Lindal 31JS6 31JH6C Vacuum Tube NOS NIB Matched Pair 24 dark gray rounded plates and

dark gray rounded plates and outstanding flashing

wing-plates

37 and44 where minimum (65%) is 25

Transconductance measured 68/75 for Tube One and 72/68 for Tube Two where minimum (65%) is 56/56 and 100% is 86/86

an O getter

Lindal 31JS6 31JH6C Vacuum Tube NOS NIB Matched Pair 24 dark gray rounded plates andThis new old stock, new in box GE 31JH6C tube tested to spec on our Paul Hart calibrated Hickok 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