Thursday, June 13, 2019

Operational Amplifier, Types of Op Amp ICs and Characters

Various types and advantages of each offered by each component manufacturer to captivate the hearts of audio lovers. This is often done by audio hobbyists. Fiddling with and experimenting mutually components to get the best sound possible.

In the market, there are many choices of components, from the cheap to very expensive. The endpoint is a personal taste that determines the choice. Unfortunately, more and more standard components have decreased in quality. Instead of improving but getting worse. Finding quality components is difficult and expensive.
Op Amp IC NE5532  LM833 TL072 LF353 CA3140 CA3240 OPA2134 LM324 AD823 JRC4558 4558

Prioritize replacing active components that directly process audio signals such as ICs and transistors. Because the upgrade effect is likely to sound more real. After that, it is just a passive component that does not directly process signals such as power supply, tin, resistor, condensator, transformer, and others. The effect on sound repairs is very small or even the difference is not heard directly.
Do not let you get stuck to replace passive components with prices that are so expensive while the main IC that processes electronic signals is ignored. Don't also get caught up in suggestions. The easiest upgrade is to replace the IC op-amp in the preamp. Because just pull the IC from the socket and install a new IC. Sometimes it needs to be accompanied by changing a few components such as a resistor to adjust a new IC with an existing system.
Dual Op-Amp

Not all op-amps have super specifications such as very high slew rates, very wide bandwidth, very low noise, very low THD, and others sound good. For the record, only 2-3V / µs slew rate is needed for the op-amp so that it can cover all sound frequencies.
It's just that because the sound power is mainly music that is different, it takes at least 3 times the standard.

After all, replacing the standard op-amps like 741, 4558 and LM324 with the better ones, even the "super" ones, actually made a messy sound. Because this type of op-amp requires a special power supply and can be very unstable. For example, a good standard op-amp like NE5532 requires a decoupled supply (usually ceramic or mica) of no more than 2 inches (a super op-amp is a closer). Unlike 4558 which can run quite smoothly without decoupled. So if you want to replace the IC, you should first look at the PCB design, don't just replace it. Here are some IC op-amps quoted from several sources.

LM833 (dual) = Flat with a pretty good musical dynamics.
4558D (dual) = good but boomy bass, vocals hoarse, treble blunt.
NE5532 (dual) = Flat with good vocals on the ears and clear treble. Details are very good, but for some people, the bass feels less.
TL072 (dual) = Quite noisy, but with good dynamics.
LF353 (dual) = A lot of sound at the middle frequency, but quite natural and detailed. Treble and bass feel soft.
CA3140 (single) = Special amps with MOSFET input. Vocal and treble sounds are pretty good in the ears. Unfortunately, the dual version (CA3240) is only produced for the industrial and military circles.
LM324 (quad) = Noise is quite audible. Poor detail and blunt treble.
OPA2134 (dual) = the favorite op-amp for audiophiles with excellent staging and depth of music, but with less detail and musical dynamics.
AD823 (dual) = Very detailed and very natural, great dynamics, with very clear bass and treble.

And some other types of op-amp ic that you can try with the advantages and disadvantages.
CA3080 = Dual Transconductance (LM3080). (8 pins)
CA3130T = Single op-amp MOSFET uncompensated. (8 pin)
CA3130E = Single op-amp MOSFET/bipolar/compensated. (8 pin)
CA3140E = MOSFET LM741 pin compatible. (8 pin)
CA3160E = Single op-amp. (8 pin)
CA3240E-1 = Dual op-amp. (14 pin)
CA5130E = Single op-amp. (8 pin)
CA5160E = Single op-amp. (8 pin)
ICL7611D = Single low-power op-amp. (8 pin)
ICL7641E = Quad low-power op-amp. (14 pin)
ICL7642E = Quad low-power op-amp. (14 pin)
ICL7650S = Chopper stabilised op-amp. (14 pin)
ICL7652C = Chopper stabilised op-amp. (14 pin)
LF347N = Quad high-performance op-amp. (14 pin)
LF351N = Single high-performance op-amp. (8 pin)
LF353N = Dual high-performance op-amp. (8 pin)
LF355N = Single high-performance op-amp. (8 pin)
LM10CLN = Dual Low-voltage compensated with reference. (8 pin)
LM301N = Single general-purpose op-amp. (8 pin)
LM301AN = General purpose uncompensated. (8 pin)
LM308N = Single low-drift op-amp. (8 pin)
LM324N = Quad low-power compensated. (8 pin)
LM358N = Dual low-power compensated. (8 pin)
LM614 = Quad Operational Amplifier and Adjustable Reference. (16 pin)
LM741 = Single General purpose uncompensated. ( 8 pin)
LM833N = Dual low-noise Hi-Fi Audio compensated. (8 pin)
LM1360N = Dual transconductance. (16 pin)
LM1458N = Dual general-purpose compensated. (8 pin)
LM3900N = Norton Quad Current Differencing. (14 pin)
LM627CN = Precision low-noise. (8 pin)
NE531N = Single high-performance. (8 pin) 
NE5532 = Dual low-noise. (8 pin)
NE5534P = Single Low-noise high-output. (8 pin)
NE5539 = Single wide-band. (14 pin)
OP27 = Low-noise precision (8 pin)
RC4558P = Dual high-performance. (8 pin)
TL061CP = Single low-power. (8 pin)
TL062CP = Dual low-power. (8 pin)
TL064CN = Quad low-power. (14 pin)
TL071CP = Single low-noise. (8 pin)
TL072CP = Dual low-noise. (8 pin)
TL074CN = Quad low-noise. (14 pin)
TL081CP = Single high-performance. (8 pin)
TL082CP = Dual high-performance. (8 pin)
TL084CN = Quad high-performance. (14 pin)
TLC251 = Low-voltage Power CMOS. (8 pin)
UA4136 = GP low-noise. (14 pin)
741 = Single General purpose uncompensated. (8 pin)
741S = Single High-speed. (8 pin)
747 = Dual general-purpose. (8 pin)
748 = Single general-purpose. (8 pin)
LM759 = Power op-amp. (4 pin) 

