the filiament voltage ........ for the 4-250A tubes can you go over a
bit, say to 6 volts?
will this adversly affect the tube what i really need to know will it
kill it right away.
What is the max filiament voltage any of you have put on this tube and
made it last and preform to your satisfaction?
thanks for any help you can give
Chris NI4L
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