Dave, On Sat, 11 Nov 2006 15:08:40 -0800, Dave King wrote: > Can anyone fire up a way back machine and throw me a bone on how to > test tubes with a multi meter? > I know it can be done (to a point) but can't find any specifics on > what to look for. I have a pile of mil-spec > tubes I need to go through and find out if any are good. The primary > ones are some triodes and a few power > beam pentodes. Other than being able to tell if filaments are not > shorted will a meter be able to tell me any more? Well it will be able to tell if the filament is open-circuit too! That will give you an instant go/no-go, anything else needs the thing to be powered-up and some sort of high voltage supply set up. Remember to keep one hand in your pocket when messing about with this stuff live! Cheers, Howard Winter St.Albans, England -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist