1 low noise tube) 5687WA Tungsol bronze plates "O" getter halo used/very good 1961 - faded printing in white box

1 section) 33.4ma Gm=10,200

1 section) 34.8ma Gm=10,600 

Recommended for

Manley

Modwright

Audio Note

Ray Samuels

Ayon

Kondo

Mastersound

Audio Thrills

Loth