I've still been having trouble keeping the #47 lamps in my NC-303 receiver from burning out. I have them DC regulated and a 1-ohm series resistor to knock the voltage down to just under 6.0V. I've been tempted to retrofit it with LEDs instead. It took almost 1 year, but all 3 of the dial lamps burned out. One burned out last summer, then the next one burned out about 3 months ago then the last one early this week. Well, I replaced all 3 of them again on Tuesday and one of them has already burned out just today. Anyway, I think it's just the cheap ass lamps I bought online and they are the same kind you get from places like Antique Electronic Supply, etc. and they are probably made in China. I searched around and found the #755 lamps below. These are made by GE and they have a 20,000 hr average life span. They also make the #47's too, but those only have the 3000 hr life span. I'm hoping these will last, but I guess I will find out. Does anyone else know any that will last longer that are not made in China? If not and these #755 lamps don't last I might just retrofit the receiver with LEDs instead. Technical Specs Item Miniature Incandescent Bulb Overall Lamp Shape T Trade Number 755 Lamp Shape T3 1/4 Base Type Miniature Bayonet (BA9s) Voltage 6.3 Current Drawn 150mA Watts 1 Average Life 20,000 hr. Initial Lumens 1 Light Color Clear Max. Overall Length1.19" Lamp Type Miniature-T Standards Meets 2012 Lighting Legislation Energy Primary Application Indicator .