The product is a pair of E83cc valves, which are a type of vacuum tube used in electronic equipment such as radios, amplifiers, and oscillators. The valves are described as "Chinese NOS," which likely means they are new old stock from a Chinese manufacturer. These valves would be sought after by collectors or enthusiasts looking to repair or restore vintage electronic equipment that uses this specific type of component. This is for two valves... From a retired collector/ dealer old stock. Lots more available! Will package very safely with bubble wrap and come in a double walled small cardboard box.
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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). Tester Noise (dB) Range -92dB - 0dB.
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The E283CC is a special quality audio double triode. The amplification factor (mu) is, like the ECC83, 100. Tube 1: Ia1= 2.30 mA / Ia2 =2.80 mA. Tube 2: Ia1=2.40mA / Ia2 =2.90mA.
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E83CC ECC83 Valve Tube. NOS, Supplied in White Box. 100% Book Spec = Ia 1.2 - Gm 1.6.
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You are ordering a Matched pair of E83CC tubes. tested (select quantity 1). The JJ Electronic E83CC is a modern-production tube that draws on classic, sought-after designs. Rich, Balanced Tone: Players and audiophiles praise the E83CC for its tonal characteristics.
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Gm matched to about 6% difference, as tested on the Amplitrex AT1000. Identical 1967 date codes. From a small lot of identical tubes. Number E83CC. Small signal (i.e. 12AX7) tubes are generally checked for noise and microphonics; power tubes (i.e. 6L6) are usually not.
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There is nothing wrong with performing that noise test however. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states "Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
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The test graphs are provided inSVG vector format.
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