Page 244 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

FIGURE 11-7 A 12AU7 triode tube.

This device is a vacuum tube (a double triode). The vacuum tube is a device largely made
redundant by transistors and integrated circuits (ICs) but retaining a niche role in audio amplifier
design, where it is used by audiophiles for the low-frequency even harmonic distortion that many
people find gives an attractive color to music.

It is not a total surprise that this device is not currently included in the libraries that ship with
EAGLE, so we will make our own part for it, especially because I intend to make myself a preamp
using this device and would like to design the PCB using EAGLE.

You can find the datasheet for this tube at www.wooaudio.com/docs/tube_data/12AU7.pdf.
The steps involved in making this part will be

1. Make the package.

2. Make the symbol.
3. Make the device to link the two together.

Making a Package