cmq I tried the 25 volts, and it's fine no noise very quiet bass very beautiful
and who expected such a sound !! it's gorgeous, this sounds almost better than my home amps.
and who expected such a sound !! it's gorgeous, this sounds almost better than my home amps.
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A few pictures of your build would be really helpful.
Anyway here's my schema and PCB, works pretty well. The relay is optional but avoids the very loud turn-off thump.
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I went through those links. You do not want to build this on a breadboard. At least a veroboard with tight component spacing and very short paths, as short as possible. I prefer using SMD as long as I can see them for this reason, it also simplifies layout. The 1875 is not the most stable chip at the best of times and needs babysitting. A breadboard is asking for disaster.
Hi, why did you choose 10ohm as zobel resistor instead of 1R? Was there a reason?
I haven't seen any stability with 10 ohms and this specific layout and component set. But then my input and feedback arrangements are very different too.
Also, I have a boatload of these 2W SMD resistors, so I tend to use them in all zobels. There is a case for lowering them in some instances, but I haven't encountered any yet.
The one thing I haven't included is the output inductor, which is soldered to the output jacks, as far away from the PCB as possible.
When in doubt, stick to the datasheet values.
Also, I have a boatload of these 2W SMD resistors, so I tend to use them in all zobels. There is a case for lowering them in some instances, but I haven't encountered any yet.
The one thing I haven't included is the output inductor, which is soldered to the output jacks, as far away from the PCB as possible.
When in doubt, stick to the datasheet values.
I haven't seen any stability with 10 ohms and....
I think you meant 'instability', writing error probably. What should be the wattage of that resistor? Is 1R 1W enough here? Power supply will be +/-24vDC(34v CT) and i'll use output thiele network(1.5ohm with 1uH inductor). Anyway thanks 🙂
Sorry, I meant stability issues.
I use 2W minimum for a Zobel, if going for lower resistance it needs to be upped to 3W or 2x2W in parallel.
I use 2W minimum for a Zobel, if going for lower resistance it needs to be upped to 3W or 2x2W in parallel.
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