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Old 1st February 2015, 08:49 PM   #21
Tubologic is offline Tubologic  Belgium
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Korg already has products including tubes in the audio stage for that "analog warmth" but if it doesn't look (and glow) like real tubes and can't be put behind a small window to attract/impress customers the commercial appeal will be small, not a good marketing idea IMO. (look at Korg's SV-1 below for a good exemple). Maybe the small size, low consumption and low voltages required for the VFD tubes are advantageous for small battery-powered FX-pedals including tubes. It's very unlikely these VFD tubes will be ever offered to the open market/hobbyist community by Korg, or maybe in very limited quantities as spare parts for their products.
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Old 2nd February 2015, 09:04 AM   #22
316a is offline 316a  England
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Sounds like the DM160 indicator tube is very similar in operation to these VFD devices

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Old 2nd February 2015, 07:46 PM   #23
teemuk is offline teemuk  Finland
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Well it should be, because DM160 is the very first VFD tube ever made.

Of course it has a spiral wire anode and isn't "multi-segment" like modern VFD displays.
 
Old 9th June 2016, 03:19 PM   #24
ystkkmkr is offline ystkkmkr  Japan
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Datasheet published.

http://korgnutube.com/pdf/nutube_datasheet.pdf
 
Old 9th June 2016, 03:30 PM   #25
DF96 is offline DF96  England
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Given a CCS load, that looks quite linear!
 
Old 9th June 2016, 06:22 PM   #26
IceFyre13th is offline IceFyre13th  United States
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Location: AZ, you know where the car audio companies are.
Nutube – English | korgnutube.com – English

Has its own site now too!!!
 
Old 9th June 2016, 06:25 PM   #27
MrCurwen is offline MrCurwen  Finland
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Now I want to make a battery operated portable amp with these using my favourite balanced tube circuit!
 
Old 11th June 2016, 02:18 PM   #28
Tubelab_com is online now Tubelab_com  United States
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I don't know if mere mortals (or small companies) will ever have access to these but there are a couple of key specs that does make them quite different from "old" tubes.

Maximum plate dissipation 1.7 MILLIWATTS, can't red plate this one.

Plate voltage is 5 to 80 (max) volts.

Anode current 10 to 34 microamps.

Mu is 12.

Gm is 40 uA.

Positive grid voltage is required for most applications, but grid current is less than 14 microamps, which is almost as much as the plate current.

No word about microphonics, but it is a DHT with a suspended filament. I still think it could be useful for a preamp mounted inside the guitar. A two stage tube preamp operating both sections at the maximum ratings would consume less than 30 milliwatts including both filaments! The curves look quite linear especially when operated near the maximum ratings.
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Old 11th June 2016, 07:11 PM   #29
hpeter is offline hpeter  Slovakia
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i dont want to pee on their parade, but..
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Old 18th July 2016, 10:04 PM   #30
Koifarm is offline Koifarm  Netherlands
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Some more data. Just ordered 2 pieces.
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