KLONING POWER QUASI LANEY DELAPAN BUAH 2SC

Kloning Power Quasi LAney delapan buah 2SC disini adalah sebuah kloning Power dari produk ampli LANEY seri GC80 namun telah naik daya dan ada tambahan fitur.

Kloningan kali ini adalah membikin PCb Protoype nya dan memasang komponen sesuai dengan petunjuk.

Tulisan tentang GC80 pernah saya tulis di YOHAN FROM INDONESIA pada 14 september 2024 lalu dan kali ini saya modifikasi kembali karena ada beberapa komponen yang tidak sesuai dengan selera saya.

HASIL PROTOTYPE

Berikut ini adalah tampilan protoype LANEY GC80 yang telah ada fitur Subwoofer dan Tone Control berfitur Middle Sweep nya.

modul KLONING POWER QUASI LANEY DELAPAN BUAH 2SC

PENGGANTIAN TRANSISTOR YANG SULIT DIPEROLEH

Untuk informasi, saya terpaksa mengganti transistor pendukung rangkaian ini karena kesulitan memperleh nomer transistor ini.

Akhirnya saya menganti nomer transistor menjadi berikut:

  • BC212 ganti dengan 2N5401,
  • MPSA42 ganti dengan 2N5551,
  • BC237 ganti dengan 2N5551,
  • BC307AP ganti dengan 2N5401,
  • TIP31 ganti dengan 2SC2073,
  • TIP32 ganti dengan 2SA940.

Setelah transistor ini terpasang maka kita bisa melakukan tes modul ini.

modul KLONING POWER QUASI LANEY

HASIL TES MEJA

Tidak semua transistor Final saya pasang. Saya hanya pasang 1 set transitor yang ada komponen pengumpan OCP ( Over Curernt Protection ) saja.

Jika tes ini berhasil maka semua transistor akan kita pasang dan tegangan Supply kita naikkan ke angka yang lebih tinggi.

Pada modul ini menggunakan tegangan supply mulai dari 55VDC hingga 75VDC. Untuk membikin rangkaian ini optimal maka kita bikin 65VDC simetris.

Pada tes pertama ini menggunakan tegangan supply 35VDC simetris untuk bermain aman dan pencegahan kerusakan komponen transistor Final.

TEGANGAN OUTPUT MENDEKATI 0,00VDC

Ketika modul ini saya tes dengan tegangan 35VDC, Output terminal ke speaker terukur -0,06VDC. Ini masih aman. Namun ini harus kita sesuaikan untuk mendekati 0 mV.

TRANSISTOR VAS KEPANASAN

Pada tegangan tes 35VDC, transistor VAS mengalami kepanasan. Transistor yang terpasang adalah 2N5551 yang memiliki dissipasi daya 625mW menurut DATASHEETS.

Ketika saya pasang paralel transistor ini, panas transistor menghilang.

Ini berarti memerlukan dissipasi daya lebih dari 600mW pada transistor VAS.

MODIFIKASI ULANG KLONING POWER QUASI LANEY

Beberapa komponen yang terpaksa saya ubah adalah sama dengan yang telah saya jelaskan di atas, yaitu perubahan nomer transistor:

BC212, MPSA42, BC237, BC307AP, TIP31, dan TIP32.

Sedangkan komponen lainnya yang harus kita ubah adalah:

Potensio MID, arah putaran ternyata terbalik,

Komponen penentu freq middle diubah,

Sehingga skema berubah “SEDIKIT” menjadi seperti berikut:

SKEMA REVISI KLONING POWER QUASI LANEY DELAPAN BUAH 2SC

PERUBAHAN LAYOUT

Layout harus saya ubah kembali untuk menyesuaikan komponen transistor yang telah terpasang.

Hasil revisi Layout adalah menjadi seperti ini.

Bandingkan dengan Layout sebelumnya dibawah ini:

Berubah sedikit bukan?

Namun para ahli skema dan ahli PCB pasti paham dimana permbedaan 2 buah Layout PCB ini.

