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

fig said:
It seems a down-under group buy may be in order? We do it here in the states as well, even though we’re all obviously billionaires with no sense of value and there’s a vending machine for whatever you want on every corner. Not really…but how noice would that be? :ROFLMAO:

There are a lot of dual op amps to be had (though I suspect they too are or will be edging up in cost). Not all will sound alike so I suggest buying a few of several popular types and auditioning each for builds. Although it’s time-consuming, you could even open up old builds and audition replacement dual op amps in those as well. That should free up enough 072s for builds that just don’t do well with the other duals.
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These are fine ideas, Mr Fig.
 
Maybe try a 4558 and/or a LM258. I’ve had success with these breadboarding and they are low-cost. Check your continent‘s electronics surplus sales…I find a LOT of deals here…


btw, which pedal are you building? If I have it, I could try some subs and at least offer an opinion.
 
fig said:
Maybe try a 4558 and/or a LM258. I’ve had success with these breadboarding and they are low-cost. Check your continent‘s electronics surplus sales…I find a LOT of deals here…


btw, which pedal are you building? If I have it, I could try some subs and at least offer an opinion.
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That brings a point. Some circuits NEED a TL072 to work right! I made a few Tyrian boards in the past using the great LM833 and NE5532 and the bass control was acting up, sounding like a broken synth and I just couldn't figure out what the hell was wrong. Then I swapped the expensive chips with the good old 072 and got the pedal working. The same with a angry Charlie v3
 
Guilherme Collateral said:
That brings a point. Some circuits NEED a TL072 to work right! I made a few Tyrian boards in the past using the great LM833 and NE5532 and the bass control was acting up, sounding like a broken synth and I just couldn't figure out what the hell was wrong. Then I swapped the expensive chips with the good old 072 and got the pedal working. The same with a angry Charlie v3
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Absolutely...you'll know fairly quick if it's a match or not.
 
fig said:
Maybe try a 4558 and/or a LM258. I’ve had success with these breadboarding and they are low-cost. Check your continent‘s electronics surplus sales…I find a LOT of deals here…


btw, which pedal are you building? If I have it, I could try some subs and at least offer an opinion.
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I have an Ocelot waiting to be built, which requires FIVE TL072s. But as it happens - I posted about this a couple of pages back - I got a bag of 20 "fake" TL072s from AliExpress and tested five pairs of them in my Kliché Mini and they sound fine. I listened closely and critically and I can't hear anything wrong with them. I left a pair in there. Now, it's possible that a pair of name brand TL072s might sound slightly better, but I have no complaints with my AE knock-offs.

I'd still buy into a group buy of TI originals, but when I put the Ocelot together I'll try my "fakes" first. I'm reasonably confident they'll be OK.
 
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DAJE said:
I have an Ocelot waiting to be built, which requires FIVE TL072s. But as it happens - I posted about this a couple of pages back - I got a bag of 20 "fake" TL072s from AliExpress and tested five pairs of them in my Kliché Mini and they sound fine. I listened closely and critically and I can't hear anything wrong with them. I left a pair in there. Now, it's possible that a pair of name brand TL072s might sound slightly better, but I have no complaints with my AE knock-offs.

I'd still buy into a group buy of TI originals, but when I put the Ocelot together I'll try my "fakes" first. I'm reasonably confident they'll be OK.
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When you get the orginal ones I recommend you compare it with the fake ones on the kliche circuit. Sounds really different, the decay of the notes will be much smoother
 
Guilherme Collateral said:
When you get the orginal ones I recommend you compare it with the fake ones on the kliche circuit. Sounds really different, the decay of the notes will be much smoother
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The original TL072s in that build are from Tayda, and I've seen people claiming those are "fake" too. I have no idea whether they're fake or genuine or whatever that even means in this context, but they sounded fine. I did listen very closely and critically, and I am not hearing anything wrong with them.

Possibly the problem is quality control, meaning that some batches are too far out of spec to use, while other batches are good.
 
giovanni said:
Where are you located if you don’t mind me asking?
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Chile. Shipping an order is at least 20 dollars, or even more depending on volume and that's without taxes. It's not very nice to buy for example 10 IC's for 8 bucks, then you have to pay 20 or more for shipping and taxes also.
 
cris_mas said:
Chile. Shipping an order is at least 20 dollars, or even more depending on volume and that's without taxes. It's not very nice to buy for example 10 IC's for 8 bucks, then you have to pay 20 or more for shipping and taxes also.
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Is there no free shipping to Chile for orders over $60?
 
cris_mas said:
Chile. Shipping an order is at least 20 dollars, or even more depending on volume and that's without taxes. It's not very nice to buy for example 10 IC's for 8 bucks, then you have to pay 20 or more for shipping and taxes also.
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What about Tayda? Same problem?
 
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