Of all the ic above there are some that have the same pinout. There are also a few different ones. So please check the datasheet before you install it. So that the IC op-amp can work according to its function. Maybe some of them are rare and difficult to get. You can search for other types of IC that have the same character.

Wednesday, June 12, 2019

Power Amplifier APEX BA1200 PCB Layout PDF

Hello friends Elcircuit, this time I will share a PCB layout design for power amplifier BA1200 APEX, this is a driver PCB power amp, you must add the final transistor for this amplifier. The output power is quite large if it is supported by an adequate power supply and final transistor. To use a power supply you can use 45VDC - 90VDC. In addition, you can use the Toshiba 2SC5200 / 2SA1943 final transistor with 14 sets. The power produced can reach 1500W. And this amplifier is very suitable for bass amplifiers or for the use of subwoofer speakers.

Following is PCB Layout from APEX BA1200, to make it easier to make PCBs I provide files in PDF format that you can download at the end of the post.

Power Amplifier APEX BA1200 PCB Layout PDF


Monday, June 03, 2019

Class-D Amplifier Yamaha YDA138

Hello friends, on this occasion I will share the power amplifier scheme using the Yamaha YDA-138 class D power amplifier chip and also class AB amplifier headphones which are included in the YDA138 chip.
The following is the YDA138 Class-D Yamaha Amplifier power amplifier schematic:
Yamaha YDA138 Class-D Amplifier Schematic Diagram circuit diagram
This amplifier is very suitable for use in the room, using 6-8 inch speakers, the power that can be produced by this amplifier is around 10W RMS at 4-ohm load. And the above scheme is specifically for the use of 4-ohm speakers because in the LPF section it uses 470N with a 10uH inductor. For more details, you can also see the IC YDA 133 datasheet.

Because I want to make an amplifier with good sound quality, I use an audio grade component. Check out the video making for this amplifier.

In the video, I use a power supply with a battery so that it can be made portable for its D-class amplifiers and for its headphone headphones. My battery uses 3 18650 with a 4.2V 3Ah voltage each so it can produce 12.6V voltage, and I give BMS (Battery Management System) to make it safer. For charging can use a voltage of 13.8V, these amplifiers can run up to 24 hours nonstop using a 4 ohm 6-inch speaker. in full load, this amplifier only consumes no more than 3W.

If you are interested in making this amplifier, I provide Gerber files to download, and you can order PCBs at the PCB manufacturing plant.

The following PCB Layout Class-D Amplifier Yamaha YDA138 

Class-D Amplifier Yamaha YDA138

Class-D Amplifier Yamaha YDA138 PCB
Class-D Amplifier Yamaha YDA138 Layout PCB
PCB Class-D Amplifier Yamaha YDA138 Gerber

Saturday, May 18, 2019

Power Amplifier SOCL506 Driver PCB Layout

This SOCL 506 power amplifier has been tested to be very reliable to be used as a field sound system or also a power amplifier that is intended for the room because its character is flat at all frequencies and is very easy to set.

