JRC datasheet, JRC pdf, JRC data sheet, datasheet, data sheet, pdf, New Japan Radio, = NJM / Dual Operational Amplifier. The JRC integrated circuit by Japan Radio Company is a dual high gain JRC Long Tailed Pair Differential Amplifier. . JRC Datasheet. Bookly Micro JRC datasheet, Dual Operational Amplifier (1-page), JRC datasheet, JRC pdf, JRC datasheet pdf, JRC pinouts.
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(Datasheet) JRC pdf – w w w .d e e h s a t a . Dual Operational Amplifier (1-page)
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. The in a Tube Screamer does have a sound that is good and jdc4558 what a lot of people find to their liking.
The clone had premium caps as well.
There were zillions of the real “JRC” made when it was current. The Rat2 is the same way. If you’re doing this to a TS 10, short out the 1K resistor leading to pin 3 of the dual opamp as well. There is a post above that is proof positive of this. I sent Analogman datashheet TS-9 several years ago and had him replace the chip and beef up some weak spots with no other mods and it came back as he described: Jfc4558 started researching TS’s quite a long time ago. On the other hand, “better” and “vintage” aren’t necessarily the same thing, even though they get jumbled together in our sorry little heads.
There is nothing magical about the “new old stock” JRC that constitutes spending too much money for a “vintage chip”. The TL drives things harder and it is tighter and crisper.
JRC4558 Datasheet PDF
They were consistently good. My unscientific conclusion was that the best chip probably has yet to be found. 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. 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.
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. TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in.
We have not lost technology over the years, like we have with tubes, we have taken the same technology and made it cleaner in the case of silicon. The thing is, op amps are actually fairly complicated devices internally, and can have widely varying behaviors for slew rate, noise, etc, while being “rated” the same in identical conditions. I think the high end stereo guys, in particular, have been suseptable to this sort of pseudo-scientific clap-trap.
There are over 40 different dual op amp chips available. May 23, 1. Great points made, truly. May 24, 7. What have y’all overheard at the musician’s watercooler discussions?
As far as ‘s in general I will say this. But even all of these years later, the mystique around the ‘ still amazes me. They had nothing in common. One of the 9’s was beefed up with better i. I didn’t overhear anything. Both have the JRC 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. Jun 3, And I started probing really deep around the time that Analogman started offering their wares, oddly enough.
Back to theI think that people are just applying NOS ideas to the chips like they do tubes. But I beleive the old JRC version is the holy grail of some even though the actual chip in some of the originals may be made by others. I liked the 3 listed above enough to ‘splurge’ and order about 15 of each.
I may even run some new tests with more chips, to see if I can find something better than my beloved TL 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? The reason that I even started this thread was to try to get a feel on where the whole TS mojo thing stands.
By all reports, these sound as good as the original. I put this in the same piles as some of the capacitor, resistor and conductor stuff floating around. May 23, 4.
I feel this is the primary reason for the audible differences. That’s one o’ them boxes what makes yer amp sound real loud innit?