LM datasheet, LM circuit, LM data sheet: NSC – LM/LMA Low Noise Dual Preamplifier,alldatasheet, datasheet, Datasheet search site for. LM/LMA Low Noise Dual Preamplifier. General Description. Features. The LM is a dual preamplifier for the amplification of low level signals in. Cross-Ref. LM Product Folder. Low Noise Dual Preamplifier [Discontinued]. General. Description. Features. Datasheet. Obsolete. Parts. Datasheet. PDF.

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Viewed products Phono preamplifier circuit We present you a retro assembly. Conditions of use Llm387 policy. Phono preamplifier circuit Reference: We present you a retro assembly.

This circuit was absolutely necessary years ago for us to listen lm87 our vinyl discs. We all know what a preamplifier is, but what about R. This association proposed certain corrections to be made at the time of recording and reproducing vinyl discs so that their sound quality could be better.


This correction soon became a standard.

LM387 PDF Datasheet浏览和下载

Therefore, all turntables had to be made according to this correction. We suddenly had this idea since we wanted to listen to our vinyl discs from last year.

So, we rolled up our sleeves and this is the result. The circuit is integrated in the interior part of the turntable, and we have used its power source to empower our circuit, which consumes merely 20mA. An electronic scheme is quite simple; it consists of an integrated circuit and some other components.

Lm387/lm387a Low Noise Dual Preamplifier – National Semiconductor

The integrated circuit can be a NE or a LM, each of them will do, they are double operational low volume amplifiers. The only requirement is that they are empowered with 15 volts. This filter is nothing more than a curve on the following graphic.

That is to say, our filter the R. A correction actually amplifies deep frequencies and tones down the high-pitched ones.

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LM Datasheet PDF – National ->Texas Instruments

A photo of the assembly of our previous stereo R. As you can see in the photo, we made a ground plane on our printed circuit board, that is, we covered datasjeet negative pole with a large quantity of copper on both sides.

Doing this, you can manage a better shield against the buzzing. In this assembly, when we are at the printed circuit board vision, just by pressing the icon a ground plane will be lm37.

Both LM and NE can be used without problems, with a 15 volt power. Datasheer scheme and the circuit board should be in the same folder and they should have the same name, you should only change the extension to.

The file is compressed, to extract it, you should enter a password: Phono preamplifier circuit Download