Matched Pair RCA 5879 Vacuum Tubes NOS-Testing June 09 2026 Tube One measured 1690 micromhos

Tube One measured 1690 micromhos and drew 19

34/38 and 38/36 where minimum (65%) is 25/25 is 39/39

These three Sylvania plate number 78 tube were tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 76/73 while Tube Two measured 79/72 where minimum (65%) is 50/50 and 100% is 77/77

Matched Pair RCA 5879 Vacuum Tubes NOS-Testing June 09 2026 Tube One measured 1690 micromhosThis new old stock TESTING, perfectly matched pair of RCA 5879 tubes was tested on our Paul Hart calibrated TV7. for shorts, gas and transconductance. There were no shorts or gas. Both tubes measured 42 where minimum (65%) is 25 and 100% is 35. These tubes have top, O getters; steel support rods and outstanding flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO"