3 National Union NU 7C4 1203A Vacuum Tubes NOS NIB Lot Of Three Prospects Of The even though they test on

even though they test on the cusp

Transconductance measured 73/79 where new/nominal is 50/50

8 milliamps' plate current and measured 2060 micromhos

This pressing has lightly-moderate surface noise

3 National Union NU 7C4 1203A Vacuum Tubes NOS NIB Lot Of Three Prospects Of The even though they test onThese three National Union 7C4 1203A tubes 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