(!!!) (Best RCA single #2) 5687 RCA bronze plates NOS 1976 (31.5/34ma)

1 low noise tube) 5687 RCA bronze plates NOS 1976

1 section) 31,5ma Gm=11,000

1 section) 34.0ma Gm=12,000

Good NOS mA range 30-35ma

Recommended for

Manley

Modwright

Audio Note

Ray Samuels

Ayon

Kondo

Mastersound

Audio Thrills

Loth