madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: aballen on September 13, 2013, 02:13:38 AM

Title: Sharkfin opamp substitution
Post by: aballen on September 13, 2013, 02:13:38 AM
Is it safe to replace the lm741 opamps with lm741 op amps?

Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 13, 2013, 02:44:53 AM
Quote from: aballen on September 13, 2013, 02:13:38 AM
Is it safe to replace the lm741 opamps with lm741 op amps?
Wait...what?
Title: Re: Sharkfin opamp substitution
Post by: das234 on September 13, 2013, 02:40:17 PM
Ditto Jimi.
Title: Re: Sharkfin opamp substitution
Post by: hammerheadmusicman on September 13, 2013, 03:51:03 PM
I would say, yes.
Title: Re: Sharkfin opamp substitution
Post by: RobA on September 13, 2013, 04:45:28 PM
Quote from: hammerheadmusicman on September 13, 2013, 03:51:03 PM
I would say, yes.
I'm pretty sure that you are right.
Title: Re: Sharkfin opamp substitution
Post by: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Title: Re: Sharkfin opamp substitution
Post by: billstein on September 13, 2013, 07:03:46 PM
Definitely go with the lm741 op amp. Whatever you do, don't use the lm741 opamp!
Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 13, 2013, 08:21:58 PM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Small bear gots the 2mb pots. Someone should head up a group buy...
Title: Re: Sharkfin opamp substitution
Post by: Haberdasher on September 13, 2013, 09:45:12 PM
Quote from: jimilee on September 13, 2013, 08:21:58 PM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Small bear gots the 2mb pots. Someone should head up a group buy...
Yeah, even a small group buy cooperative would be cool in this case, because that's about the only thing I'd need from smallbear atm.  that pot would cost me about $7.25 if I just order one.  that's over half of what I paid for the pcb, lol.
Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 13, 2013, 10:17:41 PM

Quote from: Haberdasher on September 13, 2013, 09:45:12 PM
Quote from: jimilee on September 13, 2013, 08:21:58 PM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Small bear gots the 2mb pots. Someone should head up a group buy...
Yeah, even a small group buy cooperative would be cool in this case, because that's about the only thing I'd need from smallbear atm.  that pot would cost me about $7.25 if I just order one.  that's over half of what I paid for the pcb, lol.
eeeeexactly
Title: Re: Sharkfin opamp substitution
Post by: Haberdasher on September 13, 2013, 11:06:27 PM
Quote from: jimilee on September 13, 2013, 10:17:41 PM

Quote from: Haberdasher on September 13, 2013, 09:45:12 PM
Quote from: jimilee on September 13, 2013, 08:21:58 PM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Small bear gots the 2mb pots. Someone should head up a group buy...
Yeah, even a small group buy cooperative would be cool in this case, because that's about the only thing I'd need from smallbear atm.  that pot would cost me about $7.25 if I just order one.  that's over half of what I paid for the pcb, lol.
eeeeexactly
(http://www.empowernetwork.com/msycks/files/2013/01/benStillerDoIt1.jpg)
Title: Re: Sharkfin opamp substitution
Post by: Guitarmageddon on September 14, 2013, 03:22:07 AM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Grab a dual gang 1M from tayda and run both in series. ;)
Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 14, 2013, 04:06:48 AM

Quote from: Guitarmageddon on September 14, 2013, 03:22:07 AM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Grab a dual gang 1M from tayda and run both in series. ;)
would that be pin 1 to pin 1 , pin2 to pin 2 and pin 3 to pin 3 on each gang?
Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 14, 2013, 04:07:57 AM

Quote from: Haberdasher on September 13, 2013, 11:06:27 PM
Quote from: jimilee on September 13, 2013, 10:17:41 PM

Quote from: Haberdasher on September 13, 2013, 09:45:12 PM
Quote from: jimilee on September 13, 2013, 08:21:58 PM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
haha he probably meant ua741 or njm741, both of which should work afaik.

fwiw, i read once that OP07 was made to replace/upgrade the 741, and tayda has them cheap.  I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Small bear gots the 2mb pots. Someone should head up a group buy...
Yeah, even a small group buy cooperative would be cool in this case, because that's about the only thing I'd need from smallbear atm.  that pot would cost me about $7.25 if I just order one.  that's over half of what I paid for the pcb, lol.
eeeeexactly
(http://www.empowernetwork.com/msycks/files/2013/01/benStillerDoIt1.jpg)
What do you figure it would cost a guy to ship a 2mb in a small envelope?
Title: Re: Sharkfin opamp substitution
Post by: Guitarmageddon on September 14, 2013, 04:13:06 AM
Quote from: jimilee on September 14, 2013, 04:06:48 AM

Quote from: Guitarmageddon on September 14, 2013, 03:22:07 AM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Grab a dual gang 1M from tayda and run both in series. ;)
would that be pin 1 to pin 1 , pin2 to pin 2 and pin 3 to pin 3 on each gang?
No. Wire to lug 1A, jumper lug, 2A to lug 1B, wire to lug 2B. 3rd lugs are unused. It puts the two halves in series. Fully ccw 0ohms, fully cw 2M.
Title: Re: Sharkfin opamp substitution
Post by: jimilee on September 14, 2013, 04:15:01 AM

Quote from: Guitarmageddon on September 14, 2013, 04:13:06 AM
Quote from: jimilee on September 14, 2013, 04:06:48 AM

Quote from: Guitarmageddon on September 14, 2013, 03:22:07 AM
Quote from: Haberdasher on September 13, 2013, 05:56:23 PM
I'm going to try them in my sharkfin pcb if i ever locate a 2mb pot.
Grab a dual gang 1M from tayda and run both in series. ;)
would that be pin 1 to pin 1 , pin2 to pin 2 and pin 3 to pin 3 on each gang?
No. Wire to lug 1A, jumper lug, 2A to lug 1B, wire to lug 2B. 3rd lugs are unused. It puts the two halves in series. Fully ccw 0ohms, fully cw 2M.
genius!
Title: Re: Sharkfin opamp substitution
Post by: aballen on September 14, 2013, 05:19:17 PM
Oh man,  I meant tlo71, lm741
Title: Re: Sharkfin opamp substitution
Post by: jimilee on July 30, 2014, 04:01:18 AM
Quote from: aballen on September 14, 2013, 05:19:17 PM
Oh man,  I meant tlo71, lm741
Can the tl071 work? I got no sound in my build so far.