3 US-Made 1H4 1H4G Vacuum Tubes Lot Of Three NOS-Testing 6B10 Compactron This matched pair of Sylvania

This matched pair of Sylvania 6BL7GT dual triodes was tested on our TV7/U for shorts

Transconductance was 1670 for Tube One and 1570 for Tube Two where new/nominal is within one standard deviation of 1900

It comes with a nice band and has a 17 jewel AR-18 in-house-made movement which is in excellent shape with no oxidation or water damage

This trio of US-made 6CM7 tubes was tested on our Paul Hart-calibrated TV7 for shorts

3 US-Made 1H4 1H4G Vacuum Tubes Lot Of Three NOS-Testing 6B10 Compactron This matched pair of SylvaniaThese three new old stock testing US made 1H4G tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas and they measured 30, 32 and 35 where minimum (65%) is 23 and 100% is 35. 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