Gents,
Afterwards maybe you can put your heads together and answer my earlier post asking if anyone could tell me whether they knew if running power for 45 mins through the LB could pose a problem, as I'm noticing the two rods on either side of the screen sort of passing through the screen after only a couple of weeks of using my LB with the AP for 45 min non stop sessions ...
OK, so nobody bit on this, I'll have a lash. Mostly guess, mind. First off, that's a huge amount of use. Perhaps not too many cycles but we're talking a dozen batteries to do that 45 minutes....and at a lower power level. And you do this a lot? You may well have the record number of hours on a single screen???
Anyway, I don't think the box was ever designed for this. You're running it hotter than originally intended in terms of drive (the PA didn't exist, battery weaknesses including discharging were part of the testing and design) but IMO more importantly in terms of time. I seriously doubt much testing was done by overdriving the screen (by the then standard) for very long times allowing the heat to build slowly a few degrees at a time. For sure the wood is dryer than it would be with the same number of hours with normal breaks and powers. The metal parts got hotter if even by a few degrees.
The erosion of contact between rods and screen (where it bonds on) is not good. It will cause the screen to slowly fail, first getting a bit colder strand by strand as the cross strands try to correct the current flow. Eventually you should reach a point where it will suddenly fail outright as the last few strands on one side get overloaded with all the current allowed by the improved contacts on the other side. It will suddenly pull free on that side and go stone cold. Or so I'd expect.
Anyway, I wouldn't do it. It is, of course, warrantied against failures......
What did the maker say when you asked? They've always been responsive, although sometimes slow to notice us here.
OF