This SOCL 506 power amplifier has a very good performance and also has decent power to compensate for some sound systems with high prices, it can be several times, this can save you budget for DIY'ers who want to have a reliable power but it's quite affordable, you can make the Amplifier SOCL 506 PCB Layout. In the picture below, the PCB has also been provided in the form of a PDF file so that friends can directly print it according to size.

Power Amplifier SOCL506 Driver PCB Layout
This Power Amplifier circuit can be supplied with a symmetrical voltage up to 90VDC, and can be added to the final transistor in order to control large power up to 1200W RMS. You can use a final transistor such as Toshiba 2SC5200 / 2SA1943 or NJW, or another with a large transistor.

Power Amplifier SOCL506 Driver PCB Layout 

See also
Super OCL Amplifier 500W RMS

Marshal V.120PA Power Amplifier PCB Layout

Hello Electronic DIY'ers, on this occasion I will share a PCB Layout file for Marshal V.120PA power amplifier. Where this power amplifier circuit is very suitable for guitar amplifiers, the power output can reach 100W with an adequate power supply, you can use a symmetrical power supply, ranging from a voltage of 25VDC-45VDC, a minimum of 5 amps
Let's just take a look at the PCB Layout image for the top and bottom. And for PDF files you can download at the end of the post.
Marshal V.120PA Power Amplifier PCB Layout Guitar Amplifier
Top Silkscreen

Marshal V.120PA Power Amplifier PCB Layout Guitar Amplifier
Bottom Copper


Sunday, May 12, 2019


Hello DIY'ers,  I will share the schematic and PCB layout for Fullbridge with PFC (Power Factor Correction) Switching Mode Power Supply. I will not explain in more detail this SMPS, you can immediately try this SMPS with PCB Layout below. This SMPS can be supplied with varying input voltages, ie between AC voltages between 90 - 265V, SMPS is still able to provide a stable output voltage. But also need to be considered the components used must be good, and the transformer must be in accordance with a calculation such as a schematic, how to roll the transformer must also be good and tight. Symmetrical 90V DC output voltage.

Schematic SMPS Fullbridge PFC 4kVA:

PCB Layout SMPS Fullbridge PFC, you can download PDF files at the end of the post.

Saturday, May 11, 2019

PCB Layout Super Gainclone Amplifier LM3886

Hello DiY'ers, at this time I will share PCB Layout design in Gerber file for Power Amplifier circuit LM3886, this is Super Gainclone Amplifier LM3886 and PCB is very simple and mini design, like a pin to pin soldering. So it's very good PCB design for you LM3886 Gainclone amp.
PCB Layout Super Gainclone Amplifier LM3886

PCB Layout Super Gainclone Amplifier LM3886

PCB Layout tested:
Gerber File PCB Layout Super Gainclone Amplifier LM3886

Tuesday, May 07, 2019

Power Amplifier APEX FX100 PCB

APEX Power Amplifier This FX100 power amplifier has been tested and is very good among audio amplifier lovers. I will share a little about this power amplifier precisely for the manufacture of traditional PCBs, usually using transfer paper to transfer the layout to the PCB. The following is a picture of the APEX FX100 layout:
Power Amplifier APEX FX100 PCB
PCB Dimension 80.5x84mm

You can download the PDF file at the link below:
PCB Layout Apex FX100 PDF

Monday, May 06, 2019

LM1875 Power Amplifier Rounded PCB design gerber file

LM1875 Power Amplifier Rounded PCB design gerber file
This time I will share Gerber file and schematic for LM1875 HiFi Gainclone chip amplifier, this power amplifier is a new design with Rounded PCB. you can download the Gerber file at the end of the post. This schematic can be using 25VDC up to 40VDC symmetrical power supply with current 3-5A. It can produce high-quality sound, you can check the video also in this post.

LM1875 Power Amplifier Rounded PCB schematic

Video assembling and tested amplifier:

Gerber File LM1875
Gerber File Volume control simple

Thursday, May 02, 2019

1000W Power Amplifier Class H Kencleng Pro

1000W Power Amplifier Class H Kencleng Pro, This is a power amplifier with class H topology, see more about what class H amplifier is here:
And this time I will share Gerber files for this class H amplifier, this power amplifier is very powerful, very suitable for use in the field. With a maximum power of up to 1000W on a 4 Ohm load, amplifiers are indeed intended for large sound systems. Besides having a large enough power this amplifier also has good sound quality, can be used for woofers, subwoofers or midrange speakers. The recommended power supply for MV is 70V and HV 140V DC, with a minimum current of 20A.

The following is a Gerber file viewer image, with a double side layout. You can download the Gerber file at the end of the post.
1000W Power Amplifier Class H Kencleng Pro
Gerber 1000W Power Amplifier Class H Kencleng Pro