[viper_45]

Hey,

In a moment of inspiration my subconscious decided to plug the op-amp in the wrong way, which has consequently killed it.

I'm looking for a place that sells the JRC 4556AD in the UK for use in an RA1 amp (or some other op-amp that is compatible perhaps?).

Thanx.

 

[guzzler]

RS Components, order code 313-7903. They'll hit you pretty hard on shipping though, so get some other stuff while you're there...

g

 

[awpagan]

Why use jrc4556's
I changed my opamps jrc4556 and jrc5534's for opa2228 opa228's
much cleaner detailed sound
big improvement

 

[aeriyn]

Err, OPA228 and its dual channel brother are high-speed opamps and can't be used at low gain. They're sometimes tricky to get working properly.

OPA227/2227 would be just as good, but are unity gain stable. Although I don't know what gain the RA-1 and clones are set to...

 

[viper_45]

Quote:

Originally Posted by awpagan Why use jrc4556's I changed my opamps jrc4556 and jrc5534's for opa2228 opa228's much cleaner detailed sound big improvement

What amp did you do this on? I'm aware that the jrc4556s are not the best op-amps, which is why I suggested "compatible" op-amps.

Quote:

Originally Posted by aeriyn Err, OPA228 and its dual channel brother are high-speed opamps and can't be used at low gain. They're sometimes tricky to get working properly.

Does anyone here with an RA-1 have this information or have tried swaping the op-amps?

 

[Garbz]

I"m considering chiseling one out of my cdplayer if you want that one. No guarantee if it will work or be in one piece though

 

[viper_45]

Quote:

Originally Posted by Garbz I"m considering chiseling one out of my cdplayer if you want that one. No guarantee if it will work or be in one piece though

Thanks for your generosity, it's much appreciated, but fortunately someone has offered to ship some from the US.

 

[awpagan]

yes remove old ic put in socket, can now plug in any dual opamp for comparison
jrc4556 is a dual opamp equivilatons opa2134 opa2228 etc

viper45
modified philips cd850 on standard inbuilt output amp for headphones
big big big difference, for the better.
jrc4556 cheap versions of ne5534/2's