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(!!!) (Best Pair) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (10ma and 10.4ma) (same Gm)
(!!!) (Best Single) EL60 Philips Holland metal base NOS 1958 in white box (91ma)
(!!) (1 Pair) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (11.2ma and 11.3ma)
(!!) (1 Pair) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (8.6ma and 9.0ma)
(!!) (1 Pair) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (8.8ma and 9.4ma) (same Gm)
(!!) (Read Review) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (11.2ma and 11.2ma) (close Gm)
(!) (sold out) F2a Siemens NOS 1960's (112ma) Tested on Amplitrex (sold out)
(READ REVIEW) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (10ma and 10.6ma) (Same Gm)
6AS7GA Sylvania metal base NOS 1960's (77/87ma)
6SH7GT Raytheon NOS 1940's (9.5ma)
Deforest Audion metal base display tube 1920's (single)
EL34 Holland brown base used/good faded top getter 1961 (78ma)
F2a Siemens defective