Zenith 100-79 Ballast Tube NOS NIB JANCHY12SN7GT new in box US-made 4DT6

new in box US-made 4DT6 / 4DT6A tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of Ken-Rad Type 35 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

These are 6N7 tubes

new in box Amperex World 1BC2 / 1BC2A tubes tested to spec on our TV7

Tube One measured 60 while Tube Two measured 62 where minimum (65%) is 55 and 100% 85

Zenith 100-79 Ballast Tube NOS NIB JANCHY12SN7GT new in box US-made 4DT6This new old stock, new in box Zenith 100 79 ballast tube and another just like it tested to spec on our Paul Hart calibrated TV7 U. Etsy will indicate the number available. 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