> Hi, there!
 > Anyone out there who can tell me if there are any significant
 > differences between the 6146B and the 6146W?
 > I stumbled over some W's mil surplus, all brand new and in
 > original cartons,
 > and I intend to use them to keep my old TS520 alive - that is,
 > if they will do the job properly, of course.
The W designated the "military" version of the tube - more rugged. It'll take 
more punishment and keep on working (some radiomen were, after all, just 
Military personal! )
There's no difference in them, except that the W will last longer in your rig 
(probably a life time)
I've never heard of a 6146 going bad, though - I've got some here, that were 
original equipment in an old E.F. Johnson Viking II, that are still in use 
today (in an HT-37, because I was checking something out)
both sets are still good!
   73 = Best Regards
   -Jeff KA5THB
   ka5thb@bigfoot.com
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