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Old 9th November 2010, 04:48 PM   #1
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Default preamp opamps

hi
while im in the mood for updating the old Musical Fidelity stuff i have opened the preamp 8 and it has 4 opamps i think thats what they are ? ZVN4206E 's
what is a better opamp to upgrade this with if any

Thanks very much

Mark
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Old 9th November 2010, 05:24 PM   #2
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pic if it helps

Click the image to open in full size.

Mark
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Old 9th November 2010, 06:02 PM   #3
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If same pin config as NE5532 (Signetics) check out Raytheon's RC4227 -- boy is the noise floor far away
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Old 9th November 2010, 06:07 PM   #4
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cheers Phase
these are 14 pin type ? ive uploaded a pic but have to wait for a mod to publish as i haven't enough posts i believe ?

Mark
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Old 9th November 2010, 06:25 PM   #5
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Hi sparky,

the ZVN4206E is not a opamp. This is a mosfet-transistorarray.

Your preamp is more a diskret-circuit and you can not change the ZVN4206E for a opamp.
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Old 9th November 2010, 06:45 PM   #6
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ok thankyou moschet appreciate that
so not a lot i can do to improve the pre then ?
its not that its not good already to be honest just a thought thats all.
Regards
Mark
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Old 9th November 2010, 07:43 PM   #7
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That's a nice looking pre-amp, Sparks -- Just as an aside - I love doing pre-amps using all small signal transistor discretes, like Naim -Krell - Levinson etc -
it's ages since I used preamp packages
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Last edited by PhaseLockLoopy; 9th November 2010 at 08:00 PM.
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Old 9th November 2010, 08:04 PM   #8
Leon08 is offline Leon08  Germany
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It's really interesting how much this piece of **** costs.My DIY preamp is ways.. better then this garbage.
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Old 9th November 2010, 08:11 PM   #9
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out of interest Leon how much does it cost as it was given to me
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Old 9th November 2010, 08:19 PM   #10
Xoc1 is online now Xoc1  United Kingdom
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If you feel like giving this a bit of a lift maybe you should try recapping the preamp with high quality capacitors such as Elna simics and/or Panasonic FC.
Best electrolytic capacitors
You could also look at the PSU circuit and regulators.
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