For saleHaltron 5U4GB tubes. Great sounding audio tubes! Tested on RoeTest V10 (the best modern tube tester!). Excellent upgrade over any Chinese tube rectifiers!
(FOR SALE: 1 X L63 / 6J5G TUBE. 1950s MARCONI / MWT PRODUCTION. They do not take this into account. com, etc).
FOR SALE: 1 X L63 / 6J5G TUBE. (SPANISH AIRFORCE). 1950s MARCONI PRODUCTION. FLAT BLACK PLATE, RECTANGULAR GETTER. TESTED IN ROEHRENTEST TUBE TESTER. 80% 7.19mA EMISSION (EM).2.51mA/V TRANSCONDUCTANCE (GM).
2 Haltron type 42. Made by Brimar in England in the 50s. They test strong and as a perfect matched pair at 40.0 and 40.0mA where 34.0mA is the nominal. I have two pair of these tubes listed. This is pair no1.
(2) Haltron 6AG6 / EL33 / KT61 Tube. Tube box may have faded or missing labels. NEW IN BOX. All Images are from sold item.