preamp opamps

sparky68 · 9th November 2010, 04:48 PM

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

sparky68 · 9th November 2010, 05:24 PM

pic if it helps

Mark

PhaseLockLoopy · 9th November 2010, 06:02 PM

If same pin config as NE5532 (Signetics) check out Raytheon's RC4227 -- boy is the noise floor far away

sparky68 · 9th November 2010, 06:07 PM

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

moschfet · 9th November 2010, 06:25 PM

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.

sparky68 · 9th November 2010, 06:45 PM

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

PhaseLockLoopy · 08:00 PM

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

Leon08 · 9th November 2010, 08:04 PM

It's really interesting how much this piece of **** costs.My DIY preamp is ways.. better then this garbage.

sparky68 · 9th November 2010, 08:11 PM

out of interest Leon how much does it cost as it was given to me

Xoc1 · 9th November 2010, 08:19 PM

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.

9th November 2010, 04:48 PM	#1
sparky68 diyAudio Member Join Date: Jun 2009	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

9th November 2010, 06:02 PM	#3
PhaseLockLoopy diyAudio Member Join Date: May 2008 Location: On a mushroom	If same pin config as NE5532 (Signetics) check out Raytheon's RC4227 -- boy is the noise floor far away __________________ Hum likes to have a nice "Noise to Signal" ratio To "Hum" is to be noticed Quality hum is when it pours out of Electrostatic speakers

9th November 2010, 07:43 PM	#7
PhaseLockLoopy diyAudio Member Join Date: May 2008 Location: On a mushroom	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 __________________ Hum likes to have a nice "Noise to Signal" ratio To "Hum" is to be noticed Quality hum is when it pours out of Electrostatic speakers Last edited by PhaseLockLoopy; 9th November 2010 at 08:00 PM.

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9th November 2010, 05:24 PM	#2
sparky68 diyAudio Member Join Date: Jun 2009	pic if it helps Mark

9th November 2010, 06:07 PM	#4
sparky68 diyAudio Member Join Date: Jun 2009	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

9th November 2010, 06:25 PM	#5
moschfet diyAudio Member Join Date: Jul 2008 Location: Hannover	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.

9th November 2010, 06:45 PM	#6
sparky68 diyAudio Member Join Date: Jun 2009	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

9th November 2010, 08:04 PM	#8
Leon08 Banned Join Date: Sep 2010 Location: at Home	It's really interesting how much this piece of **** costs.My DIY preamp is ways.. better then this garbage.

9th November 2010, 08:11 PM	#9
sparky68 diyAudio Member Join Date: Jun 2009	out of interest Leon how much does it cost as it was given to me

9th November 2010, 08:19 PM	#10
Xoc1 diyAudio Member Join Date: Nov 2008 Location: Devon UK	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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