[ARC5] Why "Noodling" About Sweep Tubes?

[wa5jci at flash.net]

If I had tubes like these I'd rig up a jig and run the filament in 
each tube for a couple days to see if that would do any good before I 
gave up on them. Might not make any difference but maybe it could?

de Pete  WA5JCI





>>Worse- I finally got around to testing the big stash of 211 tubes
>>I've been accumulating for years.   Much more than half of them
>>were bad- most from gas.   Of the few that remain, some are 
>>low-emisson and will work only in the oscillator stage.
>>This much-reduced stash is going to have to last, since 211 prices 
>>aren't likely to come down.
>>So I'm trying to find an affordable substitute, not only to "stretch"
>>my tube supply, but in hopes we can get some of those 375s
>>off the garage floor and back among the living.