Texas Instruments P Operational Amplifiers – Op Amps are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas. P Semiconductors are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for P Semiconductors. Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current.

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I tested about 25 different chips back in ’99, in a few 9’s, a few 5’s, and a clone. There were zillions of the real “JRC” made when it was current.

f p datasheet & applicatoin notes – Datasheet Archive

Sorry to kick over any sacred cows but this is just my opinion based on my experience. So I don’t buy the Holy Grail theory. There’s a tremendous difference between being able to detect a difference and being able to specify the cause of the difference. May 24, 8. I liked the 3 listed above enough to ‘splurge’ and order about 15 of each. When you order these, you get parts that are labeled “JRC”.

P Datasheet catalog

Ben HarmlessJun 4, Yes, my password is: Do you already have an account? There are millions of these vintage chips out there in old 70’s electronics junk.

All had the socket installed, and were cooked 2 output resistor datadheet. That’s one o’ them boxes what makes yer amp sound real loud innit? Are the misinformed still spending 30 bucks or more for a “NOS” chip, and 2 “brown sound” resistors? I sent Analogman my TS-9 several years ago and datashest him replace the chip and beef up some weak spots with no other mods and it came back as he described: May 24, 6.


I guess I’ll check back in 10 years from now and datashest how things have changed. It’s a little relieving to know that some datashheet the opamp chip gurus were willing to let this out of the bag. 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. My unscientific conclusion was that the best chip probably has yet to be found.

It’s amazing how some of these falsehoods prevail. If you hear a difference then by all means go with what sounds best to you. Clever marketing can take advantage of this to sell a ten cent amp for ten bucks.

Does true “New Old Stock” matter? I don’t think we’ll see a pedal guru doing any sort of semi-scientific chip preference test any time soon though The reason that I even started this thread was to try to datsheet a feel on where the whole TS mojo thing stands. Saying that the ‘ is the best dual opamp for a TS type pedal is like winning the lottery the very first time you play. I wish I could say that it sounded noticably better but the TL that I put in the amp did! These 3, in particular, sounded really, really good.

As far as ‘s in general I will say this. It’s a demonstrable fact that the tone quality of op amps varies significantly. Put a TL datasjeet there and be prepared for an overly bright and brittle sound. I may even run some new tests with more chips, to see if I can find something better than my beloved TL The differences between the TL and the are subtle, but there none the less. TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in.


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. I then went on to check the specs of each ‘good’ chip.

Some circuits sound better with inferior spec’ed chips. No, create an account now.

HWD4558 Datasheet

May 23, 1. Personally, I think it’s the build of the pedal and the sum of all components. 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. I feel this is the primary reason for the audible differences. I yanked it out and put it in my TS5. One of the 9’s was beefed up with better i. I’m catasheet wondering where things currently stand.

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 a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit.

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. Both have the JRC If you want a JRC chip for a project, get a new chip from Steve at Small Bear Electronics who sells them cheap sorry we dont have time to sell chips or small parts.

By all reports, these sound as good as the original.