Substitute for UA 1458 ctc op amp please

[grabread]

Any suggestions for a substitute for the UA 1458 ctc op amp please. I have seen NTE 778A suggested on one site, not much about likely subs for this one on the web. Something modern and readily available please.


Many thanks.

 

[gadget73]

try an LM1458. I think the UA might be Fairchild's prefix code.

 

[grabread]

I can get NE5532 from RS, Would this be a reasonable choice?

 

[Hyperion]

It looks like it is a dual µA741 - which means that LM4558N would probably be what I would use, NE5532 also seems to be OK - but apparently has a much higher slew rate - and is 3 times more expensive. Gadget73's suggestion of an LM1458 is excellent.

Farnell have LM1458N @ £0.685 and you can just buy one. (RS want to sell you 40!)

I recently bought some LM4558N (=RC4558P) from Farnell - very cheap at £0.227 each - but you have to buy 5, and the minimum order value is £20 - the shipping is free.

 

[grabread]

Thanks Hyperion, Would the slew rate be a problem? I don't mind it being a bit more expensive.

 

[Hyperion]

Would the slew rate be a problem?

Might be - the original would be around 1 or 2 V/µS and the NE5532 is 9V/µS - might cause instability? - all the other suggestions are very close for slew rate.

I found it very easy to set up an account at Farnell. - but I understand that the minimum order limit of £20 could be an issue if you only want one item.

 

[cpt_paranoia]

but I understand that the minimum order limit of £20 could be an issue if you only want one item

Drop an RPi into the basket...

 

[grabread]

Have ordered RC4558P from RS. 1.00 each delivered + vat.

Thanks for all your help.