JRC 4558 DATASHEET PDF
The JRC integrated circuit by Japan Radio Company is a dual high gain operational amplifier internally compensated and constructed on a single silicon . JRC datasheet, JRC pdf, JRC data sheet, datasheet, data sheet, pdf, New Japan Radio, = NJM / Dual Operational Amplifier. jrc Datasheet PDF Download – Dual Operational Amplifier, jrc data sheet.
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By all reports, these sound as good as the original. They were consistently good. Ben HarmlessJun 4, So I don’t buy the Holy Grail theory. What we could all really wish for is that large-scale pedal manufacturers would actually do LISTENING tests on these “identical” parts, rather than just buying whatever is cheapest at the moment. I don’t think I went overboard with the cost on this one. I have another clone of the same circuit that I paid significantly less for and it shows.
Oh, and I should add that it’s unlikely listeners will “get the chips right” in say, blind testing between vintage JRC and new Fairchild. Jun 4, What have y’all overheard at the musician’s watercooler discussions? Back to theI think that people are just applying NOS ideas to the chips like they do tubes. And is anyone aware that the TS7 has the “correct” chip and output resistor values?
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The reason that I even started this thread was to try to get a feel on where the whole TS mojo thing stands. The TL drives things harder and it datasheer tighter and crisper.
If you’re doing this to a TS 10, short out the 1K resistor leading to pin 3 of 45588 dual opamp as well. They had nothing in common. TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in. May 24, 8.
JRC Dual Op Amp IC | NightFire Electronics LLC
I guess I’ll check back in 10 years from now and see how things have changed. Robbie WMay 24, There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie.
In addition, the JRCD jr used in tons of Japanese daasheet equipment at about the same time, so a junky cheap Japanese stereo or clock radio could have several hidden inside it.
I yanked it out and put it in my TS5. If you hear a difference then by all means go with what sounds best to you.
May 23, 3. The clone had premium caps as well. It’s a little relieving to know datsaheet some of the opamp chip gurus were willing to let this out of the bag. Does true “New Old Stock” matter? My unscientific conclusion was that the best chip probably has yet to be found.
May 24, 6. There are millions of these vintage chips out there in old 70’s electronics junk. And, of course, this is because they all meet the same specifications. The Rat2 is ddatasheet same way.
There is a post above that is proof positive of this. May 24, 9. I put this in the same piles as some of the capacitor, resistor and conductor stuff floating around.
JRC Datasheet PDF – Dual Operational Amplifier
And I started probing really deep around the time that Analogman started offering their wares, oddly enough. Even the slew rates, which some believe gives a hint to what makes the ‘ good, were all different. The reason a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit.
All had the socket installed, and were cooked 2 output resistor mod. I may even run some new tests with more chips, to see if I can find something better than my beloved TL May 23, 1.
They are still available in isolated caches of parts, although they can sometimes be hard to find. I’m just wondering where things currently stand. Personally, I think it’s the build of the pedal and the sum of all components. It’s amazing how some of these falsehoods prevail. Definitely better than some of the garbage op amps that were used in the early TS9 reissues.
There are over 40 different dual op amp chips available. I attribute the superior tone to the builder of the box. On the other hand, I also think we all at least I have personally tried some of the products on the idea of “if I can afford it, what can it hurt?
If you want a JRC chip for a project, get a new chip from Steve at Small Bear Electronics who sells datashet cheap sorry we dont have time to sell chips or small parts.