Matched Pair RCA 12SN7 12SN7GT Vacuum Tubes 6097 new in box Zenith 25Z5
$21.76
Description
new in box Zenith 25Z5 tubes tested to spec on our Paul Hart-calibrated TV7/U
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Matched Pair RCA 12SN7 12SN7GT Vacuum Tubes 6097 new in box Zenith 25Z5This new old stock testing matched pair of RCA 12SN7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 76 69 for Tube One and 77 74 for Tube Two. Minimum (65%) is 50. They have black plates; tall bases; D getters; steel support rods and KR and MC date codes, respectively. I am playing them as I write in my Alan Eaton single ended 45 amplifier with
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