I've got 6 x RCA 5751 black plates. All are slightly used. Bought them some years ago when I was new to tubes. Over time I accumelated too many tubes ad these are some that have to go. (need the cash)
These were meassured in a Shell Electronics Test-O-Matic tube test under the 12AX7 setting, so the reading is a little lower than actual. There is no setting for 5751 tubes on my this tester.
The tubes meassured:
88/87
90/90
87/88
90/89
91/89
90/89
Tube is $ 25 a piece plus shipping
