Guitar pre amp

[Antaryan]

Good morning masters...
Could help me with this board?
https://drive.google.com/file/d/1-XcCqeKjhfIwX-T0TzogxiR5CdOxS6i2/view?usp=drivesdk
The Tlo74 ic is getting so hot....
I want to ask if i have been decieved by this board
Suggesting me other design is very very very much appreciated...thank you very much God bless you all

[Blackboarcult]

I'd start checking voltages around it and making sure the IC isn't flipped. I've blown my fair share of TL074's by mistakenly putting negative voltage or where positive voltage should go and vice versa. And they get really hot (breadboard-melting level hot) before screwing up.

Make sure you have the correct transformer too. With the complete project documents maybe we'd be able to help you a little better.

[Antaryan]

I hope you mean this documents, where the schematic was placed...i hope you can help me why this problem happened

I attached the file for references

On Thu, 9 May 2019, 5:36 PM blackboarcult [via Guitar FX Layouts], <[hidden email]> wrote:

I'd start checking voltages around it and making sure the IC isn't flipped. I've blown my fair share of TL074's by mistakenly putting negative voltage or where positive voltage should go and vice versa. And they get really hot (breadboard-melting level hot) before screwing up.

Make sure you have the correct transformer too. With the complete project documents maybe we'd be able to help you a little better.

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[Antaryan]

and this is also the video that it is working i wonder whats the secret behind....

https://youtu.be/rtKke9fKO-0

On Thu, 9 May 2019, 8:45 PM Juan Ornopia, <[hidden email]> wrote:

I hope you mean this documents, where the schematic was placed...i hope you can help me why this problem happened

I attached the file for references

On Thu, 9 May 2019, 5:36 PM blackboarcult [via Guitar FX Layouts], <[hidden email]> wrote:

I'd start checking voltages around it and making sure the IC isn't flipped. I've blown my fair share of TL074's by mistakenly putting negative voltage or where positive voltage should go and vice versa. And they get really hot (breadboard-melting level hot) before screwing up.

Make sure you have the correct transformer too. With the complete project documents maybe we'd be able to help you a little better.

---

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http://guitar-fx-layouts.42897.x6.nabble.com/Guitar-pre-amp-tp46509p46514.html

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NAML

[Blackboarcult]

Can't say it's a clear and well-designed project, honestly...

Anyway, as stated above, start by checking your voltages at transformer output and board input, and on TL074 pins 4 and 11. Make sure it is not inverted, and check against the datasheet if any doubts about polarity.

If you have etched your own board, check between traces to locate any possible shortcuts.

If all this fails, please post hi-res pictures of your build.

On another note, I just listened to the demo video, and IMO there are way better sounding builds than this one in DIY forums and websites...

[Antaryan]

Thank you very much sir....is it possible if i can just copy the input stage from schematic and change the overdrive stage with some of tagboard design like ehc ic 77 big muff of mark where they use also the tlo74....i just wondering if i can just make the diy amplifiers directly from that builds....in short i dont rely on that design i shown ...all i want to know if i can just make that tlo72 input can make a sound any sort of diy amps with mono inputs like mosfets...  From tlo72 + tagboard design + solid state amps = will it should sound? 

Could i ask some tips from you sir? Thank you very very much....Godbless you always... 

On Fri, 10 May 2019, 11:48 PM blackboarcult [via Guitar FX Layouts], <[hidden email]> wrote:

Can't say it's a clear and well-designed project, honestly...

Anyway, as stated above, start by checking your voltages at transformer output and board input, and on TL074 pins 4 and 11. Make sure it is not inverted, and check against the datasheet if any doubts about polarity.

If you have etched your own board, check between traces to locate any possible shortcuts.

If all this fails, please post hi-res pictures of your build.

On another note, I just listened to the demo video, and IMO there are way better sounding builds than this one in DIY forums and websites...

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NAML

[Blackboarcult]

If it's your first amp build, I'd go with something simpler.
This thread may give you a few ideas to try.
It's way easier to purchase those two-bucks Class D amp, build a preamp of choice and power them via a standard 9-18V adapter than building the whole circuit from an unclear project ;-)

[Antaryan]

Thank you very very much sir...for taking me there...

On Sat, 11 May 2019, 5:03 PM blackboarcult [via Guitar FX Layouts], <[hidden email]> wrote:

If it's your first amp build, I'd go with something simpler.
This thread may give you a few ideas to try.
It's way easier to purchase those two-bucks Class D amp, build a preamp of choice and power them via a standard 9-18V adapter than building the whole circuit from an unclear project ;-)

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