6 US-Made Number Type 43 #43 Vacuum Tubes Valves Lot Of Six T08o 280 739 and F1 date

280 739 and F1 date codes

64 and 64 where minimum (65%) is 50 and 100% is 77

They were dead quiet when the preamp was muted and had excellent frequency response

industrial-grade GE triple mica 6201 (12AT7 / ECC81) dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

6 US-Made Number Type 43 #43 Vacuum Tubes Valves Lot Of Six T08o 280 739 and F1 dateThis lot of six US made type 43 tubes was tested our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 44, 44, 74, 76, 82 and 85 where minimum (65%) is 58 and 100% is 89. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY HAVE IT. PLEASE ALSO SEE OUR ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR