Sylvania 38HE7 Vacuum Tube Valve NOS NIB 4th Quarter BW48 Transconductance measured 2000/1900 micromhos for

Transconductance measured 2000/1900 micromhos for Tube One and 2000/2000 micromhos for Tube Two

am showing both sides of the watch to make identification as easy as possible

If you want them both

Both have BW date codes

Tube One drew 26

Sylvania 38HE7 Vacuum Tube Valve NOS NIB 4th Quarter BW48 Transconductance measured 2000/1900 micromhos forThis new old stock, new in box Sylvania 38HE7 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