Quote:
Originally Posted by RetroHacker
I found this set at an estate sale a while back - with a "FREE" sign on it, no less. Of course, I had to rescue it - how often do you find tube type tabletop sets these days?
http://i.imgur.com/oIvSPNg.jpg
Before powering it up, I took the back off to check for any major problems, and found one almost immediately:
http://i.imgur.com/QP2Makv.jpg
That horizontal output tube must have gotten seriously hot to melt the glass like that. It's been a while since I saw a tube that had gotten hot enough to implode and fail like this! I really wonder how long the set ran before the tube got hot enough to melt, break, and open the filament shutting down everything?
I haven't investigated this further - I have too many other projects at the moment. I'll have to locate another horizontal tube - which I might have amongst the various boxes of used, unsorted, scavenged tubes. Then I get to figure out what caused it to melt down like this, no doubt loss of horizontal drive. The rest of the set is dirty, but in pretty decent shape, so it's probably worth putting a little effort into resurrecting.
And, another shot of the back of the set, just because: http://i.imgur.com/6qhPvJk.jpg
-Ian |
Could be a shorted HV rectifier. Is that horiz output tube a 29KQ6?
I have a newer Panasonic hybrid with low hours. They use tubes, that are generally found in European or British sets. 300 ma heater string, where the US sets used 450 or 600 ma tubes.