PERAKITAN ULANG KLONING POWER QUASI LANEY

Hasil Layout ini akan saya buatkan PCB kembali untuk pembikinan prototype.

Masih dalam proses.

Nanti apabila berhasil, tinggal mencetakkan prototype ini di tukang PCB terdekat.

Schematic LANEY lainnya ada di YOHAN FROM INDONESIA.

POWER OCL QUASI 80W LANEY GC80 MODIFIKASI 400W

Dengan mengganti transistor Final menjadi MJL21194/93 3 pasang maka POWER OCL QUASI 80W ini naik menjadi 400W namun dengan beberapa perubahan.

LANEY GC80 adalah power amplifier terbitan era 90-an

Tulisan tentang LANEY GC80 pernah saya tulis di BLOG INI namun hadir dengan versi Speaker Aktif dan tambahan Fitur Subwoofer menggunakan tegangan supply 80V.

Dalam tulisan ini saya akan mencoba membikin versi 400W dengan 2 set transistor MJL21194/93 dan tegangan supply 70VDC.

SKEMA POWER OCL QUASI 80W LANEY GC80

Berikut adalah potongan skema asli dari Power Amplifier LANEY seri GC80 setelah proses pangkas dan edit.

skema POWER OCL QUASI 80W laney

Tegangan kerja untuk rangkaian ini adalah 38VDC simetris. Dengan tegangan sebesar ini maka akan memungkinkan untuk menghasilkan audio output hingga 130W pada beban 4 Ohm.

Namun sepertinya produsen power amplifier ini membikin output tidak sampai angka maksimal dengan membari spasi daya.

Transistor Final yang terpakai adalah 2N3773 yang terkenal sebagai transistor jengkol.

Walaupun nampak sederhana, namun rangkaian ini sepertinya terdiri dari bagian:

  • Preamplifier Differensial,
  • Penguat Tegangan,
  • Servo Driver,
  • Over Current Protection (OCP),
  • Driver Amplifier, dan
  • Final Power Amplifier.

Preamplifier menggunakan transistor BC212 ( PNP, 350mW, -50VDC,-100mA ).

Fitur Diode Zener pada saluran basis transistor berfungsi untuk membatasi sinyal masuk agar jangan melebihi 3,9Vrms.

Di Power Amplifier lainnya fitur ini tidak banyak terpakai.

GAIN rangkaian tergantung dari hasil perbandingan nilai Resistor Feedback R11 terhadap resistor input R12.

Preamplifier tidak memiliki transistor sumber arus tetap namun memanfaatkan tegangan stabil dari Diode Zener D4 agar terjaga pada angka 15VDC.

Penguat Tegangan pada rangkaian ini ada pada T5 yang menggunakan MPSA42 ( NPN, 625mW, 300V, 500mA)

Servo Driver menggunakan transistor BC237 (NPN, 350mW, 50V, 100mA).

Fitur OCP menggunakan pasangan transistor BC237 / BC307 yang memiliki spek sama dengan Servo Driver.

Driver Power adalah pasangan TIP31C/ TIP32C (NPN/PNP, 40W, 100V, 3A)

Terakhir adalah transistor Final nomer 2N3773 (NPN, 150W, 140V, 16A).

Dengan mengetahui data dari transistor ini maka ini bisa kita jadikan modal untuk melakukan modifikasi rangkaian.

SKEMA GAMBAR ULANG POWER OCL QUASI 80W

Sebelum melakukan modifikasi, maka terlebih dahulu harus melakukan gambar ulang. Setelah itu baru mengubah komponen yang ada di dalam rangkaian.

Hasil perubahan harus kita amati pada mesin simulator untuk mengukur tegangan DC dan arus yang diperlukan pada saat testing menggunakan sinyal AC.

SIMULASI DC

Berikut ini adalah hasil pengukuran tegangan DC pada skema Power GC80 yang barusan telah gambar ulang.

Tegangan output pada terminal speaker adalah 27mV dan saya menganggap ini sudah mendekati sesuai.

