1 low noise pair) JRP-5687WA and JAN-5687WA Raytheon bronze plates tests like new 1964 era faded printing in white boxes

1 tube) 33.4/36.4ma Gm=10,650/11,300

1 tube) 33.5/33.0ma Gm=11,000/11,250

Good Ma range 30-35ma

Recommended for

Manley

Modwright

Audio Note

Ray Samuels

Ayon

Kondo

Mastersound

Audio Thrills

Loth