wire radius in m
#f = requency MHz

? l=0.52; f=146; r=0.001; 4*Pi*f*l*(log(l/r)-1)/100
%1 = 50.123568344905732015405128905379202113
I have short rubber duck antenna which come with the handy, and suprisingly I got SWR 1.07:1. I measured the TX field strehngth using SDR, and the 2.4:1 1/4 antenna TX much much stronger than 1.07:1 rubber duck antenna. Good SWR value doesn't mean strongner TX. Even dummy load also has 1:1 SWR, but TX nothing... smile.gif

SWR is to evaluate how efficient the power bening TXed through the antenna system. We need a field strenght meter, or radio with strenght meter, or SDR, to measure the strong the TX signal.

I have 5/8 telescopic wiht ground plane antenna on attice (under the roof), which has SWR 1.2:1 and TX strenght 3 dB more than that simple 1/4 antenna. So a much longer omni directional antenna such as J pole, Slim Jim will TX much stronger signal.

Thank you

73
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