Please do not use such a circuit as you will be unpleasantly surprised when the potentiometer becomes scratchy! You can then also omit the 100 µF electrolytic cap and one of the opamps. Less is often more.
Such circuits are only there to be able to use linear instead of logarithmic potentiometers for volume control. Regardless of that (logarithmic potentiometers can be found everywhere) the drawbacks count too much. Suppose a scratchy potentiometer and try to imagine what will happen at the output.
Such circuits are only there to be able to use linear instead of logarithmic potentiometers for volume control. Regardless of that (logarithmic potentiometers can be found everywhere) the drawbacks count too much. Suppose a scratchy potentiometer and try to imagine what will happen at the output.
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Nice! Very neat construction on the Veroboard.
The power amp circuit looks very similar to the Elektor ‘Equa’ amp I built in about 1975/76.
The power amp circuit looks very similar to the Elektor ‘Equa’ amp I built in about 1975/76.
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Thank you Sir, I had to use veroboard, my first time😱, the toner on my printer was finished and during lockdown a new cartridge was not available.I have build it for a friend for his braai place, you know what happens around a braai, people gets deaf and then the volume is increased.😀Lets hope it smokes the pipe !🙂
( braai- like barbecue, just much better )
( braai- like barbecue, just much better )
Hi @Prasi,
It looks like the NC drill file is in 2,5 format which I can't import into my pcb package (Diptrace) so I can make some minor mods. Is there any chance you could do a 2,4 version of the drill file? (I'm not familiar with Eagle, but it looks like the units need to be 1/10000 inch rather than 1/100000 inch)
Thanks,
Neil
Did it myself with a bit of python hacking to translate the formats to 2,4. (there are some python gerber tools called pcb-tools on github that have some useful functions)
Revised excellon drill file attached incase anyone else has a similar problem. All the gerbers and drill file can be loaded into Diptrace now.
I have one Retro Amp running. Dead quiet and sounds really good in mono. Stereo next and more checks with the scope and play with bias.
Planning a Retro 50 integrated build with a case from the diy store. A 330x230 Dissipante 2u looks about right. Bigger heat sinks this time!
Planning a Retro 50 integrated build with a case from the diy store. A 330x230 Dissipante 2u looks about right. Bigger heat sinks this time!
Attachments
Attachments
What a nice guy, thanks Prasi !🙂
Do you perhaps have that in PDF format, I cannot remember, I wonder how this will work with a headphone amp, But I dont think it will drive a 16R load.
Regards
Jan
Do you perhaps have that in PDF format, I cannot remember, I wonder how this will work with a headphone amp, But I dont think it will drive a 16R load.
Regards
Jan
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