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Old 12th May 2017, 12:26 AM   #11
diyAudio Member
Join Date: Feb 2005
Location: CA
Thanks again, Guys. I'll try it out and let you know how it works.
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Old 22nd May 2017, 12:50 AM   #12
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Join Date: Nov 2002
Location: Grantham, NH
They are standard NE-2 neon bulbs I believe. There used to be a zillion neon bulb sizes, but the NE-2 seems to be the most popular these days.

Putting on my engineer hat, I'd say it really doesn't matter too much what neon bulb you use. It is a pass element when the voltage across it gets above a threshold and than effectively opens the circuit when it stops conducting. A larger bulb would be able to pass more current, but it's current limited by the series resistor before it. so it really doesn't matter. If it was a different noble gas, it would "strike" at a different voltage, but good luck finding bulb with a gas other than neon.

I rarely see problems with those neon bulbs, I suppose if a speaker bad panels and ws left on for a long time, the bulb could burn out. I used to use a lot of NE-2's because I would replace the Quad 57 power supply power indicatior lamp bulbs. But I use an LED board that replaces the NE-2's in the 57's now, so I don't go through as many neon bulbs as I used to. I got them at mouser or digikey.

Sorry for the slow response, I haven't been on here very much (the weather is nice in the real world)

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Old 22nd May 2017, 08:56 AM   #13
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Join Date: Feb 2005
Location: CA
Hey Sheldon, thanks for your advice. I bought the neon bulb last week but didn't have time to replace it yet. Little busy lately. I'll try it soon.
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