Duck Box
- Thread starter bhcarpenter
- Start date
Feral Feline
Well-known member
Excellent! Great graphic of Donald getting in your face, but then you get to stomp on his! 
Here's the link for anyone with bass-minded meanderings https://forum.pedalpcb.com/threads/pedals-for-bass-guitar.7978/
Here's the link for anyone with bass-minded meanderings https://forum.pedalpcb.com/threads/pedals-for-bass-guitar.7978/
Betty Wont
Well-known member
Aren't 4558s the most commonly available dual opamp?
Paradox916
Well-known member
It might be a close fight between 4558 and Tl072
andare
Well-known member
I have no idea, just a noob. But I do know that I can't find any NJM4558s and I don't have the knowledge to know if any other IC with 4558 in the name is a substitute.
For example, are the TC1044SCPA and MAX1044 equivalent?
Feral Feline
Well-known member
Just make sure the 4558 you order is a DIP:
(unless you have a build that requires a SIP):
.
Chip-sniffers will opine there is a difference between an older JRC and NJM or other newer variants, but …
www.freestompboxes.org
I suggest — SOCKET your IC, buy some chips (TL072, TL082, 4558, 4559?, Burr Brown, etc) and see what works best for you & your Duck Box, trust your own ears — if you can hear a difference, is the pricey Burr Brown worth the added expense?
For charge pumps, I have heard of problems with the max1044 so I stick with TC1044SCPA.
(unless you have a build that requires a SIP):
.
Chip-sniffers will opine there is a difference between an older JRC and NJM or other newer variants, but …
Op amp questionaire!!!
Okay I know the great people of this site are well capable of helping my latest question. Who can explain the differences in the most common Op amps and the most common Op amp replacements. For example I know some places swear that the 4885 is the
www.freestompboxes.org
I suggest — SOCKET your IC, buy some chips (TL072, TL082, 4558, 4559?, Burr Brown, etc) and see what works best for you & your Duck Box, trust your own ears — if you can hear a difference, is the pricey Burr Brown worth the added expense?
For charge pumps, I have heard of problems with the max1044 so I stick with TC1044SCPA.
bhcarpenter
Well-known member
@andare these are what I used for my build: https://www.taydaelectronics.com/njm4558d-njm4558-4558-ic-dual-op-amp.html
bhcarpenter
Well-known member
No worries! I feel you.
The letters at the front are manufacturer codes, except when they aren’t. The letters at the end typically don’t matter, except when they do. You can pretty much count on DIP packaging for through hole ICs, unless it’s SIP. NJM and JRC are the same company.
