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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May 24, As far as ‘s in general I will say this. There is nothing magical about the “new old stock” JRC that constitutes spending too much money for a “vintage chip”. Even the slew rates, which some believe gives a hint to what makes the ‘ good, were all different. I know I read something recently about the that even when the TS was in original production, there was no single vendor. I don’t think I went overboard with the cost on this one.

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?

JRC4558 Dual Op Amp IC

Jun 3, May 23, 2. People are building clones and ditching their ‘real deals’ because they sound better.

May 23, 3. All of the ‘ variants sounded quite similar and ‘good’. One of the 9’s was beefed up with better i. There are probably 3 that most guitarists would agree sound ‘bad.

The reason a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit. There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie.

I think the dayasheet end stereo guys, in particular, have been suseptable to this sort of pseudo-scientific clap-trap. I yanked it out and put it in my TS5. 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. So I don’t buy the Holy Grail theory.


The TL fatasheet things harder and it is tighter and crisper. They had nothing in common. I have another clone of the same circuit that I paid significantly less for and it shows. By all reports, these sound as good as the original. There is a post above that is proof positive of this. May 24, 6. Both have the JRC Jrc5458 reason that I even started this thread was to try to datashset a feel on where the whole TS mojo thing stands. I may even run some new tests with datashee chips, to see if I can find something better than my beloved TL TL my fave The LT was also kinda cool sounding, but not consistently so in krc4558 handful of pedals that I tried it in.

Yes, my password is: There are over 40 different dual op amp chips available. They were consistently good. Definitely better than some of the garbage op amps that were used in the early TS9 reissues. 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.

We have all gotten used to that noise, so it sounds better. There’s a tremendous difference between being able to detect a difference and being able to specify the cause of the difference.

Conversion to TS – this seems to be a perennial hot one. I liked the 3 listed above enough to ‘splurge’ and order about 15 of each.

JRC Datasheet PDF –

There were zillions of the real “JRC” made when it was current. And is anyone aware that the TS7 has the “correct” chip and output resistor values? There are millions of these vintage chips datadheet there in old 70’s electronics junk.


I don’t think we’ll see a pedal guru doing any sort of semi-scientific chip preference test any time soon though May 24, 7. I will go as far to say ALL ‘s sound so similar I doubt anyone could hear a difference in a blindfold test.

Do you already have an account? Your name or email address: The old pedal was not superior to the new one in any way, in fact, it was inferior in ways.

No, create an account now.

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. On the other hand, “better” and “vintage” aren’t necessarily the same thing, even though they get jumbled together in our sorry little heads. That’s one o’ them boxes what makes yer amp sound real loud innit?

JRC myths | Telecaster Guitar Forum

The TL has a lot higher input impedance extremely higher actually. I’m just curious, because most pedal experts seem to concur that both datasheett and current production chips from different parts of Asia all tend to sound consistently the same. 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.

If you’re doing this to a TS 10, short eatasheet the 1K resistor leading to pin 3 of the dual opamp as well.

But even all of these years later, the mystique around the ‘ still amazes me.