3 RCA Number Type 37 #37 Vacuum Tubes Valves Black Plate ST Shape Lot Of Three London International copper support rods and excellent

copper support rods and excellent flashing

GM-BRANDED 6SK7 tested as good on our Paul Hart-calibrated TV7/U

milspec GE JG-6X4WA tested to spec on our Paul Hart-calibrated TV7/U

The spine is in fine shape with no loose pages and the dust jacket has only a few

3 RCA Number Type 37 #37 Vacuum Tubes Valves Black Plate ST Shape Lot Of Three London International copper support rods and excellentThese three RCA Type 37 triodes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 23, 31 and 39 where minimum (65%) is 23. They have black plates; dimpled sheet getters; old fashioned, coke bottle shape glass envelopes and terrific flashing. 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