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Old 3rd January 2009, 04:16 AM   #1
limono is offline limono  United States
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Default Exposure 2010 phono board OPamp?

Anybody knows what Opamp sits in this phono board ? I've got the board years ago ,burned out Opamps unsoldered them put the board on the shelf and now I forgot what the heck was there I think it was NE XXX but can;t swear on it? Anybody got info or even schematic?
TIA, L
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Old 3rd January 2009, 06:31 AM   #2
tubenut is offline tubenut  South Africa
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Probably 5532 (single) or 5534 (dual). Trace the circuit to see. Otherwise, power it up without opamps and check on which pins you find the PSU + and - voltage, this will tell you dual or single as the pin outs differ.

Good luck
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Old 3rd January 2009, 08:29 AM   #3
mjf is offline mjf  Austria
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Default ne5532

hallo!
when top view: 5532 is the dual version(pin 8 =v+,pin7=output).5534 is single(pin 7 =v+,pin6=out).
regards...........
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Old 3rd January 2009, 09:17 AM   #4
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Single opamps => 2010
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File Type: jpg 2010sphono.jpg (35.1 KB, 207 views)
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Old 3rd January 2009, 11:48 PM   #5
limono is offline limono  United States
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Thank you Gents!
Its a single NE5534AN per channel (for MM version) .The Board looks very simple .Opamp is coupled with 0.33uF to output. I'm not sure Opamp change would bring any improvement .I'm going to build some decent PSU and make it stand alone unit.
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Old 4th January 2009, 05:16 AM   #6
tubenut is offline tubenut  South Africa
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Quote:
Originally posted by limono
Thank you Gents!
Its a single NE5534AN per channel (for MM version) .The Board looks very simple .Opamp is coupled with 0.33uF to output. I'm not sure Opamp change would bring any improvement .
Ypu may be surprised though one must be careful in what op amp to select. If the whole stage is one op amp per channnel it will need to be unity gain stable for eg.

I quite like LT1468 in phono for eg. A more dynamic sound then NE but not as dry a sound as the AD chips for eg. Not lush like BB.
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Old 4th January 2009, 03:34 PM   #7
mjf is offline mjf  Austria
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Default ne5534

hallo.
the lt1028 (linear technology) could be annother choice.
greetings.....
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