TL072 substitute? (They're expensive now outside the USA)

Robert said:
I've had no experiences with them and I think they used to be reputable but it hasn't been flattering lately.
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Jameco is the only supplier i know of for the 9203 LDRs with the correct specs but they have a $20 order minimum.
 
Big Monk said:
Jameco is the only supplier i know of for the 9203 LDRs with the correct specs but they have a $20 order minimum.
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is that what i need for the electrovibe? about to order from jameco and i'll get these and drop the other nonsense filler i was using to hit 20$
 
StompBoxParts has the TL072IP for $.65. Granted, minimum purchase of 5 but that’s slight. They also have the CP version that’s a tad cheaper.

stompboxparts.com

TL072IP - Dual Op-Amp IC

Top Quality Parts for Guitar Effects Pedals and DIY Music Devices. Knobs, Pots, Switches, Kits, LEDs, Enclosures, Jacks, Wire, Resistors, Capacitors, Semiconductors
stompboxparts.com stompboxparts.com
 
jeffwhitfield said:
StompBoxParts has the TL072IP for $.65. Granted, minimum purchase of 5 but that’s slight. They also have the CP version that’s a tad cheaper.

stompboxparts.com

TL072IP - Dual Op-Amp IC

Top Quality Parts for Guitar Effects Pedals and DIY Music Devices. Knobs, Pots, Switches, Kits, LEDs, Enclosures, Jacks, Wire, Resistors, Capacitors, Semiconductors
stompboxparts.com stompboxparts.com
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There's a reason I wrote for people who do not live in the USA in big bold letters in the OP. It's bad enough paying postal rates from the US on PCBs, which I can't get anywhere else. Things that I can get locally or direct from Asia (which is much closer to me than the USA) are much more affordable.
 
temol said:
My experience with 72's from Ali is bad. Three different sellers. Stuff of course works, but sounds bit fizzy on decay (crossover distortion, that's not present with legit chips).
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I bought some, I'll see how they go.
 
DAJE said:
There's a reason I wrote for people who do not live in the USA in big bold letters in the OP. It's bad enough paying postal rates from the US on PCBs, which I can't get anywhere else. Things that I can get locally or direct from Asia (which is much closer to me than the USA) are much more affordable.
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Hence the post about my local (South African) supplier 😉
 
@PedalPCB

Hypothetically speaking, if there were to be a wave of obsolescence with respect to certain semiconductors, would it be feasible to redesign some boards to include SMD components preinstalled from the fabrication houses?

Then people could still populate the through hole components without any of the headaches of messing with the SMD parts.
 
DAJE said:
I did have a look at the site, couldn't see any info about international shipping though. I'm all for Southern Hemisphere solidarity.
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Agreed, my friend. Sure, would you like me to investigate for you?
 
Big Monk said:
@PedalPCB

Hypothetically speaking, if there were to be a wave of obsolescence with respect to certain semiconductors, would it be feasible to redesign some boards to include SMD components preinstalled from the fabrication houses?

Then people could still populate the through hole components without any of the headaches of messing with the SMD parts.
Click to expand...
JLCPCB want you to use generic components they stock, or buy hundreds or thousands of pieces that they keep in their warehouse and can only be used in builds done by them. So if I don't want to use Uniroyal SMD resistors I'm not going to be happy with using JLCPCB, for the most part. I've never even seen a Uniroyal part but they are certainly cheap, at least. And none of the opamps I prefer to use are readily available there, buying 5000 or even 100 units to be warehoused in the ROC is just not happening.

About five years ago I saw the handwriting on the wall and learned to hand solder relatively large format SMD parts like SOIC-8 and 1206 ones. I can do a size smaller than those fairly happily, then it would begin to get dodgy for this old dog. ;)
 
My experience with the fab houses is that when they DO source components from other vendors for you they do not extend the bulk pricing discount on to you. You end up paying the individual price for quantities in the thousands.

Not a huge deal for resistors and caps, but that adds up QUICK when you're working with the THAT4305.

And don't forget customs fees.... That's tough to avoid with an assembled PCB in large quantities.
 
Big Monk said:
@PedalPCB

Hypothetically speaking, if there were to be a wave of obsolescence with respect to certain semiconductors, would it be feasible to redesign some boards to include SMD components preinstalled from the fabrication houses?

Then people could still populate the through hole components without any of the headaches of messing with the SMD parts.
Click to expand...

What about those little (scary) SOIC to through hole adapter boards? I optimistically ordered a couple and can scarcely see the little lines on them 🤨
 
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