> > But every once in a while I hear that storing power tubes in a cold > > climate somehow degrades them or renders them useless. > > I remember seeing a warning somewhere a number of years ago about storing > certain power tubes at subzero temperatures. As I remember, the 100TH and > 250TH were mentioned specifically. Seems the tungsten filaments can > contract and fracture. Seems possible, but I have never experienced this > personally and pass along the information for whatever it's worth.
I was never warned about storing tubes in the cold (In South Texas, we got to 27 this morning, for about and hour or so, the back to 64 for a high) but I WAS warned by Mr. AM (rip) John L. Mohn/W5MEU - Store them tubes vertically! The filament can sag and fall into the grid, causing a short. At least on the bigger jugs - 811's, 813's, 100TH's, 250TH/L's, etc... Happy New Year y'all 73 = Best Regards, -Geoff/W5OMR -- 12:14am up 2 days 6:41, 5 users, load average: 0.00, 0.00, 0.00