Tegangan basis pada transistor Final juga menunjukkan angka normal. yaitu +0.44VDC dan -0.48VDC.

Demikian pula pada tegangan pada basis transistor OCP ( Q5 dan Q6) menunjukkan angka dibawah 0,5VDC. Ini telah sesuai.

MODFIKASI RANGKAIAN

Selanjutnya saya melakukan modifikasi rangkaian ini untuk bisa mencapai angka output 400W dengan jalan:

  • Menaikkan tegangan supply menjadi 65VDC sampai 70VDC.
  • Mengubah GAIN rangkaian
  • Transistor Differesial Preamp ganti dengan 2SA970
  • Penguat tegangan ganti ke Watt yang lebih besar
  • Resistor bias ke Driver Amplifier naikkan
  • Servo Driver ganti dengan VCe yang lebih tinggi
  • Transistor Driver ganti dengan pasangan TIP41C/TIP42C
  • Transistor Final ganti jenis MJL21194 sebanyak 3 set.

Hasil perubahan rangkaian menjadi seperti berikut ini:

Untuk setting DC-Offset, saya berikan tambahan trimpot untuk menyesuaikan tegangan output agar bisa mendekati 0,00mVDC pada saluran output.

R4 sebagai drop resistor nilainya tetap 4K7 namun daya resistor harus naik ke angka 2W.

R8 dan R9 berubah menjadi 4K7 masing-masing untuk membikin transistor VAS bekerja pada angka 7mA pada saat idle.

Untuk keamanan rangkaian, ada baiknya transistor Servo Driver ganti ke nomer MJE340.

Hasil simulasi dengan menggunakan sinyal sinus 1kHz level 1Vrms menghasilkan catatan sebagai berikut:

Kebutuhan arus untuk beban 4 Ohm adalah total 7,87Arms terbagi atas 3 transistor.

Jika hanya menyediakan 2 transistor maka masing-masing transistor akan menanggung arus 3,98A dan dissipasi transistor akan melebihi maksimal, yaitu 70V X 3,98A = 278Wrms.

Karena kemampuan dari MJL21194 adalah 200W, maka pada tegangan 70VDC setidaknya mengalirkan arus maksimum sebesar 2,85Adc.

Sementara itu arus yang mengalir pada transistor Driver adalah 400mA yang berarti transistor ini akan menghasilkan dissipasi daya hingga 70V X 0,4A = 28W.

LAYOUT PCB

Belum tersedia

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SKEMA AKHIR

Karena Q5 dan Q6 sulit kita dapatkan di toko penyedia komponen terdekat, maka saya putuskan untuk menggantikannya dengan pasangan nomer 2SC945/ 2SA733.

Berikut adalah schematic Diagram akhir dari Power modif dari LANEY GC80 yang telah berubah menjadi 70V 400W.

FINAL SCHEMATIC POWER OCL QUASI 80W LANEY GC80 MODIFIKASI 400W

Ada penambahan komponen pendukung Zobel Network pada terminal output untuk pencegahan sinyal liar Frekwensi Tinggi masuk ke speaker.

Schematic Diagram LANEY lainnya LIHAT SINI.

LANEY di blog saya lainnya ADA DI SINI.

OCL 120 WATTS LANEY EA120II

OCL 120 WATTS LANEY is a Guitar Power Amplifier with some feature such as Acoustic channels and Electro channels that you can choose one. For acoustic channels there are 6 Equalizer that can be used to evaluate the sound of your guitar.

INFO

See the pict HERE.

SCHEMATIC DIAGRAM POWER SECTION OF OCL 120 WATTS LANEY

This is an edited version of LANEY

OCL 120 WATTS LANEY

From the circuit above, its consists of some blocks:

  • Differential Preampifier,
  • Voltage Amplifier,
  • Servo Driver,
  • Over Current Protection,

At the input side, there is 3.9V Zener Diode available which is serves as an input signal limiter.

It also there is a 15VDC zener Diode as a voltage stabilizer for supply in this differential amplifier feed circuit.

