JANA wrote:

Go to your local electronics store, and ask for an NE-2. If the mains
voltage is 120 VAC, ask for a 120 kohm 1/4 Watt resistor. If the mains is
220 VAC, ask for a 220 kohm 1/4 Watt resistor.

As for the resistor, it is not very critical. For 120 VAC, you can use
anything from about 100 kohm to about 140 kohm. Double this value for 220
VAC operation. If you go higher with the resistor value, the lamp will be
a little dimmer. If you go lower, the lamp will be a little brighter. If
you go too low, its lifespan will be reduced.

You may have to buy these parts in a minimum quantity, unless the dealer
has opened packages of these parts in stock. Most distributors have a
minimum invoicing. You may have to shop around for a small quantity.


Also many 1/4W resistors are not rated for 240VAC use, but you might be able
to put two in series to get sufficient voltage rating if you can't get the
proper rating in a single resistor from your source of components.

Chris