Tournesol has been banned. I will contact Alex to see what is going on. I will let you know one way or the other. Thanks
This amp looks very good, however it should be retested with IRFP240 , IRFp9240 as the other FETs look to be unobtainium.
The best spec here is the clipping characteristics, It comes out of 10khz sine clipping perfectly.
The best spec here is the clipping characteristics, It comes out of 10khz sine clipping perfectly.
Perhaps former member Tournesol is not-banned and actively participating in other internet discussion groups, under a different username. If you discover him elsewhere, you could inquire whether he continues to make progress towards completing the design and construction of a Pizzicato amplifier.
good luck to him, i always suspected him to be Esperado another banned member, although i have no proof, just a hunch....
ECF10N20 Metal Lateral MOSFET | Profusion
ECF10P20 Metal Lateral MOSFET | Profusion
1000+ and 200+ in stock - exact replacements. Just more DS Voltage.
I spoke via Email with Alex. He is not on the project anymore. I have not heard from Tournesol at all. So what if anything do think should happen from this point forward? I am open to suggestions.
I have some time due to lock down. I can offer views on prototyping effort. No noise, just engineering.
A plan yes. A date to test may be looking too far ahead. This is one of those projects that is not guaranteed to work.I would recommend backing up a bit from the PCB. Some may wish to go straight to the PCB stage in order to advance. However, I place some importance on understanding the behavior of what has been formulated. In this case the input stage is slightly different and getting a grasp of how it works thermally is going to feed into future work.
With that in mind, I would initially bread board with discrete non-matched transistors which was my initial suggestion. The purpose of this would be to determine where the design concept breaks and how closely a match of transistors is required. The power devices do not need to be included as feedback can taken from the driver stages and a lower voltage version can built for concept test as well.
Of course you can opt for the PCB and see what gives. Since a lot of work is falling on your shoulders, you can direct others to give you what you need.
With that in mind, I would initially bread board with discrete non-matched transistors which was my initial suggestion. The purpose of this would be to determine where the design concept breaks and how closely a match of transistors is required. The power devices do not need to be included as feedback can taken from the driver stages and a lower voltage version can built for concept test as well.
Of course you can opt for the PCB and see what gives. Since a lot of work is falling on your shoulders, you can direct others to give you what you need.
Give me a schematic and parts list of the testing bread board that you want to test. Also a testing setup and such. I have a scope and other test equipment. Or I can build it send it out. What suits you. Thanks
I have lost track of the last version proposed for a build. Could you post this so that we start from a known point and the test version can be extracted from that.
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Tournesol said,in the first post of the thread that the last version was the one in post #428
Pizzicato #428
Toiurnesol said, in the first post of the thread that the definitive version was in post #428.
Pizzicato #428