GAIN of this circuit depends on the ratio of values between R11 and R12 or it’s about 100 times of gain.

The voltage amplifier T5 uses MPSA42.

The T6 servo driver uses BC 237 transistors where at the Base pin there is a 4K7 Trimpot which serves as a setting for idle current of the Final Power Transistors.

Its power amps also have the C5 elco booster capacitor which serves as positive feedback to mix in the voltage amplifier.

The OCP transistor here is uses BC237 paired with BC 307 (T7, T8).

This transistor has the task of if there is excess current in the R23 or R24, this will activate the T7 and T8 transistor bases to limit the signal to the power amplifier controller.

The amplifier driver here uses TIP31C and TIP32C pairs that have power capacities of up to 30 watts.

Finally, there are the T11 and T12 transistors that use TO-3 case, which is a quasi-pair that has a capacity of up to 150 watts.

NOTE FOR OCL 120 WATTS LANEY

By applying a voltage of 50 volts symmetrically, it is still possible for transistors to produce power up to 150 watts but at a load of 8 ohms.

When using a 4 ohm load, it is not recommended to do a full load for this amplifier because it is feared that overheating will occur when the signal is high level input.

Actually, you can modify this circuit by using another final transistor as long as it is a type of NPN.

For example, using a transistor 2sc 5200, even your voltage rises, there is no problem.

It’s just that you have to know the transistor calculation needed and how much supply voltage is needed too.

For example, this circuit is actually capable of up to 80 volts DC for supply, but you must have a final transistor of 5 or more pairs.

And the risk is that this power amplifier will output much more power but the current supply also requires more as well.

Final Power Transistor OCL 120 WATTS LANEY is using 2N3773 that can make power output up to 150 Watts (DATASHEETS). Below the transistor 2N3773:

SEE THE TRANSISTOR.

SEE ALSO

VARIOUS POWER AND Mixer Schematic Diagram inside this blog are LOOK HERE.

OCL 250 WATTS LANEY CP12

LANEY CP12 is an OCL 250 WATTS LANEY, an Amplifier Monitor made by LANEY that it is using symmetrical 52 VDC and MJ15003/MJ15004 TO-3 transistor as Final Power Amplifier.

In the brochure they said that its design for a 120 Watts Power Amplifier even though it uses 250 watts transistors.

INFORMATION ABOUT THE MONITOR

Inside a CP12 LOOK HERE.

From: Outback Electrical NZ

SCHEMATIC DIAGRAM OCL 250 WATTS LANEY POWER SECTION

The following is a schematic diagram of the Power amplifier section of the LANEY CP12 after editing:

OCL 250 WATTS LANEY CP12 SCHEMATIC DIAGRAM

From this circuit OCL 250 WATTS LANEY we can find out if it consists of several blocks, including:

  • Differential Preamplifier,
  • Voltage Amplifier Stages,
  • Servo Driver,
  • Over Current Protection,
  • Driver Amplifier, dan Lastly is
  • Final Power amplifier.

Final power transistor use MJ15003 / 04 and this is able to make 250 Watts audio Power output.

SEE ALSO

Another schematic Diagram Power Amplifier inside this blog please READ HERE.

VIDEO

Concept CP12 Repair by Outback Electrical NZ

OCL 300 WATTS LANEY

OCL 300 WATTS LANEY CK300 is a Power amplifier made by Laney era 2000s that uses the SAP15 transistor module as the Final Power Amplifier.

A symmetrical 60 Volt voltage and 2 pairs of Final transistors are possible to produce audio up to 300 Watts at a 4 Ohm load.

The CK 300 is a 4-channel microphone amplifier with a power amplifier inside. It’s like a 4-channel mixer with a power amplifier but in one package.

Need to know the unit? SEE THIS LINK.

SCHEMATIC DIAGRAM OF OCL 300 WATTS LANEY

This is the result of edited schematic diagram of LANEY’s CK300 Power Amplifier:

edited OCL 300 WATTS LANEY

This Amplifeir power circuit consists of several blocks:

  • Differential Preamplifier,
  • Voltage Amplifier Stages,
  • Over Current Protection,
  • Darlington Amplifier.

