Korg Nutube 6P1 Dual TriodeThe Korg Nutube 6P1 is a new, miniature, low power dual directly heated triode device. It was developed by Korg (of musical instrument fame) and Noritake Itron, a manufacturer of vacuum fluorescent displays, in Japan. Although it is a true directly heated triode, it is manufactured differently than traditional vacuum tubes, which gives it some unique attributes. Electrically, the Nutube 6P1 is somewhat comparable to the battery powered hearing aid

The TU-8150 is the little brother to the TU-8200 and allows for both tube and opamp rolling so you can have fun tuning the sound to suit your own listening preferences

3 year warranty

This project is an effort to assemble these elements into a discrete gain stage that can be used as the front end for modest power amplifiers or as a general audio gain circuit

under tension

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Another circuit example is shown in Figure 5 below

The First Watt F8 is yet another incredible amplifier from Nelson Pass

Fully compatible and optimized for the Deluxe Chassis to allow easy installation on the base

The Universal Power Supply PCBs allow the experienced DIYer to choose every part of their PSU or use what they have in their spare parts bin

It is a drop-in replacement for many dual opamps:

160F for a typical build

Filament Voltage