-40%
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100
1 EA NOS GE 12AY7 Tube Amplitrex Tested 100

1 EA NOS GE 12AY7 Tube Amplitrex Tested 100

$ 20.05

  • Brand: GE
  • MPN: 12AY7
  • Model: 12AY7
  • Type: Vacuum Tube

Description

TESTED BALANCED GAIN (39.7, 40.2) GE 12AY7 AUDIO TUBE GREY PLATE HALO GETTER ***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 = 39.7 Gain(Mu) Section B = 40.2 Tester Gain (Mu) Range = 0 - 120 Tester 12AY7 Expected Gain (Mu) value = 40 Transconductance (Gm) Section A = 1430 Transconductance (Gm) Section B = 1442 Tester Gm Range 0 - 9900 Noise (dB) Section A = -88.0dB Noise (dB) Section B = -86.8dB Tester Noise (dB) Range -92dB - 0dB While performing an audio tap test on the Maxi Preamp played through a guitar amplifier both triodes A & B tested somewhat microphonic when tapped. TEST RESULTS ARE SHOWN IN PHOTOGRAPHS. I OFFER A 100% REFUND UPON RETURN OF THE ITEM SHOULD IT NOT MEET YOUR EXPECTATIONS OR NEEDS. LOT 1909