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ClearAudio Basic+ Phono Stage "Riaa"
ClearAudio Basic+ Phono Stage "Riaa"
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Old 10th March 2016, 08:13 PM   #1
McJan is offline McJan  Denmark
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Default ClearAudio Basic+ Phono Stage "Riaa"

Hi every one...

Is there som one that can help with a service manual on a ClearAudio Basic+ ? or tell the model of OP-AMP in the unit

Thanks in advance

Jan Christensen
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Old 10th March 2016, 08:20 PM   #2
Mooly is offline Mooly  United Kingdom
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ClearAudio Basic+ Phono Stage "Riaa"
Welcome to diyAudio Jan

If its an RIAA preamp then you are probably best posting the question over in the Analogue Line Level forum. This is for intros really.

If an opamp is an unknown then you can make a guess by checking the power supplies which will be on pins 4 and 7 for a single and pins 4 and 8 for dual opamp. RIAA stages probably use a low noise bipolar rather than FET device. Typically this would be an NE5532 which was the industry standard.
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Old 10th March 2016, 08:56 PM   #3
McJan is offline McJan  Denmark
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Default Clearaudio Basic+ OP-AMP

Hi every one...

Is there som one that can help with a service manual on a ClearAudio Basic+ ? or tell the model of OP-AMP in the unit

Thanks in advance

Jan Christensen
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Old 10th March 2016, 09:54 PM   #4
rayma is offline rayma  United States
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Quote:
Originally Posted by McJan View Post
help with a service manual on a ClearAudio Basic+ ? or tell the model of OP-AMP in the unit.
They remove the markings, so probably that information isn't available.
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Old 10th March 2016, 10:03 PM   #5
McJan is offline McJan  Denmark
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Yes i know..... But mabye some one know it or got the service manual of this unit.
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Old 13th March 2016, 01:41 AM   #6
kevinkr is offline kevinkr  United States
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ClearAudio Basic+ Phono Stage "Riaa"
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Old 13th March 2016, 03:44 AM   #7
rayma is offline rayma  United States
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Originally Posted by McJan View Post
Yes i know..... But mabye some one know it or got the service manual of this unit.
If they remove the op amp markings, there is probably no service manual.
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Old 13th March 2016, 12:03 PM   #8
tomatamot is offline tomatamot  Netherlands
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Why d`nt ask Clearaudio?

Sent an email to: info@clearaudio.de and explain what you need to know.
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Old 14th March 2016, 07:49 PM   #9
Wirehead_be is offline Wirehead_be  Belgium
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Just take a clear picture of top + bottom of the pcb. 99% of the time it's either a single dual op-amp with the RIAA in the feedback loop, or two dual op-amps with passive RIAA.
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Old 14th March 2016, 08:00 PM   #10
McJan is offline McJan  Denmark
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It is a dual. But I try with many other opamp but all getting very warm and burn the resistor "10R 1/4W" in the power in on the PCB
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