Ben,

As usual, you are thinking way ahead of me.

As for neons fading, I was thinking of some little "hockey puck" white neon
night lights I use on board as signals to show my inverter is "up".

My favorite use for neons today is to hold in front of a radar antenna to
see if the transmitter is working.

My favorite when I was a kid was to make a relaxation oscillator in a cigar
box for the door of my bedroom.  (I must admit I got the idea from my
mentor W1BB - Stew Perry - the Big Wheel ham operator in my hometown.) I
would beg for a used 90 volt "B" battery at the local radio repair shop
(yes Virginia, they actually *repaired* electronics in the old days). 

A-batteries were to light the filaments, the B-battery for plate voltage in
tube type portable radios.  The first transistor radio, the Regency, came
out when I was a teenager.  I asked my mom for one, (they were about $50),
for Christmas but the engineers in her convinced her she should get me a
Philco instead.  The Philco had subminiature tubes in it. These tubes were
created for "proximity fuses", tiny radars in anti-aircraft rounds fired
from guns that would actually detect when they approached the target
airplane and blow up just as the range started to decrease. The Philco
eagerly ate expensive batteries and the Regency is a collectors item today.

 I would put a capacitor across the battery in series with a resistor with
the neon bulb across the capacitor.  The capacitor would gradually charge
up at a speed determined by the resistor until it reached the ionization
point of the neon bulb, which would turn on discharging the capacitor. 
This would repeat resulting in a flashing neon bulb.

I would use a big neon bulb, the kind with normal household threaded base. 
It had a nice electrode arrangement and looked snazzy.  I would paint the
cigar box black with the bulb sticking out the front and a sign "Warning:
RADAR Burglar Alarm"



Norm
S/V Bandersnatch


> As to fading, they certainly do - but only when driven hard (at least to
> the best of my knowledge), which doesn't apply here. I've seen 40+ year
> old neon bulbs still working fine, once you've wiped the dust and the
> grime off. :)
>


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