-40%
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE
MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE

MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE

$ 21.1

  • Brand: Tung-Sol
  • Model: 12AX7
  • UPC: Does not apply
  • gtin13: Does not apply

Description

MAXI PREAMP II TESTED TUNG-SOL U.S.A. 12AX7 / ECC83 AUDIO PREAMP TUBE GREY PLATE ***FREE SHIPPING*** TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). THE MAXI PREAMP II TESTS TUBES AT 200 VDC PLATE CURRENT 4 TIMES PER SECOND. Gain(Mu) Section A = 93.6 Gain(Mu) Section B = 94.8 Tester Gain (Mu) Range = 0 - 120 Tester 12AX7 Expected Gain (Mu) value = 92 Transconductance (Gm) Section A = 1670 Transconductance (Gm) Section B = 1579 Tester Gm Range 0 - 9900 12AX7 tubes have a center design target of 1600Gm Noise (dB) Section A = -86.7dB Noise (dB) Section B = -85.7dB Tester Noise (dB) Range -92dB - 0dB TEST RESULTS ARE SHOWN IN PHOTOGRAPHS. While performing an audio tap test on the Maxi Preamp through a guitar amp Triode A tested somewhat microphonic when tapped, Triode B tested good when tapped. I OFFER A 100% REFUND UPON RETURN OF THE ITEM SHOULD IT NOT MEET YOUR EXPECTATIONS OR NEEDS. LOT 1913