3 RCA Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Three Max Steiner Both are acid-etched

Both are acid-etched

I have listened to all four LPs

These four RCA and Cunningham number / type 27 tubes tested as low goodand good on our Paul Hart-calibrated TV7/U

Both tubes have gray

3 RCA Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Three Max Steiner Both are acid-etchedThese three RCA plate number 78 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 32, 44 and 52 where minimum is (65%) is 36 and 100% is 55 and 100% is 55. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST OF THE TUBES WE