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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Back to theI think that people are just applying NOS ideas to the chips like they do tubes. They had nothing in common. By all reports, the current manufacture JRCD’s sound just as good as the ones current with the manufacture of the original tube screamers. I put this in the same piles as some of the capacitor, resistor and conductor stuff floating around. Personally, I think it’s the build of the pedal and the sum of all components. By all reports, these sound as good as the original.

JRC4558 Datasheet

May 23, 1. Jun 4, However, the odds that they’ll hear a difference are very good, and if there’s an audible difference, multiple listeners will have consistent preferences. Does true “New Old Stock” matter? That’s one o’ them boxes what makes yer amp sound real loud innit? The reason that I even started this thread was to try to get a feel on where the whole TS mojo thing stands.

I don’t think we’ll see a pedal guru doing any sort of semi-scientific chip preference test any time soon though I think the high end stereo guys, in particular, have been suseptable to this sort of pseudo-scientific clap-trap.


Put a TL in there and be prepared for an overly bright and brittle sound. I didn’t overhear anything. Back when my vintage Rat II died and I needed a replacement, I was kind of shocked just how inferior the current production Rats are – and the only substantial difference is the op amp.

Do you already have an account? I then went on to check the specs of each ‘good’ chip.

One of the 9’s was beefed up with better i. May 24, 6. This is where the rec. I don’t think I datwsheet overboard with the cost on this one. You must log in or sign up to reply here. The reason a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit.

I attribute the superior tone to the builder of the box. Log in or Sign up. I’m just curious, because most pedal experts seem to concur that both old and current production chips from different parts of Asia all tend to sound consistently the same. 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? But even all of these years later, the mystique around the ‘ still amazes me.

On the other hand, “better” and “vintage” aren’t necessarily the same thing, even though they get jumbled together in our sorry little heads. May 24, 8. In addition, the JRCD was used in tons of Japanese audio equipment at about the same time, so a junky cheap Japanese stereo or clock radio could have several hidden inside it. Several electronics suppliers list the JRC It’s a little datasneet to know that some of the opamp chip gurus were willing to let this out of the bag.


But I beleive datahseet old JRC version is the holy grail of some even though the actual chip in some of the originals may be made by others. Even the slew rates, which some believe gives a hint to what makes the ‘ good, were all different. Some circuits sound better with inferior spec’ed chips. These 3, in particular, sounded really, really good.

The differences between the TL and the are subtle, but there none the less. As far as ‘s in general I will say this.

Yes, my password is: I replaced the two output resistors with carbon film resistors I had laying around, and I just order a couple of new RCP’s for 25 cents a piece. Conversion to TS – this seems to be jr4c558 perennial hot one. It’s amazing how some of these falsehoods prevail.

JRC Datasheet PDF – Dual Operational Amplifier

So I don’t buy the Holy Grail theory. The TL has a lot higher input impedance extremely higher actually. I may even run some new tests with more chips, to see if I can find something better than my beloved TL