29-12-2020, 03:42 PM
(29-12-2020, 08:54 AM)ppppenguin Wrote: In 1986 when I steered a pre-war EMI 6/6 through rebuild the picture was disappointingly soft when I first ran it in a set. After an hour or 2 it was superb. I had activated the cathode on a test rig beforehand but presumably not enough to bring it up to full emission.
Do you know where this tube is today, Jeffrey? How has it fared?
(23-12-2020, 08:10 PM)Panrock Wrote: To which I would add:
Most 1950s-and-before sets seem to have soft tubes at first light after years of inactivity. However, these tubes can ....
Despite sounding so confident, I am not really sure whether this is due to the tube being soft, or some sort of 'crust' having developed on the cathode. Or both.
Steve
