Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: shooter on September 05, 2017, 08:31:47 pm
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My son ask me check this out, I read the blurbs, has anyone played through an amp with this?
http://www.korg.com/us/news/2015/012212/ (http://www.korg.com/us/news/2015/012212/)
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No, I haven't played with anything related to the nutube. It's the kind of thing I would generally ignore as 100% gimmick. But Pete Millett, a mostly hi-fi tube guy who done a lot of interesting stuff over the years, seems to be the US agent for this "new" tube technology. At $49 a piece, it's a pretty expensive "tube".
See http://www.nutube.us/ (http://www.nutube.us/)
Pete Millett's website http://www.pmillett.com/index.html (http://www.pmillett.com/index.html)
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thanks for the link.
I think it might wind up in my next build, or the one after :laugh:
Stole this quote from the millet site;
"An FFT under these conditions shows typical single-ended triode characteristics."
I looked at the last FFT I had, (pse 6V6), and they line up nice!
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Several months ago, there was a discussion on the forum regarding this technology.
I can see some uses, like a DI, or V1 on an amp.
Look at the specs, low power output.
I like the direct cathode on the unit. Matter of fact, the diamond crystal technology, would make direct heat cathode a little more appealing. (Still trying to figure out how to degas the tube, without oxidizing the diamonds.
under the right conditions, I can see multi-watt power tubes feeding an OT,
Its cousin is the display on your microwave.
Is it the future, oops I just dropped by crystal ball, and smashed the chip.
Would like to see some applications a quick web search did not show any.
No hum no buzz that you don't need, Korg's Nutube is bad as class D. [certified heater filament free] (sung to Alcapulco Gold tune)
I pulled a a data sheet from November 2016, converted to 150 dpi and bw, for download. can this chip replace a 12ax7 on those tube pedals.
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V1 on an amp. Look at the specs, low power output.
That's where my brain went, a nice "black blackbox" pre-amp, 2 chips, 2 channels, 1 chip, TS driver n recovery.
I was in my "creative" state of mind so things like full height 31/2" slide in disk trays, only for amps were hopping outta the smoke :icon_biggrin:
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FWIW, there are some products on the market utilizing the technology. Google/YouTube the Vox MV50 line. They're still hybrid amps, but they don't sound half bad.
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YouTube the Vox MV50
thx, that's how this began for me, my Son is a resent Vox convert, from fender twin, It only took him 15 years :think1:
I like electronics in all it's forms, especially the one's you see in the side shows :icon_biggrin:
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> the future?
The past.
Remember the 1990s? Among other nostalgia, many microwaves and VCRs had a glowing display which was not LEDs. It was VFD, Vacuum Fluorescent Display. Electrons and phosphors. The particular thrill is that segments, letters/numbers, and even logos and words ("Delco", "popcorn") could be stamped into the phosphor plate at low added cost.
They lingered a long time. I have a cheap 2014 microwave uses one. But LEDs and LCDs ate the market. A large factory has been closed.
Apparently KORG got in, got the small-run prototype line left running. With low-cost mods, it "is" a vacuum tube.
An incredibly pathetic vacuum tube. Makes the '01 look like a champ. (Well, the NuTube filament power is microscopic.)
So pathetic that I don't think it in any way replicates our Good Old Tubes. And costs a heck of a lot more. (It should be $5, not $50; I'm sure KORG's invoice for a crate is a lot lower than our retail price.)
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The past.
After competing in the Navy for that "final school" I made the cut, and got to learn n work on "the 1st Digital Radar". The 1st day I asked, why nixies and not LED display?, the reply, we use IC's to drive them :think1:
Thanks for the council, I'll save my money for future endeavors
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Ditto to PRR. It has a mu of only 12. And with a plate resistance of a whopping 300K, it will need a tube buffer. :l2:
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> tube buffer
IIRC, the app-note suggests a JFET or an op-amp??
But yeah.... it is so lame it can hardly drive another grid/gate.
AND to get that far you have to smack the input into Positive Grid mode. It isn't a large grid current, but enough to load-down guitar or most g-amp interstage networks.
At $5 it could have uses. At $50 asking price, I'd rather buy some nice sneakers that will do a lot more work than a Nu-Tube.
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> the future?
The past. ....
Future of the past? :icon_biggrin:
Add a few IC's and op-amps, we have very low power class D amps, being played Jiminy Cricket. 90% efficent, with a battery smaller than a 16 penny nail head. add blue tooth
Grab that bass speaker that amplifies phones, and we have a wireless amp about the size of a coffee pot. :l2:
maybe we can build a few and get on shark tank.
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Future of the past?
:icon_biggrin:
I like it!, is that now? :icon_biggrin: