(!!!) (Recommended Pair) 6GK5=6FQ5A Toshiba Japan rebranded Raytheon NOS (8.7ma and 9.7ma)
$ 27.99
1 pair) 6GK5=6FQ5A Toshiba Japan rebranded Raytheon NOS 1970 era
1 tube) 8.7ma Gm=12,300
1 tube) 9.7ma Gm=13,000
Tested on Amplitrex
Good Ma range 9-11ma
Good Gm range 13,00-15,000
- Conrad Johnson Premier 10, 14 preamp and DAC
- Supratek
- Wright
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