Indicator tubes for transistor logic machines.

[Tony Duell]

> The colors he said were "green, black red".   Dunno if you'd call that a=20
> preferred value,  but I've seen such.

OK, so 5k obviously... Not a common value in any series these days

I think my question would then have been : Are you sure it was a resistor? 
I've seen picofuses with those colours (5000mA = 5A), although IIRC, they 
normally have a 4th band giving the time-delay charactistics.

-tony