Trio RCA Gray Glass 12BY7 12BY7A Vacuum Tubes Valves 6AR6WA Milspec These tubes have excellent frequency

These tubes have excellent frequency response

72 and 76 where minimum (65%) is 45

Brands are indicated on the boxes

new in box RCA 6BK4 / 6BK4A tubes tested to spec on our Paul Hart-calibrated TV7/U

Trio RCA Gray Glass 12BY7 12BY7A Vacuum Tubes Valves 6AR6WA Milspec These tubes have excellent frequencyThis trio of RCA gray glass 12BY7 12BY7A tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 55 while Tube Two measured 60. Tube Three measured 62. (Minimum (65%) is 46. 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