(!!!!) (Best Pair #2) 5963 RCA and RCA Beckman NOS ribbed plates 1960-1965 (9.4/9.2ma and 9.4/9.4ma) 1-2% matched (Same Gm)

1 low noise pair) 5963 RCA NOS ribbed plates 1960-1965 

1 tube) 9.4/9.2ma Gm=2200/2200 RCA Beckman 1960
1 tube) 9.4/9.4ma Gm=2200/2200 RCA

(5963=computer rated 12AU7)

- Bottlehead Forplay III

- CAT SL-1L

- Wavelength Sine