BA4560P op amp replacement

[bsco]

Just a quick question.....as I can't find anything on the net....no data sheets for the "P" designation....has anybody replaced this with a different number??
Cheers

[nickb]

I think the "P" just means plastic DIP package.

[R.G.]

It is very, very likely to be replaceable by a JRC4560 or other dual opamp with "4560" in the part number. This increases to almost certainty if it's an 8-pin DIP package.

[bsco]

Thanks nickb and R. G.....I couldn't find any data sheets with that designation...I saw an "N" but that is a single line pin arrangement and no designation..In that case I might have something here that would work.....Thanks for the help guys.....
Cheers

[Enzo]

Look in your op amp drawer. Any 4560 will work, or lacking that, likely a 4580 will also. An older 4558 will probably be fine, and of course the ubiquitous TL072 probably drops right in. All those work in basic amp circuits. If it is some super critical application, one might have to fudge.

DOn't worry about the vegetable soup.

[drewl]

There are slight performance differences, but usually any dual opamp will work.

The only time I had an issue was with an HC suffix meaning high current for something at my real job.

[Enzo]

yeah, I'd call that esoteric. I know some of the earlier Marshall SS amps had 1458 ICs instead of 4558. And if you went ahead and put "more modern" 4558 in there, the amp would be unstable. So I stock old 1458 op amps just for the occasional old Marshall.


I have even grabbed 2068 when my other drawer was empty. Our gear is remarkably tolerant of op amp subs.

[doctor]

Many technicians think that almost any operational amplifier can be replaced with virtually any op-amp. It is not right. There are many parameters that have a significant impact on the operation of the circuit, and finally on the sound quality.

Here are only few basic features that must be taken into account: input stage structure, maximum supply voltage, noise, slew rate, maximum output current, supply current.
The best way is to compare datasheets.

The TL072 has JFET-input and does not suitable to replace bipolar-input BA4560 op-amp.
On my opinion the best and simple replacement for the BA4560 is the 4580 (possible prefixes are BA, MC and NJM).

[bsco]

Thank you to Enzo, drewl and doctor....it is a reverb ckt....actually a Peavey KB/A300 amp....the op amp was split and causing a backround hum which would increase in volume as you cranked up the master reverb control...and that was with all other reverb send controls on the channels turned down...when I took the chip out of the socket, it fell apart in two pieces.......and it was installed in a socket.....I'll have to check my scrap boards to see if I have something....
Cheers

[Enzo]

COnsidering PV used teh 4558 for decades as the reverb IC, I expect that still works in place of the newer 4560.