Manufacturer Amperex. Tube Code I65 ^ 6E4 / ^ 6G2 (^ = Amperex manufacture code) ^ 6E4 / ^ 6G2= 1966. Number 12AX7 ECC83. T he Tube tested at 91% (2.031 x 45.0 = 91.3 %). 32 = 65% of the value of a new tube.
RARE BRIMAR 12AX7 LONG BLACK PLATE SQUARE GETTER 1954 – Tested EXCELLENT
RARE BRIMAR 12AX7 long black plate angled square getter 1954. Amplifier and AVO Mk4 Tested: Ia 1.05/0.95 GM 2100/2000 = 100+/100%.
1x Brimar ECC82 12AU7 Long Black Plates Square Getter – Rochester 1954 – NOS+
Made in Gt. “Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions.”. The top end is silky and pleasant and doesn’t get rolled off.
NOS+ 1967 Mullard Blackburn 12AX7 ECC83 Low Noise Guitar Amp Tube
Mullard 12AX7 ECC83 I63 B5K3 – Blackburn 1965 Short Plate Genuine Mullard from the Blackburn factory in England, produced in 1965. The etched codes I63 B5K3 mark it as the desirable short-plate version, a favorite among guitar players. This tube tested very strong on the Amplitrex AT-1000 with excellent transconductance on both triodes, no leakage, and zero gas. In a guitar amp it delivers punchy gain, responsive touch sensitivity, and rich harmonic overdrive — exactly what players love in preamp positions like V1 or V2.
Mullard 12AX7 “Hammond” copper post MaxiPreAmp2/TV-7 tested (1) tube lot
TESTED GAIN (91.0, 98.6) MULLARD BLACKBURN FOR HAMMOND 12AX7 / ECC83 TUBE
Tester 12AX7 Expected Gain (Mu) value = 92. 12AX7 tubes have a center design target of 1600Gm. TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). Gain(Mu) Section A = 91.0.
Lot Of 3 HAMMOND by AMPEREX Short Gray Plate 12AX7 / ECC83 Tubes
Removed from working organ. Any questions ask.
NOS Raytheon USA BLACK Ribbed Plate 12AX7A /ECC83 Halo Getter Tube NIB
NOS Raytheon USA. BLACK Ribbed Plate 12AX7A/ECC83 Halo Getter Tube NIB.
NOS Raytheon USA BLACK box Plate 5751 Halo Getter Tube NIB (12AX7 ECC83)
BLACK Box Plate 5751 Halo Getter Tube NIB. NOS Raytheon USA.
Strong Raytheon Long Shiny Black Plate O Getter 12AX7 / ECC83 Tube – 116/124
TESTED STRONG AT:116/124 with a minimum of 70 on the tester. Tube passed ALL tests. This is very important! We strive to make this happen!