Hello:
I am using, quite happily, an NS-30 amp with an upgrade that allows me to switch between tube and solid-state rectification.
I turn the unit off before making the change, make the change, then turn it back on again. I have found, however, that about 5 sec after I switch from tube rectification to ss, a bright flash happens in the top part of my tube - a Svetlana 5U4G.
Is this "flash" a problem? It almost seems like a capacitor discharging or something...
I've only tried it twice, and I think I'll stick with tube rectification for now, until I hear differently.. wouldn't want to wreck that tube!
Any insights would be much appreciated!