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Review TP -LINK WR740N

Posted by audiobbm on September 10, 2012
Posted in: DIY Audio. 1 Comment

Ini adalah consumer wireless router dgn harga cukup murah dgn harga dibawah Rp 200 rb.

Support koneksi Wifi 802.11 n cukup stabil dan kencang hingga 150mbps.

Saya menggunakan router ini untuk keperluan management bandwidth dirumah dan warnet.

Sejauh ini ( sdh 2 tahun lebih) router tp-link dapat berjalan dengan semestinya.

Berikut review singkatnya :

– Dengan processor 200Mhz dan memory 32mb, cukup untuk aplikasi dirumah atau warnet. Saya menggunakan ini untuk share koneksi speedy dgn 12 pc.

– Panasnya environment  sedikit banyak berpengaruh terhadap performa router, baiknya router ditempatkan yang sirkulasi udaranya bagus, apalagi dioperasikan 24 jam tanpa henti.

– Koneksi wifi cukup stabil, aman digunakan 24 jam tanpa takut koneksi terputus, terutama pada saat kita mendownload data yg cukup besar dari internet.

– Pembagian bw cukup mumpuni berdasarkan IP, sangat efektif untuk mengkelompokan user berdasarkan kebutuhannya.

– Ping dari laptop dgn koneksi wifi sinyal excelent, delay stabil di 1ms… cukup  buat game online.

– Firmware bisa upgrade/ganti pake ddwrt atau yg laen…

 

Segitu dulu deh, yg pasti sampai saat ini masih maknyoss…

 

bbm

 

 

 

Hari ini ESEMKA diuji….

Posted by audiobbm on February 27, 2012
Posted in: Beranda, Info dan Berita. Leave a comment

Setelah melalui jalan panjang yang berliku hari ini mobil SMK kembali diuji….

lihat link : http://oto.detik.com/read/2012/02/27/090612/1852088/1207/ini-dia-tahapan-uji-emisi-esemka

Saya doakan semoga sukses dan lancar. . Amien…

Pak walikota Surakarta dan Wakilnya... (pic from Detikoto.com)

Indonesia’s Legendary DIY Power Amplifier (150W OCL Amplifier)

Posted by audiobbm on January 9, 2012
Posted in: DIY Audio. 9 Comments

150W OCL STEREO AMPLIFIER

Of course this paper is not based on scientific research, but only my personal view because I often find this amplifier schematics and kits in electronics stores in Indonesia not only in Jakarta.

This is not a sophisticated amplifier, but a simple amplifier with a pretty good performance. This amplifier has been there long before I knew about electronics. You can find this kit in all corners of  Indonesia with many version. It is well known as the simple amplifier kit that many people have build it in Indonesia. Many amateur and professional builders who are very good at making these amplifiers.  They modify it to get big power and hold amplifiers are used for many hours. Even myself have several times made ​​this amplifier for many purposes and request from friends.

Amplifier is used for amateur and professional music concerts. Dangdut concert held in the usual entertainment events and weddings mostly use this DIY amplifier. The art show and shadow puppets also use this amplifier.

Base on this 75W power amplifier circuit we can make ​​a big power amplifiers. Generally, the output power amplifier raised by increasing the number of final transistors in parallel or bridge configuration. Originally the amp using a pair of 2N3055 and MJ2955 transistor at final stage. Now alot of builder using SANKEN 2SC2922 and 2SA1216 for final stage.

This is link of blogger who also write about this amp.

http://elektroarea.blogspot.com/2010/04/rangkaian-150-watt-ocl-amplifier.html

http://zemulyon-infoservis.blogspot.com/

http://elektronikakreatif.blogspot.com/2011/07/cara-mem-bridge-mem-btl-power-ocl.html

http://solfegio.indonesianforum.net/t3477-modif-pa-ocl-150w >> Indonesia’s DIY audio forum

Ronica SC-025, 300W OCL amplifier Kit Version, Produced by Siemcor Electronics Indonesia (source http://www.audio.circuitlab.org)

150WPA (1)

Bell BGR Schematics

 

And This is my version of  OCL Amplifier 150W (75+75). It’s a stereo amplifier using general component with original value, Except for final stage I use Sanken 2SC2922 and 2SA1216 . All parts to build this amp is easy to get. It cost around USD 12  for the amplifier kit and USD 30  for the power supply.

Photo-0186

This is my prototype. It’s easy to get this PCB, it sold at any electronics parts store

Since the amp doesn’t have any protection so I use a speaker protector kit to protect my speaker. If there some fault or bad final transistor this OCL amplifier could burn your speaker without mercy because the DC current is flow directly  to your speaker. This protector kit protect from DC current if there any fault at the amp circuit. It’s cost only USD 2, so it does not mean hundreds of dollars compared to the speakers.

Photo-0117

This is another project using the same basic circuit.

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      • Kit Home Amplifier, Active Speaker Modul
      • Speaker Protector
      • Subwoofer Plate Amplifier
    • Audiobbm Store
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        • Audio Power Amplifier
        • Crossover Pasif/ Passive Crossover
        • Gainclone, Chip Amplifier
        • Integrated Amplifier, Active Speaker Modul
        • Pre-Amp/Tone Control, Sub Filter, Crossover
        • Speaker Protector
        • Subwoofer & 2.1 Amplifier
        • Surround Processor
      • PART ELEKTRONIKA
        • IC Analog & Digital
        • Kapasitor
        • Relay, Switch, Connector
        • Trafo, Inductor, Core
        • Transistor
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      • POWER SUPPLY
      • Sparepart Blazer
      • TOOLS / INSTRUMENT
    • CARA ORDER BARANG
    • GUITAR AMPLIFIER
    • HOME & PRO AMPLIFIER
    • Ngoprek Chevrolet Blazer
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