Now that we are approaching the holidays and Christmas with a celebration of lights in the darkest time of the year (for the northern hemisphere), i thought that it would be a good idea to point out all the grabcad members that created radio tubes that harken back to the bygone years of yesterday's technology and which still provide enjoyment for radiophyles worldwide.
So here are some of the grabcad members radio tubes :
and also here's some lighting tubes:
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