03-12-2014, 12:22 AM
Absolutely beautiful looking radio! Congrats again!
Mine certainly doesn't look a tenth as good on the outside, but at least I have you beat for originality underneath
I pulled the coil again. Unwound it and peeled off the plastic, now I just have to wait for the spool of 38 wire. I'm very hopeful my chassis will be singing again this weekend.
One bit of a problem though, one that's gotten me before. I failed to take into account how much faster the 80 tube heats than the rest, because of the direct cathode. The primary B+ line spikes to about 480v before settling almost a hundred volts less than that a few seconds later. The supposed voltages are nowhere near the maximums. My filter caps are only rated for 450v, and they're all I could find. They were actually recommended. Is a 7% spike for a short time dangerous for them? I've gotten very mixed messages about this from other sites.
Mine certainly doesn't look a tenth as good on the outside, but at least I have you beat for originality underneath
I pulled the coil again. Unwound it and peeled off the plastic, now I just have to wait for the spool of 38 wire. I'm very hopeful my chassis will be singing again this weekend.
One bit of a problem though, one that's gotten me before. I failed to take into account how much faster the 80 tube heats than the rest, because of the direct cathode. The primary B+ line spikes to about 480v before settling almost a hundred volts less than that a few seconds later. The supposed voltages are nowhere near the maximums. My filter caps are only rated for 450v, and they're all I could find. They were actually recommended. Is a 7% spike for a short time dangerous for them? I've gotten very mixed messages about this from other sites.