Skip I added the pix to your fine commentary. Plus Toms pix. But its now a 3MB file. Yes above the oven is the first state selector magnet. Never ever thought I would see this clarity and level of detail. Not sure there is any way to see the photo multiplier. I believe that would be a set of elements that were in the same vacuum as the rest of the tub. Some place close to the ionizer. I know what normal photo multipliers look like but suspect this will not look like those. Thanks for making my day. Now I know how to work on Frankenstein's brain. Well maybe not right now.
Regards Paul WB8TSL On Mon, Oct 31, 2016 at 7:41 PM, jimlux <jim...@earthlink.net> wrote: > On 10/31/16 3:28 PM, Richard (Rick) Karlquist wrote: > >> The ghost of Jack Kusters is now spinning in his grave on >> this Halloween night. Jack was a fairly opinionated >> guy and it didn't take much to get him excited. >> >> Jack used to rail against people who asked this naive >> question. There are any number of reasons why this >> doesn't make sense. One major one is that everything >> in the tube is thoroughly "cesiated" as Jack put it. >> Another is: how do you determine which parts to replace? >> Another is: is this economically feasible? >> >> > > This is a classic question on small volume manufacturing (which I'm sure > these tubes are).. > > The only "rebuildable" (vacuum) tubes I've seen are things like very high > power transmitting tubes, high voltage rectifiers, and high power ignitrons > or mercury arc rectifiers. All in the "hundreds of kV" or "hundreds of > kW" kind of range. I think they can rebuild smaller transmitting tubes > (10-20 kW), too. > > I've seen a 1930s-40s era Cockroft Walton generator with not just > rebuildable rectifiers, but it's not even sealed: you run the (diffusion) > vacuum pump when you're operating it. The other things are not exactly a > tube, but things like pelletrons, dynamitrons, and febetrons also tend to > have a vacuum pump associated with them. > > In this case, there are "user serviceable" parts inside - either because > they're mechanical devices, or because there's a fairly high probability of > internal localized and repairable damage from a flashover. > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.