4570C and 5218A

Mr. Triatic · 23rd January 2004, 08:03 PM

hi guys (and gals)!
i have scanned the net for information/specs. on these devices (opamps) ...but nothing, does anyone have any clue regarding the specs.?
those little fellows are encapsulated in 8 pin DIP package.
Are they dual opamps or just single ones?

any HELP would be appreciated
kind regards
/Ludvig.

Tube_Dude · 23rd January 2004, 08:19 PM

Hi Ludvig!

They are dual op amp and bipolars...i never find nothing about them in the net.
They are very much used by the majors japonese manufacturers.(Pioneer , Onkyo,etc) in the phono input stage!

Is not much , but is all i know!!

Mr. Triatic · 23rd January 2004, 08:28 PM

wonderful!
then i probably can replace them with a dual OPA2134...?!
the victim is a Denon DA-500 DAC, i ripped off the cover and spotted those opamps...

Cheers mate, thanks for the quick reply!
/Ludvig.

EIRA · 16th February 2005, 11:30 PM

Hi Ludwig... I planned to change these M5218 as well. Did you do it (back then in 2002)? and did it work out satisfactory?

Leolabs · 17th February 2005, 10:34 AM

If i was not wrong,datasheets of both are available at www.datasheetarchive.com.Personally for replacement of them,i will try any dual audio OP-AMP as long as pins compatibility is not an issue.

macboy · 17th February 2005, 01:05 PM

You'll have more luck searching for M5218 (with A, AF, or AFP suffixes) and NJM4570 or JRC4570.

EIRA · 19th February 2005, 07:08 AM

I found the datasheet here: http://www.datasheetarchive.com/sear...218&sType=part
I changed the 5218 (slew rate 3 V/us) by and OPA2134 (slew rate 20 V/us) and put two larger capacitors in the power supply. A great improvement. more power in a shorte base, more open sound, more solid, softer mid. Absolute worthewile the 10 Euro's I paid for the 2134!

23rd January 2004, 08:03 PM	#1
Mr. Triatic diyAudio Member Join Date: Feb 2002 Location: SWE EU	4570C and 5218A hi guys (and gals)! i have scanned the net for information/specs. on these devices (opamps) ...but nothing, does anyone have any clue regarding the specs.? those little fellows are encapsulated in 8 pin DIP package. Are they dual opamps or just single ones? any HELP would be appreciated kind regards /Ludvig. __________________ www.joddla.net/audio/

23rd January 2004, 08:19 PM	#2
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	Hi Ludvig! They are dual op amp and bipolars...i never find nothing about them in the net. They are very much used by the majors japonese manufacturers.(Pioneer , Onkyo,etc) in the phono input stage! Is not much , but is all i know!! __________________ Jorge

23rd January 2004, 08:28 PM	#3
Mr. Triatic diyAudio Member Join Date: Feb 2002 Location: SWE EU	wonderful! then i probably can replace them with a dual OPA2134...?! the victim is a Denon DA-500 DAC, i ripped off the cover and spotted those opamps... Cheers mate, thanks for the quick reply! /Ludvig. __________________ www.joddla.net/audio/

19th February 2005, 07:08 AM	#7
EIRA diyAudio Member Join Date: Feb 2005 Location: Rotterdam	M5218 I found the datasheet here: http://www.datasheetarchive.com/sear...218&sType=part I changed the 5218 (slew rate 3 V/us) by and OPA2134 (slew rate 20 V/us) and put two larger capacitors in the power supply. A great improvement. more power in a shorte base, more open sound, more solid, softer mid. Absolute worthewile the 10 Euro's I paid for the 2134!

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16th February 2005, 11:30 PM	#4
EIRA diyAudio Member Join Date: Feb 2005 Location: Rotterdam	Hi Ludwig... I planned to change these M5218 as well. Did you do it (back then in 2002)? and did it work out satisfactory?

17th February 2005, 10:34 AM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	If i was not wrong,datasheets of both are available at www.datasheetarchive.com.Personally for replacement of them,i will try any dual audio OP-AMP as long as pins compatibility is not an issue.

17th February 2005, 01:05 PM	#6
macboy diyAudio Member Join Date: Oct 2003 Location: Ottawa, Canada	You'll have more luck searching for M5218 (with A, AF, or AFP suffixes) and NJM4570 or JRC4570.

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