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# Replacement

#### 2711martin

Oct 15, 2022
5
Hi maker.pro
i need som help to find replacement for this RC op-amp.. RC4558 DN ... 7237 in the schmatics for the amp ( 1970ìsh ) it is described as 5558, but in the amp there is 2 pc of RC4558 DN ... 7237 and 1 of RC4558 DN ... 7249.. HELP

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Feb 19, 2021
271
Schematic for the circuit, and what does the circuit do ?

You can still buy 4558 :

Regards, Dana.

Last edited:

#### davenn

Moderator
Sep 5, 2009
14,126
yeah, 4558's in several flavours are still available

#### 2711martin

Oct 15, 2022
5
Schematic for the circuit, and what does the circuit do ?

You can still buy 4558 :

Regards, Dana.
Hi Dana,, thanks for your replay,, yes im sorry that i did not explain what the circuit is for,, :-( here it comes : its for a 1970USA made Kustom Hustler guitar amp and its for the effect section print board PC5068.. I am in doubt as to what the letters DN mean and further more it seems that in the original diagram it says that it is a 5558 ? is 5558 another RC ? I have a JRC 4558D is it allright to use that ? https://drive.google.com/file/d/1uZWRTByEbNL4LQCZ0LYVIo_NmSh7So8M/preview?pli=1&rm=demo

#### 2711martin

Oct 15, 2022
5
yeah, 4558's in several flavours are still available
thanks for reply my man,, but what flavour will match a 4558DN, it from the effect section of an 1970kustom Hustler guitar amp..

#### kellys_eye

Jun 25, 2010
5,309
The 4558 is a dual op-amp (similar to the 741 single op-amp) and not a particularly difficult one to source. 'Any' 8-pin DIP packaged version will suit (don't get the SOIC or other surface-mount versions - there are lots around!).

The suffix letters usually refer to the package rather than the function so can be 'ignored' for all intent and purpose. The PREFIX letters indicate the manufacturer (Motorola, National Semiconductor etc) and can also be 'ignored'. A supplier selling a 4558 'dual op-amp' in the correct DIP package is easily sourced.

#### 2711martin

Oct 15, 2022
5
The 4558 is a dual op-amp (similar to the 741 single op-amp) and not a particularly difficult one to source. 'Any' 8-pin DIP packaged version will suit (don't get the SOIC or other surface-mount versions - there are lots around!).

The suffix letters usually refer to the package rather than the function so can be 'ignored' for all intent and purpose. The PREFIX letters indicate the manufacturer (Motorola, National Semiconductor etc) and can also be 'ignored'. A supplier selling a 4558 'dual op-amp' in the correct DIP package is easily sourced.
great,, thanks for reply.. then there should be no problem in useing a JRC4558D ?

Feb 19, 2021
271
Thats correct, JRC is fine.

Regards, Dana.

Oct 15, 2022
5

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