Forum Rules. Remember Me? Results 1 to 5 of 5. Thread: Drop in replacement for OPA opamp? Drop in replacement for OPA opamp? Sign in to disable this ad. Is there an opamp that would be a good drop in replacement?
Originally Posted by dickiefunk. Well it depends on the circuit. Typically it is the recommended upgrade to many OpAmps. Any upgrades to that will be expensive, may not offer that much of an improvement, will be hard to find, or may have troubles with oscillation and stability in that circuit.
In that range probably the only ones that would be worth trying would be an OPA or AD with a single to dual adapter board. Maybe try an LM which is new but many people like. Maybe an OPA Personally I would leave it alone. Focus on the tubes which more people suggest changing. Look also at caps worth changing or bypassing in the signal path or feedback loop. Kids these days! Whether this is due to the tube or its discrete bits I don't know, but it sounds a bit softer than a straight OPA preamp.
I would upgrade the tubes and leave the rest of the box alone. It is quieter, but that doesn't matter as the MPA noise will be dominated by its discrete input stage. If you're really desperate to mod this box, add some input transformers! Originally Posted by mshilarious. Replies: 12 Last Post: Replies: 18 Last Post: Wilkinson Drop-in replacement By chazba in forum Guitars and Basses. Replies: 6 Last Post:Sign in. Sign in with. We believe in helping you find the product that is right for you.
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I have on had 4 ad's that I was going to have installed and was considering the opa's. Perhaps I don't really need to roll the opamps?
Too bad it is not as easy are rolling tubes Share This Post. May 4, at AM. Post 2 of 5. Joined May 22, Messages Reaction score Joined May 22, Posts Likes I really like the Posted by l2sasm A on October 01, at I did a quick search in this forum to find a replacement for the OPA The opa also sounds best to my ears when biased into class-a, but by doing this will lower its drive capability so it must be buffered if used as a line driver.
But as i have learned to bring out the most from op-amps you must pay close attention to the datasheets and in 90 percent of cases have to make changes to the feedback resistor network for each op amp dropped in Power syupply lay-out, de-coupling, etc. The also has a lot of output drive capability, and can drive highly capacitive loads as well as very low impedance loads. Other op-amps may not be able to do this and unfortunately, a great many can not!
For instance, a does not like a lot of output capacitance, and can get harsh or brittle when so loaded. So if you try to drop a replacement into the socket where a was, the replacement may not have one of these attributes, and could fail, oscillate, distort, etc. Please note that if you substitute one of the popular op-amp "upgrades" that was originally intended for use as a video amplifier, then it may require a 75 ohm load in order to remain stable into capacitive loading, and that these are typically PS rail limited to lower voltages.
Amplified Parts. Audio Asylum Thread Printer Get a view of an entire thread on one page.User Name Stay logged in? I am a newbie at this and I didn't want to spend so much on the 's since they seem to be an older design that is more expensive because of the older production techniques when the cheaper can do as good or better in this application.
Can anyone provide me with some advice? Is this a relatively simple swap out?
I appreciate any help. I'm trying to squeeze a little more life out of this older CD player in the most cost effective way I can. OPA is bipolar input opamp.
It can be replaced but you'll get diferent sound character. You should give them a try, especially if you replace the output buffer. For the diff amps you should use high speed and wide bandwidth like OPA free samples available. It is a simple swap-out, there is nothing that can go wrong. Anyone selling this yet? Datasheet looks great! The OPA is a very nice sounding and performing op amp. I had replaced all four in my Ultech UCD but quickly changed them back. Waste of time in the Ultech in my opinion.
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I will be buying a AP because that's the only one available here. Should I later on order a ? What's the optimum voltage for a ? How much does it cost in the US.
Share This Post. Aug 20, at PM. Post 2 of 2. Joined May 22, Messages Reaction score Joined May 22, Posts Likes In other words, keep the voltage high like 2x9Vand there is no reason to change to a At digikey the price of the is 3. I don't think I wouldn't call either one a sound upgrade, but instead there is a difference in performace at a given voltage. Listen to it first, though, and see if it would be worth the trouble. You must log in or register to reply here.Free shipping.
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OPA2604 Datasheet and Pinout – FET-Input Low Distortion Operational Amplifier
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