[Milsurplus] TV-2/BU tube checker problems...

[W7QHO@aol.com]

In a message dated 1/19/04 3:49:19 PM, keng@moscow.com writes:


> 1) The last time I tried to check some 0B2 and 0A2 VR tubes 
> with it, the VR tubes kept flashing and drawing more current 
> than they should for a bit, even at the low current rating of 5 
> mA. If I let them get good and hot, they would sometimes settle 
> down. HOWEVER,
> 
> 2) After checking several of them, BOTH 3 amp fuses blew.
> 

Ken,

Never tried to check a VR tube on a tube tester.   Don't recall ever having 
one fail (unless I did something like dropping it on a cement floor).   You got 
me curious, though, so I went down and turned on my TV-2C/U.   Only VR tube 
handy was an 0C3 (VR-105) which checked out from cold just like the chart said 
with no flashing, sputtering or fuse blowing.   

Would seem your TV-2 is pushing way too much current through the tubes under 
test for some reason.   Took a quick look at the schematic but WOW, tough 
tracing anything through that maze of wiring and switches...

Dennis D.   W7QHO
Glendale, CA



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