International 6LF6 6MH6 Beam Power Compactron Vacuum Tube Valve NOS NIB

International 6LF6 6MH6 Beam Power Compactron Vacuum Tube Valve NOS NIBThis new old stock, new in box International 6LF6 6MH6 tube tested to spec on our Paul Hart calibrated TV7 U. 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 ANY QUESTIONS. 1. MOST OF THE TUBES WE SELL ARE OVER 70 YEARS OLD. WE CANNOT GUARANTEE FOR FAILURES AFTER POWER UP AS THERE IS NO WAY

Their internal structures are all the same

dimple getters

rectangular mica spacers

These tubes are very-well-built and extremely-rugged

but I do not know its operating voltage

(New US-made 6BG6s typically test with plate current from the mid 20s to mid 50s with transconductance within a standard deviation of 2300 micromhos or so

new in box US-made 35Z3 tubes in this lot

Converter 12BE6

Both measured 62 where minimum (65%) is 34

This new old stock-testing matched pair of milspec / industrial GE JG-5814A / 12AU7A dual triodes was tested on our Maxi Preamp II for shorts

There were no shorts or gas and they measured 52/52

They struck at 38