3 US-Made 6AC7 Vacuum Tubes Lot Of Three March 09 2023 They are dead quiet when

They are dead quiet when just the amplifier is running and have excellent frequency response

The spine is in fine shape with no loose pages and the dust jacket is also in good shape

The dust jacket is in nice condition

Transconductance measured 21

3 US-Made 6AC7 Vacuum Tubes Lot Of Three March 09 2023 They are dead quiet whenThis lot of three US made 6AC7 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 42, 43 and 44 where minimum (65%) is 30 and 100% is 47. 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