JRC datasheet, JRC pdf, JRC data sheet, datasheet, data sheet, pdf, New Japan Radio, = NJM / Dual Operational Amplifier. the end of the datasheet. Noninverting Amplifier Schematic. 1. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes. [CAUTION]. The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application.

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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 feel this is the primary reason for the audible differences.

If you’re doing this to a TS 10, short out the 1K resistor leading to pin 3 of the dual opamp as well. I may even run some new tests with more chips, to see if I can find something better than my beloved TL They are still jrc45588 in isolated caches of parts, although they can sometimes be hard to find.

There were zillions of the real “JRC” made when it was current. Saying that the ‘ is the best dual opamp for a TS type pedal is like winning the lottery the very first time you play.

JRC4558 myths…

Remove the compensation cap and put a TL in there with the rest of the circuit unmodded and it sounds awful. I don’t think we’ll see a pedal guru doing any sort of semi-scientific chip preference test any time soon though I will go as far to say ALL ‘s sound so similar I doubt anyone could hear a difference in a blindfold test. Great krc4558 made, truly.


Some circuits sound better with inferior spec’ed chips. 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.

JRC Datasheet PDF – Dual Operational Amplifier

May 24, 8. May 23, 1. What have y’all overheard at the musician’s watercooler discussions? May 24, 9. When you order these, you get parts that are labeled “JRC”.

JRC Dual Op Amp IC | NightFire Electronics LLC

Back to theI think that people are just applying NOS ideas to the chips like they do tubes. May 24, On the other hand, I also think we all at ratasheet I have personally tried some of the products on the idea of “if I can afford it, what can it hurt?

As far as ‘s in general I will say this. By all reports, the current manufacture JRCD’s sound just as good as the ones current with the manufacture of the original tube screamers.

People are building clones and ditching their ‘real deals’ because they sound better.

I didn’t overhear anything. I liked the 3 listed above enough to ‘splurge’ and order about 15 of each. That’s one o’ them boxes what makes yer amp sound real loud innit?


The Rat2 is the same way. Are the misinformed still spending 30 bucks or more for a “NOS” chip, and 2 “brown sound” resistors? All had the socket installed, and were cooked 2 output resistor mod. I put this in the same piles as some of the capacitor, resistor and conductor stuff floating around. The differences between the TL and the are subtle, but there none the less.

But even all of these years later, the mystique around the ‘ still amazes me. Early TS’s have the Ibanez R “trademark” logo which some people seek. I sent Analogman my TS-9 several years ago and had him replace the chip and beef up some weak spots with no jrc4585 mods and it came back as he described: It’s a demonstrable fact that the tone quality of op amps varies significantly. There is nothing magical about the “new old stock” JRC that constitutes spending too much money for a “vintage chip”.

Several electronics suppliers list the JRC May 24, 6. Ben HarmlessJun 4, I datashwet the high end stereo guys, in particular, have been suseptable to this sort of pseudo-scientific clap-trap.