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(!!) (Good Value Single) 12AX7=ECC83 Telefunken Germany <> bottom ribbed plates used/very good 1960 era (Gm=1300/1400 and 1.1/1.1ma)
(!!!!!) (Best Single #3) ECC83=12AX7 Telefunken Germany ribbed plates used/tests like new 1953-1955 (1.3/1.1ma and Gm=1700/1600) 1-5% section balance
(!!!!) (Best Single #2) ECC803S=12AX7 Telefunken Qualitex Ulm Germany <> bottom like new 1964 (1.3/1.5ma and Gm=1600/1800)
(!!!!) (Best Single 1956) ECC82=12AU7 Siemens Halske "Long Ribbed Plates" and large/wide "U" getter branded Haltron 1956 (10/9.2ma) (k62 series) (High Gm) (rare)
(!!!!) (Best Single #2) ECC81=12AT7 Telefunken Germany <> bottom NOS 1960's faded printing (8.8ma/9.8ma) (mic grade)
(!!!!!) (Best Single 1959) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates NOS 1959 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (7ma/11ma) (recommended for mic)
(!!!!) (Best Value Single) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates branded GAP/R Computor tube used/good 1956 (Gm=1400/1500 and 0.8/0.9ma) 1-5% section balance
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (9ma/6.5ma) (recommended for mic)
(!!) (Best Value) ECC83=12AX7 Telefunken Germany <> bottom smooth plates used/tests like new 1960's faded printing (Gm=2000/1700 and 2.0/1.3ma)
RL12P35 Telefunken Germany Wehrmacht NOS 1944 (120ma) (tested on Amplitrex)
(!!!) (Good Value Single) 12AU7 Philips Australia NOS 1965 (8.5/8.0ma) (same internals as Holland made)
(!!!!!) (Best Single #1) 12AU7 Philips Holland NOS 1968 "O" halo (11.2/12.2ma) (same Gm) (sweet sound)
(!!!!) (Best Value Single) 12AU7 Philips Miniwatt Holland like new 1961 large "O" getter halo (9.6/11ma)
(!!) (Single) ECC82=12AU7 Philips Holland NOS 1969 faded printing (11/10ma)
(!!) (Best Value Single) 12AX7 EI Yugoslavia Marshall Smooth Plates TELEFUNKEN copy NOS 1970's (0.7/0.6ma and Gm=1400/1300)
(!!!!) (Best Pair 1960-1962) ECC82=12AU7 Philips Miniwatt Holland NOS 1960-1962 (9.2/10.4ma and 8.8/10.2ma) (sweet sound)
(BEST PRICE) RL12P35 Telefunken Germany Wehrmacht NOS 1940's (4 for $299.99)
RL12P35 Telefunken Germany Wehrmacht NOS 1944 (118ma) (tested on Amplitrex)
(!!!!) (Recommended Single) E188CC=7308 Telefunken <> bottom gold pins used/good 1969 era (13.2ma/14.8ma) (rare)
