Matched Quad RCA 6CL6 Vacuum Tubes Valves RCA Victor LSP-4717

Matched Quad RCA 6CL6 Vacuum Tubes Valves RCA Victor LSP-4717This matched quad of RCA 6CL6 tubes were tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured (From left to right): 42, 42, 42 and 45 where minimum (65%) is 30. 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 OR HAVE ANY

Please note Tube Two’s centering pin is missing

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

This pressing has light surface noise audible in quiet passages and barely audible in voice-level passages

This new old stock-testing Sylvania 6L6GC was tested on our Maxi Matcher 2 for shorts

They tested 50/38

Both tubes have thin cracks in their bases

new in box Sylvania 9JW8 / PCF802 tube tested to spec on our Paul Hart-calibrated TV7/U

These ten new old stock

This tube has anode radiators for cooler operation and longer tube life

new in box GE 21LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box International 6LF6 / 6MH6 tube tested to spec on our Paul Hart-calibrated TV7/U

I am playing them with adapters (not included) in my Radio Craftsmen RC-2 monoblocks and they sound great