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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There are over 40 different dual op amp chips available. I put this datasheeet the same piles as some of the capacitor, resistor and conductor stuff floating around.
All of the ‘ variants sounded quite similar and ‘good’. You must log in or sign up to reply here. Remove the compensation cap and put a TL in there with the rest of the circuit unmodded and it sounds awful. The reason that I even started this thread was to try to get a feel on where the whole TS mojo thing stands. Even the slew rates, which some believe gives a hint to what makes the ‘ good, were all different.
May 23, 3. I don’t think we’ll see a pedal guru doing any sort of semi-scientific chip preference test any time soon though I know I read something recently about the that even when the TS was in original production, there was no single vendor. Definitely better than some of the garbage op amps that were used in the early TS9 reissues. No, create an account now.
These 3, in particular, sounded really, really good.
It’s amazing how some of these falsehoods prevail. Yes, my password is: I tested about 25 different chips back in ’99, in a datasehet 9’s, a few 5’s, and a clone. 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. All had datwsheet socket installed, and were cooked 2 output resistor mod. May 23, 2. I guess I’ll check back in 10 years from ratasheet and see how things have changed. There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie.
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TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in. I feel this is the primary reason for the audible differences. 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.
There is nothing magical about the “new old stock” JRC that constitutes spending too much money for a “vintage chip”.
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Saying that the ‘ is the best dual opamp for a TS type pedal is like winning the lottery the very first time you play. Are the misinformed still spending 30 bucks or more for a “NOS” chip, and 2 “brown sound” resistors?
Jun 3, There are millions of these vintage chips out there in old 70’s datasheeh junk. I wish I could say that it sounded noticably better but the TL that I put in the amp did! And, of course, this is because they all meet the same specifications. Robbie WMay 24, However, I think the nature of how silicon works vs. By all reports, these sound as good as the original.
JRC4558 Datasheet PDF
Conversion to TS – this seems to jdc4558 a perennial hot one. 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 reason a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit.
May 24, 6. May 23, 4. If you want a JRC chip for a project, get a new chip from Steve at Small Bear Dayasheet who sells them cheap sorry we dont have time to sell chips or small parts. 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.
Do you already have an account? I may even run some new tests with more chips, to see if I can find something better than my beloved TL That’s one hrc4558 them boxes what makes yer amp sound real loud innit?