(!!!) (Recommended PAIR) 6JB6A RCA NOS 1970 era same build (74ma and 80ma) (DRAKE)

1 pair) 6JB6A RCA NOS 1970 era same build 

1 tube) 74ma Gm=7200 RCA branded Philips

1 tube) 80ma Gm=7600 RCA

Good Ma range 60-75ma

Good Gm range 6500-7500
 

6JB6A specs: (6.3V @ 1.2A, Gm=7100, Watts=17.5)

recommended for:
Drake T4XB HF Transmitter
Drake T4XC
Drake TR4CW