Telefunken ECH81 Vacuum Tube NOS-Testing

Telefunken ECH81 Vacuum Tube NOS-TestingThis new old stock TESTING Telefunken ECH81 6AJ6 was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. It measured 75 79 where minimum (65%) is 50 50 and 100% is 77 77 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

This new old stock-testing Svetlana 6550B / 6P27 perforated plate output tube was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -48 volts for shorts

It measured a perfectly-balanced 51/51 where minimum (65%) is 40/40 and 100% is 62/62

THERE WILL BE NO REPLACEMENTS FOR LOST PACKAGES

3 rather than 12

This matched pair of Raytheon black glass 6V6GT output tubes was tested on our Maxi-Matcher 2 at real operating voltages of 400 volts on the plates and a bias of -36 volts for shorts

but most should work in most circuits

This RCA 6BZ6 tube -- and two others just like it -- tested to spec on our Paul Hart-calibrated TV7/U

They have side

These five 26E5 tubes were tested (as 25 volt 6CM6s) on our Paul Hart-calibrated TV7/U for shorts

Selections include "I Go The Road Alone

Transconductance measured a nicely-balanced 62/60 where minimum (65%) is 56/56 and 100% is 87/87

not included) as I write and they sound great