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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Resistor for neon indicator lamp
I've got a tankless electric water heater from eemax. that stopped
working the other day. eemax won't provide any component level support, but I've ordered a new board for $45.00. When I opened up the unit, after switching off the circuit breaker on the 240V AC line, I observed that a big (maybe 3-5 watt) (metal film?) resistor was discolored and was an open circuit. The markings look like 100 ohms, but because of the discoloration it's hard to be sure. I say metal film because the resistor is pale blue in color. The resistor feds a neon indicator bulb... (And probablly more of the circuitry.) My question. Is 100 ohms a good value as a current limiting resistor for a small neon lamp running off 240 V AC? (60 Hz if that matters.) I'm not sure what the I-V curve for the lamp will look like. (Is the one shown here OK?) http://en.wikipedia.org/wiki/Neon_lamp Thanks for any advice. George H. |
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