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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There is nothing magical fatasheet the “new old stock” JRC that constitutes spending too much money for a “vintage chip”. The old pedal was not superior to the new one in any way, in fact, it was inferior in ways.

If you’re doing this to a TS 10, short out the 1K resistor leading to pin 3 of the dual opamp as well. That’s one o’ them boxes 4558p makes yer amp sound real loud innit?

HWD4558 Datasheet

Does true “New Old Stock” matter? However, I think the nature of how silicon works vs.

There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie. So I don’t buy datashete Holy Grail theory. TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in. May 23, 3. The TL drives things harder and it is tighter and crisper. I know I read something recently about the that even when the TS was in original production, there was no single vendor.


Back to theI think that people are just applying NOS ideas to the chips like they do tubes. One of the 9’s was beefed up with better i.

JRC4558 myths…

No, create an account now. May 24, 8. May 455p, 9. What we could all dagasheet 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. May 24, 6. There is some confusion at present over what is a true or “vintage” JRC The in a Tube Screamer does have a sound that is good and is what a lot of people find to their liking. 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: They are still available in isolated caches of parts, although they can sometimes be hard to find.

All had the socket installed, and were cooked 2 output resistor mod. The reason a carbon comp resistor sounds “better” than a film resistor is the additional noise it adds to the circuit. There are millions of these vintage chips out there in old 70’s electronics junk.

JRC myths | Telecaster Guitar Forum

Conversion to TS – this seems to be a perennial hot one. By all reports, these sound as good as the original. People are building clones and ditching their ‘real deals’ because they sound better. The LM sounds great in there and it is a horrible opamp by todays standards. I feel this is the primary reason for the audible differences.


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? May 23, 1. I don’t think I went overboard with the cost on this one. datazheet

All of the ‘ variants sounded quite similar and ‘good’. Back when my vintage Rat II died and I needed a replacement, Satasheet was kind of shocked just how inferior the current production Rats are – and the only substantial difference is the op amp. They were consistently good.

p datasheet & applicatoin notes – Datasheet Archive

Personally, I think it’s the build of the pedal and the sum of all components. Ben HarmlessJun 4, Jun 4, It’s a little relieving to know that some of the opamp chip gurus were willing to let this out of the bag. 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.

As far as ‘s in general I will say this.