ED 328 1N1239 Solid State Rectifier Replacement For 5R4 5R4GT 50B5 Transconductance measured 24

Transconductance measured 24

Tube One measured 82/81 while Tube Two measured 84/78 where minimum (65%) is 50/50

They tested (from left to right) as follows: 44

anode coolers for cooler operation and longer life

top D getters and anode radiators for cooler operation and extended life

ED 328 1N1239 Solid State Rectifier Replacement For 5R4 5R4GT 50B5 Transconductance measured 24was 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,"