RCA 5Z4 Vacuum Tube Rectifier NOS NIB Short Base new in box GE 1DN5

new in box GE 1DN5 tube tested to spec on our Paul Hart-calibrated TV7/U

These tubes have steel support rods

excellent flashing and 58-13 188-5 date/factory codes

Transconductance measured 40/40 for Tube One and 42/46 for Tube Two where minimum (65%) is 32/32

new in box Philco tube tube -- and two just like it -- tested to spec on our Paul Hart-calibrated TV7/U

RCA 5Z4 Vacuum Tube Rectifier NOS NIB Short Base new in box GE 1DN5This new old stock, new in box RCA 5Z4 and another just like it tested to spec on on our Paul Hart calibrated TV7 U. The default setting is one; you must indicate the quantity you want. Etsy will indicate how many are 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.