Telefunken ECH81 Vacuum Tube Valve Hytron Triple 3 Mica Tube One measured 72/74 while

Tube One measured 72/74 while Tube Two (Zenith-LABELED) measured 74/73 where minimum (65%) is 50/50 and 100% is 77/77

50 and 58 where minimum is (65%) is 36

This new old stock-testing matched pair of RCA 12B4 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

There were no shorts or gas and it measured 40/37 where minimum (65%) is 32/32 and 100% is 49/49

This quad of Canadian-MANUFACTURED type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Telefunken ECH81 Vacuum Tube Valve Hytron Triple 3 Mica Tube One measured 72/74 whileThis Telefunken ECH81 6AJ6 was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. It measured 70 59 where minimum (65%) is 50 50 and has the Telefunken diamond (<>) embossed in its base. 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" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE