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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JRC4558 Dual Op Amp IC
The reason a carbon comp resistor sounds irc4558 than a film resistor is the additional noise it adds to the circuit. Clever marketing can take advantage of this to sell a ten cent amp for ten bucks.
The TL drives things harder and it is tighter and crisper. 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. Do you already have an account? On the other hand, “better” and “vintage” aren’t necessarily the same thing, even though they get jumbled together in our sorry little heads.
The Rat2 is the same way. There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie.
The clone had premium caps as well. Your name or email address: 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. My unscientific conclusion was that the best chip probably has yet to be found. These 3, in particular, sounded really, really good. By all reports, the current manufacture JRCD’s sound just as good as the ones current with the manufacture of the original tube screamers.
Great points made, truly. Ben HarmlessJun 4, Yes, my password is: May 23, 3. I sent Analogman my 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: It’s amazing how some of these falsehoods prevail.
Several electronics suppliers list the JRC I don’t think I went overboard with the cost on this one.
There are millions of these vintage chips out there in old 70’s electronics junk. I yanked it out and put it in my TS5. There were zillions of the real “JRC” made when it was current. May 24, 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.
The TL has a lot higher input impedance extremely higher actually. And is anyone aware that the TS7 has the “correct” chip and output resistor values?
JRC Datasheet PDF – Dual Operational Amplifier
Are the misinformed still spending 30 bucks dataseet more for a “NOS” chip, and 2 “brown sound” resistors? May 24, 6.
You must log in or sign up to reply here. As far as ‘s in general I will say this.
Early TS’s have the Ibanez R “trademark” logo which some people seek. The in a Tube Screamer does have a sound that is good and is what a lot of people find to their liking. 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. But even all of these years later, the datashet around the ‘ still amazes jgc4558.
I put this in the same piles as some of the capacitor, resistor and conductor stuff floating around. May 23, 4. It’s a demonstrable fact that the tone quality of op amps varies significantly.
Remove the compensation cap and put a TL in there with the rest of the circuit unmodded and it sounds awful.
I think the high end stereo guys, in particular, have been suseptable to this sort of pseudo-scientific clap-trap. What have y’all overheard at the musician’s watercooler discussions? I have another clone of the same circuit that I paid significantly less for and it shows. Robbie WMay 24, That’s one o’ them boxes what makes yer amp sound real loud jrc458 There is some confusion at present over what is a true or “vintage” JRC May 24, 5.
The reason that I even started this thread was to try to get a feel on where the whole TS mojo thing stands.
I then went on to check the specs of each ‘good’ chip. 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. I may even run some new tests with more chips, to see if I can find something better than my beloved TL I attribute the superior tone to the builder of the box.