Nutube.US  Your online source for the Korg Nutube

Nutube.US is an authorized, independent distributor of the Korg Nutube.  We also design and manufacture evaluation hardware and other products for the Nutube.

For additional information about the Nutube, please visit

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The Korg Nutube 6P1 is a newly developed, low-power directly heated dual triode vacuum tube.

It was developed by Korg, the musical instrument maker, and Noritake, a manufacturer of vacuum fluorescent displays, in Japan.

Nutube.US is now making the Nutube 6P1 available for purchase in small quantities to experimenters, DIY'ers, and small OEMs!


New!  The Nu:Tekt HA-Kit headphone amp kit from Korg!

Details are here...


Nutube 6P1 Dual Triode

6P1 datasheet Version 32 (PDF file)

6P1 Application Notes (on Korg Nutube web site)

FAQ (on Korg Nutube web site)

Price: $49.99 each - contact us for discounts on orders of 5 or more pieces

Buy online now via the Nutube.US eBay store



Korg Nutube Evaluation Board

This is the official evaluation board for the 6P1, made by Korg  It includes a Nutube 6P1 mounted on a carrier PCB.

Download user manual (PDF file)

Price: $150.00 each


Nutube Carrier PCB (unassembled)

This board provides a convenient way to mount the 6P1, either to a chassis, or to a standard 0.100" centers perfboard for easy prototyping.  This is supplied as a bare PCB without the 6P1 installed.

Download schematic and dimensions (PDF file)

Price: $5.99 each

Buy online now via the Nutube.US eBay store


Nutube Carrier PCB (assembled)

This is the carrier board shown above, with a 6P1 and pin headers (the type that mate with IC sockets) installed.  This is the same as the carrier that ships on the evaluation board, if you need an extra.

These can also be supplied with 0.025" square headers, or with no headers at all, on request.

Price: $59.99 each

Buy online now via the Nutube.US eBay store


Here are some Nutube DIY projects that are available on

Nutube Balanced Preamp /  Headphone Amplifier

A truly differential balanced amp circuit using the Nutiube.  More details at


Nutube hybrid class-D Amplifier

A 50 watt class-D hybid speaker amp using the Nutube.  More details at


NuHybrid DIY Headphone Amplifier

An easy DIY headphone amplifier using the Nutube.  More details at


Nutube DIY Stereo Buffer

A simple stereo buffer using the Nutube.  Details at