RCA 30KD6 Vacuum Tube NOS NIB

RCA 30KD6 Vacuum Tube NOS NIBThis RCA 30KD6 tube 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 $250 IN VALUE. IF AN ITEM IS

TV7/U readings are in (parenthesis)

new in box (for Tube Two) aesthetically-matched pair of gray glass RCA 12SL7GT dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box GE 4MK8 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 6AU5GT tubes in this lot

new in box Osram N108 tube tested to spec on our Paul Hart-calibrated TV7/U

It measured 52/48 where minimum (65%) is 40/40 and 100% is 62/62

These six gray glass 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

(New EL84s typically test from the mid 20s to mid 60s with transconductance from 7420

these are the only Coke bottle-shape 6H6s I have seen in 25 years in the tube business

excellent flashing and 280 652 factory/date codes

Transconductance measured 7120 micromhos for Tube One and 7590 for Tube Two

new in box RCA 6BS3 / 6BS3A tube tested to spec on our Paul Hart-calibrated TV7/U