-40%
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)
4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)

4 x 12AX7 RCA Tubes*Long Plates-D *Very Strong*(2 Quads Avail)

$ 68.63

Availability: 100 in stock
  • Brand: RCA
  • Custom Bundle: No
  • Return shipping will be paid by: Buyer
  • Non-Domestic Product: No
  • All returns accepted: Returns Accepted
  • Modified Item: No
  • Item must be returned within: 14 Days
  • Type: Vacuum Tube
  • Restocking Fee: 20%
  • Refund will be given as: Money Back

    Description

    4 x 12AX7 RCA Tubes
    Made in USA
    Long Ribbed plates
    D or square getter
    The lettering is smudged/worn/missing
    The auction is for 4 tubes and there are 2 sets of 4 available
    Tested on Enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Ga.
    #1 =
    1450/1650 micromhos @  .65 & .75 mA
    1560/1340
    micromhos @ 1.12 &1.09 mA
    1500/1470
    micromhos @ 1.10 &1.09 mA
    1720/1370
    micromhos @  .84 & .62 mA
    #2 =
    1450/1260 micromhos @  .63 & .59 mA
    1530/1390
    micromhos @  .61 & .79 mA
    1330/1380
    micromhos @  .61 & .62 mA
    1330/1320
    micromhos @  .60 & .60 mA
    Bogey(100%) = 1600/1600 micromhos @ 1.2/1.2 mA  +/- 10%
    The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers.  This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.  A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.
    The test conditions for this listing are
    __
    250
    _Volts plate, __
    250
    _Volts screen, ___
    -2.0
    ___Volts bias or Cathode resistance
    *
    What were your tubes tested at?
    I do combine shipping