Originally built as a premium, ruggedized version of the 12AX7, the 7025 was specifically selected for the lowest possible microphonics and hum, making it the top choice for critical audio applications.
Item Tag: 12AX7
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Balanced NOS RCA 7025 Short Gray Plates Halo Getter NIB Cond Tests NOS Amplitrex
Tested on an Amplitrex AT1000. Balanced NOS RCA 7025 Preamp Tube | Short Gray Plates | Halo Getter | NIB Condition | 1968 Production.
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12AX7 ECC83 SINGLE TUBE VERY RARE TAIWAN VIDEON 1960s 1700/1700 (106%/106%)
12AX7 / ECC83. RARE TAIWAN MADE 12AX7. During the 1960s and 1970s, major global electronics corporations set up offshore facilities in Taiwan to capitalize on low labor costs, shifting mass production there from the US and Japan.
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HIGH GM (1841, 1737) BRIMAR ENGLAND 12AX7 / ECC83 TUBE SHORT GREY PLATE HALO
While performing an audio tap test on the Maxi Preamp through a guitar amp Triode A tested good when tapped, Triode B tested excellent when tapped. Tester 12AX7 Expected Gain (Mu) value = 92. 12AX7 tubes have a center design target of 1600Gm.
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ECC82 12AU7 Brimar Black Plates Red Tip Selected Pair
Very rare Brimar selected red tip matched pair 12AU7 tubes with black plates and top [ ] getter made in the 1950’s. Tubes tested: 99.3/102.4, 106.4/100.5.
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NOS/NIB RCA 12AX7/ECC83 TWEED BLACKFACE FENDER 1969 TEST NOS
MATCHED PAIR NOS/NIB 12AX7/ECC83 MARSHALL PLEXI TWEED FENDER 1969 TEST NOS. Nice Shiny Getters Both marked DB Condition is “New”. Shipped with USPS First Class. All of our tubes are tested by our resident expert on a Hickok model 605 tube tester.
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RARE MULLARD NOS/NIB 12AX7/ECC83 MARSHALL PLEXI TWEED FENDER 1967 TEST NOS
RARE MULLARD NOS/NIB 12AX7/ECC83 MARSHALL PLEXI TWEED FENDER 1967 TEST NOS. Condition is “New”. Shipped with USPS First Class. All our tubes are tested in house by our resident expert on a Hickok 605 tube tester as pictured.