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Old 22nd October 2010, 10:36 AM   #1
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Exclamation Ceramic Pickup Preamp Schematic needed

I have an old philips record player with CERAMIC PICKUP. Can any one suggest any good sounding preamp for that? That can be made with transistor or IC, not an issue. Output needed 2V p to p
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Old 22nd October 2010, 12:21 PM   #2
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If I remember correctly the output from these is so high that a preamp is not required. You should be careful before using it on any valuable vinyl as it may damage it. Inspect the stylus with a magnifier, test anyway on something unimportant.

w

You can easily construct an amp with a few dB of gain using an opamp, say an NE5532 (cheap).

Last edited by wakibaki; 22nd October 2010 at 12:24 PM.
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Old 22nd October 2010, 12:59 PM   #3
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Ceramic pickups vary in output, generally the better quality have lower output. From memory the typical output is a few 100mV, so you probably need a gain of 10-20 to get your required 2V. However, some ceramics will generate volts, as wakibaki says, so you might just need a follower as a buffer. They need a high impedance input, say 1M. Too low an impedance loses bass, as the pickup looks like a capacitance in series with a voltage generator.

I would use a cheap JFET input opamp, such as TL071 or LF351 series, in the non-inverting configuration. This means that the 1M input would not create much offset, as it might with a bipolar input amp, because a JFET input has virtually no bias current. Adjust the feedback resistors to get the gain you need.
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Old 22nd October 2010, 02:26 PM   #5
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Thanks to everyone. Elvee the last link "Transistor tutorial Audio Amplifiers, Part 5" I liked much.

Thanks again
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Old 6th April 2012, 08:26 AM   #6
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Thumbs up Preamplifier for ceramic pickup

Hi,
Here good schematic for ceramic pickup.
Cheers!
Attached Images
File Type: jpg preamp for ceramic pickup.jpg (216.2 KB, 98 views)

Last edited by formula 22; 6th April 2012 at 08:38 AM.
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Old 6th April 2012, 08:33 AM   #7
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Quote:
Originally Posted by formula 22 View Post
Hi,
Here good schematic for ceramic pickup.
Cheers!

Can I replace the IC with LF 353 or LM 324?
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Old 6th April 2012, 08:46 AM   #8
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Quote:
Originally Posted by diptangshu View Post
Can I replace the IC with LF 353 or LM 324?
Yes with LF353.
This is a better schematics which can be changed a gain with trimmer of 10k or 100k !
Cheers!
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File Type: jpg preamp for ceramic pickup.jpg (223.6 KB, 83 views)

Last edited by formula 22; 6th April 2012 at 09:06 AM.
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Old 6th April 2012, 09:48 AM   #9
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Hi,
This is a better schematics which can be changed a gain with trimmer of 10k or (1....470k).
This schematic is for the stereo to mono use OA: NE5534, LF351, TL071, OP123, etc., while attention should be paid to the pins OA?
Input resistance changes with the input resistor connected to ground (1MOhm)
To enter this violin pickup resistor should be about 4,7 MOhm!
Best regards!

Last edited by formula 22; 6th April 2012 at 09:51 AM.
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