3 RCA Number Type 37 #37 Vacuum Tubes Valves Black Plate ST Shape Lot Of Three London International These milspec Ken-Rad JAN-CKR-6L7 tubes

These milspec Ken-Rad JAN-CKR-6L7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box RCA 6DS4 nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

They have 4-39 188-5 and 3-43 188-5 date codes/EIA code

copper support rods and excellent flashing

These nine National Union number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

3 RCA Number Type 37 #37 Vacuum Tubes Valves Black Plate ST Shape Lot Of Three London International These milspec Ken-Rad JAN-CKR-6L7 tubesThese 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