6 RCA 12HL7 Vacuum Tubes Valves NOS NIB Lot Of Six

6 RCA 12HL7 Vacuum Tubes Valves NOS NIB Lot Of SixThese six new old stock, new in box RCA 12HL7 tubes tested to spec on our Paul Hart calibrated TV7 U. 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 QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO

This is a Polish pressing from the communist period

engraved bases and narrow rectangular mica spacers

This Sylvania 6BQ5 / EL84 output tube was tested on our Maxi-Matcher 2 with 325 volts on the plates and a bias of -14 volts for shorts

This almost-perfectly-matched pair of Sylvania black plate 6C4 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

This pair of NOS-TESTING RCA 6BG6G output tubes was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

Tube Two measured 10

new in box RCA 6LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing lot of six Tung-Sol black glass 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of --36 volts for shorts

Five are 6S4As and one is a 6S4

5 volts with adapters (not included) and they sound tremendous even though they straddle the cusp and are running with a lowered filament voltage

new in box RCA 6AQ5A tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box 7F8 tubes tested to spec on our Paul Hart-calibrated TV7/U