SKU:27764455679
Matched Pair CBS Hytron 12SN7 12SN7GT Vacuum Tubes Black T Plates
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
Description
Matched Pair CBS Hytron 12SN7 12SN7GT Vacuum Tubes Black T PlatesThis matched pair of CBS Hytron 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 75 70 for Tube One and 77 72 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have black T plates; D getters; steel support rods; excised chevrons in their top mica spacers as well as 210 5439 and 5413 provenance date codes, respectively. I have
there are a few scratches
RCA-MANUFACTURED) where new/nominal is within one standard deviation of 1900
new in box (for Tube One) matched pair of Sylvania 5879 tubes was tested on our Paul Hart-calibrated TV/U for shorts
Minimum (65%) is 33 and 100% is 51/51
IN OVER 6000 SALES
but the bottle is firmly-cemented to it and there is no movement at all possible
These seven 6A6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts
new in box GE 6AS8 tubes tested to spec on our Paul Hart-calibrated TV7/U
There were no shorts and the final three tubes on the right might be a bit gassy
It measured a nearly-perfectly-balanced 84/82 where minimum (65%) is 50/50 and 100% is 77/77
THE PRODUCT DEVELOPMENT AND IMPROVEMENT CYCLE IS OVE
only six tubes are available
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