build Hi-Fi Amplifier with lme49830

[javadnadimi026]

Hello

2sc5200 & 2sa1943 is newest toshiba audio transistor
lme49830 is ultra high fidelity amplifier driver

because , i want build a high-end , Hi-Fi amplifier with these components

please help me to build this , thank very much

excuse me for bad english

 

[jacques antoine]

The LME49830 is designed to drive mosfets. To drive bipolars such as the '5200 and '1943, the LME49810 would be a better choice.
Cheers,

Jacques

 

[tomchr]

Have a look at my Yet Another LME49811 + STD03 build.

~Tom

 

[javadnadimi026]

Thank friends

Is the 49810(or 49811) better than 49830 for bipolar? (because LME49830 is Ultra High Fidelity) but 49810( or 49811 ) .... ? please help me to decide .
can not i use 49830 for bipolar ?

what is better?
LME49810 + 2sc5200-2sa1943
LME49811 + 2sc5200-2sa1943
LME49830 + MOSFET?

and what the best choose MOSFET for LME49830 ?

Thank again very much .
excuse me for bad English.

 

[tomchr]

The LME49810 is a high-power version of the LME49811. They are both designed for use with bipolar devices.

The LME49830 is designed for use with MOSFETs. I suspect most of the chip is identical to the LME49810 or LME49811, but the circuit that biases the output stage is different. They are all high fidelity input stages with good specs.

If you are looking for an amp in the 100 W range (8 Ω) I'd suggest the LME49811 plus a pair (or two) of bipolar output transistors.

~Tom

 

[Mihkus]

For mosfets less devices are needed because MOSFETs have very low gate-drain current to be fully switched when BTJs have it fairly high and need driverstage.
That design: http://www.diyaudio.com/forums/solid-state/235071-lme49830-project-boards.html

Is ultra simple.

 

[javadnadimi026]

ok
thank

what is better?

LME49810 VS LME49830 ?

 

[javadnadimi026]

LME49830 + Mosfet
or
LME49810 + bipolar(2SC5200+2SA1943)

 

[palstanturhin]

Depends what you mean by "better"?
Easy to make, and adjust?
Low prize?
Low current consumption?
What?

Sound quality (measured test results) will be excellent (and quite similar) in both, and probably will depend more on your choise of other components (+PSU) and your PCB than on the chip and the OPS...

 

[javadnadimi026]

best sound quality and fidelity !

with high current regulated power supply , high end capacitors (example ELNA Silmic II) and good designed PCB

what is better quality and fidelity

and a question ..
What is best choose MOSFET transistor for LME49830?
for very high fidelity and quality.

thanks very much for answer and help.
excuse me for bad English.

 

[palstanturhin]

I like Toshiba mosfets.
I like LME49811.

But with an exceptionally excellent setup of LME49830 and a pair of some super high quality driver transistors + IRFP240/9240, might be interesting to check out...
Prepare for a massive power consumption though...

But then again; with an "exceptionally excellent setup" of just about anything will be exceptionally excellent...

The weakest link in your setup will not be the LME-chip nor will it be the output stage transistors - its all the rest.

 

[tomchr]

It's like any other amplifier. If it doesn't become a ground management and power supply design, you're not doing it right.

I suggest reading some of the LME498xx build threads. You'll be able to find some gold nuggets there about the layout.

~Tom

 

[javadnadimi026]

thanks

 

[kkchunghk]

Sanken MOSFET

Hi,
I am building a MOSFET output stage for LME49830. The Sanken MOSFET pair MLE20/MJD20 has a following in Japan and China. Has any fellow member used them before? VDSS=150V, ID=20A.

 

[Albrerta]

any thoughts about this module? looks like a good one

AMP67 - APTaudio Product