isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.

Dick Carroll wrote:

W8CRZ wrote:

I have a 3-500z tube and just want to make a conversation piece out of it. I
am going to make a wood base for it and I would also like to feed some
current into it just to make it glow.I was told it was possible but he
wasn't sure how or which pins to do it with. Also I know it is a 5 volt tube
and 14.5 amp.do I really need that much to make it glow? Would 12 volt work?
Thanks
Rob W8CRZ

You sure don't want to put 12 volts on it unless you want to burn out the
filament. It needs 5 volts. The transformer will have to supply the 14.5 amps or
it will not hold up, either. There are 5 volt transformers out there which have
no center tap that can be bought pretty cheap since they won't work out easily
for use in an amplfier..

Dick

-- If it's a "new economy," why do they want my obsolete old money?