This amplifier has two trimpot for setting in DC-Ofset and Idle Current for the Final Power Transistor.

GAIN of the amplifier is depending on comparing value of R116 with R115.

Final Power Transistors use SAP15N SAP15P pairs, each of which has a power dissipation capability of up to 150 Watts (DATASHEETS).

SEE ALSO

Various Power Amplifier schematic diagram inside this blog please READ HERE.

OCL 80 WATTS LANEY CK80

I got OCL 80 WATTS LANEY CK80 when browsing the internet when searching for LANEY Keyboard Amplifiers.

And I think 80 Watts is enough to filling a little room or small venue when you show your musical skills or to entertain your audience.

But in this article, I just try to review the schematic diagram of this amplifier only.

INFO

SEE the AMPLIFIERS.

Its support 1 Microphone input and 2 of line inputs. For microphone input it has GAIN control also Two Pots of Tone Control.

CK80 only using a single Load-Speaker. It only 15″ and good enough to roar.

SCHEMATIC DIAGRAM OCL 80 WATTS LANEY CK80

The image below shows an edited schematic diagram of CK80 by LANEY:

OCL 80 WATTS LANEY CK80 SCHEMATIC DIAGRAM

The amplifier working in 50 Volts DC Symmetrical Supply Voltage. When the load is 8 Ohm, It’s possible to reaching 150 Watts or 250 watts at 4 Ohm load on output terminals.

This circuit does not have a trimpot for Dc-Offset but it has a trimpot for Servo Driver.

The Servo Driver here is on the TS1 transitor (BC237).

OCP transistor are TS7 and TS8. Its working as current limiter for final output transistor.

Any over current flow via resistor R49 and R50, the OCP will work as well.

This final power amplifier uses a quasi-technique, where the final transistor uses only one type. This circuit only uses NPN type transistors.

TIP35C transistor is a transistor with TO218 packaging that has a power dissipation capability of up to 125 Watts.

SEE ALSO

Another Audio Power Amplifier inside this blog LOOK HERE.

Blogspot of YOHAN AUDIO LINK HERE.

OCL 165 WATTS LANEY

I found OCL 165 WATTS LANEY from service manual of guitar amplifier CK165 series.

It uses a pair of Darlington Transistors and there is internal driver transistor and signal diode inside.

It uses 50 Volts symmetrical voltage to supply the circuit. And it also using Transistor SAP16 that is an audio purpuse to make audio output up to 160 watts at 4 Ohms load.

INFO OCL 165 WATTS LANEY CK165

LANEY CK165 is mini powered mixer. It has 4 channel inputs and it has Four potensio to control each channel.

It uses 15″ speaker for make bass frequency looks better.

You can find the price and info of this Amps by looking for JACOB MUSIC or YUSRUS.

SCHEMATIC DIAGRAM OF LANEY CK165

The picture below is an edited from the original schematic.

OCL 165 WATTS LANEY schematic diagram

The amps has a Trimpot at a Preamplifier Block to make the output always Zero VDC. It also called with DC-Ofset.

TS10 is a Voltage Amplifier Stages. Its amplify the input signal and make it bigger voltage.

The current through VCC 50V, R17, TS9, VR1, internal Diode of SAP transistors, and R2.

Over Current Protection here uses transistors TS3 and TS4 (MPSA42 and MPSA92).

When the output current passing through resistors R19 and R20 are exceeds 0.7 VDC then its OCP transistor will doing work as well and it will reduce the voltage supply to the Base transistor SAP16N/P so that this will reduce the output current to the load.

No Driver transistors needed. The SAP16 transistors already contains an internal transistor driver inside.

This OCL 165 WATTS LANEY power amplifier does not use a Servo Driver. It only utilizes the internal diode inside the SAP16P module and there is only the addition of a Timpot to limit the idle current in the Final Output.

