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Post by joethearachnid on Sept 14, 2021 23:41:55 GMT
I've been itching for a new electronics project recently and have been looking around for something that looks interesting and different to anything I currently have. I saw that Pete Millet recently posted a design for a DIY version of his Sangaku amp that uses the Korg Nutube and I'm very curious:
There's some reviews and feedback on the commercial version of the amp, most of it good but not a lot of it overall, possibly given the original $2000 price and the fact that it seem like it wasn't produced for long. Criticism seems to be mostly on the microphonics of the nutubes which seems to have been solved in the DIY version. Given that the nutubes are some ~£53 each plus the cost of the board and custom tube extensions, the ~£150 for the kit on eBay seems fairly reasonable. Any thoughts on the design? I think something with a glass or acrylic panel that lets you see the glow of the nutubes could be pretty stunning.
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solderdude
Administrator
measureutternutter
Posts: 4,881
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Post by solderdude on Sept 16, 2021 19:39:07 GMT
I've been itching for a new electronics project recently and have been looking around for something that looks interesting and different to anything I currently have. I saw that Pete Millet recently posted a design for a DIY version of his Sangaku amp that uses the Korg Nutube and I'm very curious: There's some reviews and feedback on the commercial version of the amp, most of it good but not a lot of it overall, possibly given the original $2000 price and the fact that it seem like it wasn't produced for long. Criticism seems to be mostly on the microphonics of the nutubes which seems to have been solved in the DIY version. Given that the nutubes are some ~£53 each plus the cost of the board and custom tube extensions, the ~£150 for the kit on eBay seems fairly reasonable. Any thoughts on the design? I think something with a glass or acrylic panel that lets you see the glow of the nutubes could be pretty stunning.
I have no experience with these tubes. They come across more like a novelty using tech used in displays than a serious attempt. The cathode/heater wires are tensioned and suspended in the air. The grid isn't as securely fastened as a grid in a regular tube. I see no advantages other than somewhat lower heater current and the novelty part of it
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