ED 328 1N1239 Solid State Rectifier Replacement For 5R4 5R4GT 50B5 This is an original recording

This is an original recording from 1939 and it sounds 15-20 years ahead of its time

It has very-light surface noise

Transconductance measured 24

new in box Westinghouse 17DQ6 / 17DQ6B / 17GW6 tubes tested to spec on our on our Paul Hart-calibrated TV7/U

ED 328 1N1239 Solid State Rectifier Replacement For 5R4 5R4GT 50B5 This is an original recordingwas 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 MARKED "DELIVERED,"