SEE ALSO

Another Audio Power Amplifier inside this blog LOOK HERE.

Blogspot of YOHAN AUDIO LINK HERE.

OCL 250 WATTS LANEY

OCL 250 WATTS LANEY mean from an audio Amplifier especially for guitar or keyboard player brand LANEY BC250 series.

It uses two pairs of MJ150003/04 transistor and it mean that this power amps able to make audio output up to 500 Watts.

But its only be 250 Watts because the Power Supply of the Amps is only 50 Volts simmetrically.

INFO

Appearance of the amps is like LOOKS LIKE THIS.

Feature:

  • 5 channels graphic equalizer.

Power Supply for Power Amplifier need 50VDC simetrically.

How price? Check RAHMAN MUSIK

SCHEMATIC DIAGRAM OCL 250 WATTS LANEY

This is an edited schematic diagram of LANEY BC250 guitar Power Amplifier section:

OCL 250 WATTS LANEY schematic diagram

From this picture we can see if this power amplifier circuit consists of several block:

  • Differential Preamplifier with Current Mirror
  • Voltage Amplifier Stages,
  • Servo Driver,
  • Driver Amplifier, and lastly is
  • Final Power Amplifier

Available trimpot for DC offset setting

The GAIN of this circuit depends on the ratio the value of R16 to R15 or its 37 times.

Final Power amplifier using MJ15003/ 15004 that it can be 250 Watts output (DATASHEETS). This amps uses 2 pair of it.

By 50 Volts of symmetrical supply, its able to make 225 Watts at terminal output at 4 Ohm load.

SEE ALSO

Another Audio Power Amplifier inside this blog LOOK HERE.

Blogspot of YOHAN AUDIO LINK HERE.

Various Built Up Power and Mixer Schematic Diagram at YOHAN INDRAWIJAYA COM.

OCL 100 WATTS LANEY

OCL 100 Watts LANEY here is a LANEY 100SC made of 90s.

This guitar audio amplifier comes with a 100 Watt audio output with 2 channels. The first channel is for High GAIN Channel, and another one is for CLEAN Channel.

High Gain channel is usually for guitar amps that tend to loud music like ROCK and Metal and other hard genres. CLEAN channel can be used to amplify the sound of guitar genre such as Blues, Country, Ballads, Jazz and other melodics style.

Appearance of the unit you should LOOK HERE.

INFO OF LANEY 100SC

This is an information about LANEY 100SC from many sources:

World Series 100SC with Two Loadspeakers.

Using Final transistor BD909. Its TO-220 package and about 90 Watts of power dissipation (DATASHEETS)

The Chorus effect is using OPAMP NE571 as COMPANDORS.

You want to know the price? try visit THIS LINK

SCHEMATIC DIAGRAM POWER SECTION OF OCL 100 WATTS LANEY

This is the result of image edited of schematic diagram of LANEY 100SC:

OCL 100 WATTS LANEY schematic diagram

From the schematic above, it consists of some block:

  • Differential Preamplifier
  • Voltage Amplifier
  • Over Current Protection
  • Driver Amplifier, and lastly is
  • Final Quasi Power Amplifier.

TR1 and TR2 work as Differential Preamplifier. The circuit GAIN value is R6/R10 or 31x. Voltage source is 15VDC from D3 as Voltage Stabillizer.

TR3 (MPSA05) is Voltage Amplifier. C4 are capacitor boostrap for positive feedback signal.

This circuit no need servo driver. Its only using diode D5 and D6 to rectifying the audio signal to driver transistor TR6.

Tr4 and TR5 work as OCP. Its will be shortening signal to ground if there are over current flowing through power resistor R18 and R19.

OCL 100 WATTS LANEY using transistor BD909 in Quasi connection as Final Power transistors.

SEE ALSO

Another Audio Power Amplifier inside this blog LOOK HERE.

Blogspot of YOHAN AUDIO LINK HERE.

DATASHEETS

BD909 By SGS THOMSON

SA571 NE571 by PHILIPS SEMICONDUCTORS