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Geary this is a herculian Faraday shielding excercise. I can only imagine that it sounds as good as it looks. This is one massive case for a Cornet 2!
I hope you enjoy the Panasonic TSHA caps as much as I do. They are SMOOTH and that makes for some nice vinyl time. Did you end up using the new EE balast resistors or the ED's like I used. I really like these a lot. They are more similar to the Black Gate measurements than the Nichicons.Your 1.0uf Russian PIO caps work out well in this enlarged case!
Excellent work Geary! I love the wood and aluminum case work. I know you are going to love your Cornet 2. Your case work is exemplary!Cheers!
Nice job, Geary.
When I look at the stuff you guys do who go alone on chassis building it is amazing. Now I see what you did with the LED and how you could get your laces tied together. Impressive can caps. I guess you if you go outside the lines on chassis you can use anything you want. That looks like it was a ton of fun to put together. And this board is a ton of help. Even now looking at your build I see that you used hookup wire with a bit of slack where I used very short hookup wire and picked up some hum. Always helpful, these pictures.Looking at that array of resistors and caps for the RIAA is so familiar now that it looks like a familiar face. Ha! Just noticed you are bypassing with Russian Teflons. Nice aint it?
Nice looking build Geary! It's interesting how when people do a custom build, they all have their different prioirites. You went for superior shielding, myself I went for a major in resonance control and drainage with a minor in shielding using copper plate and ERS cloth. Either way, it takes a helluva a lot of time! I am just about there with my Piccolo and Cornet case builds - I just need to do the final finishing -sanding, oiling waxing etc. This is especially time consuming, as the copper plate takes 5 levels of finishing to get to a mirror finish. I was there on a few pieces, but my three year old son thought I was making too much progress and put a few good scratches in both copper and wood pieces (A nice gouge in my front wood piece - I'm still not sure what I'm going to do about that one...)Beautiful work - enjoy! My Piccolo and Cornet sounded stunning just sitting as a bare circuit borad on the shelf. I can't imagine what they'll sound like with proper shielding, grounding and resononce control. And then there are the planned upgrades to the Piccolo...
I am a big believer in minimizing resonance, especially at the gain levels of a phono stage. That is why I used wood and aluminum together to constrain resonance. The board attaches front and back to MDF braces, not the aluminum shielding. The top and bottom are rather thick aluminum sheet.
QuoteI am a big believer in minimizing resonance, especially at the gain levels of a phono stage. That is why I used wood and aluminum together to constrain resonance. The board attaches front and back to MDF braces, not the aluminum shielding. The top and bottom are rather thick aluminum sheet.Ah yes, I see now - you have created such an elegant solution, I did not even notice it!The combination of wood and metal seems to be a powerful combination of resonance control. I did quite a bit of material research looking for a wood that would excel at turning resonance to heat. I settled on a few choices, but eventually chose wenge as the main wood. It is a bitch to work with, as it is fibrous and tends to pull up. However, this is the very quality that makes it a superior resonance drain. The long fibres (similar to bamboo - another choice, but unable to source) make it a very strong wood. Essentially, all of those space-age hyper expensive damping products made by the likes of SRA, HRS etc. are man-made attempts to mimic wood. Think about a tree, say coconut for example (another choice, which I could not source) - you see a video of these in a hurricane, and they whip back and forth like crazy - providing it stays standing, all of that energy is converted to heat. Can you think of a man-made product that can do that? Carbon fiber, perhaps - check out prices on online metals - it would be a $1000 at least for the materials. My piece of wenge was not cheap - $60, but compared to the carbon fiber? And it looks much better with the brass and copper, which are superior at transferring and draining resonance to the wood.When I tap the copper top plate of my piccolo, there is a dull thunk - no ringing whatsoever. This was my goal!I keep meaning to post pics, but I always think - just a few more days and I'll be finished. One of these days...
