TheWindyCity
New Member
Greetings all! With much time on my hands due to he current world situation, I decided to re-lamp my Kenwood KR-10000 II one final and last time, using LEDs. I have re-lamped this receiver multiple times since I have owned it. We have it on pretty much every day for more than 8 hours! I previously put dropping resistors in the lamp supplies to make the bulbs last longer. I was getting about 5 years out of the incandescent bulbs this way.
The receiver has two lamp power supplies to drive 21 incandescent lamps in total. One supplies 8 volts AC to four bayonet style lamps for the meters. Another supplies 8 volts DC to seventeen 3mm grain of wheat lamps.
LEDs:
After testing, I used these 12VAC 180 degree, 2700K lamps from Superbright LEDs for the meter lamps. Power to the lamps was at about 9 VAC, and the brightness level was perfect for the four meters.
For the remaining grain of wheat lamps, I went to eBay searching for a 3mm warm white LED, and found a 3500K, 3.0 V, 20mA, 120 degree angle LED in a 3mm package. To this, I added a 270 ohm, 1/8 watt dropping resistor.
The conversion took me about 2 weeks from procurement to finish. I am really pleased with the light level and color. It looks great lit up at night in the stereo cabinet. Now I don't have to worry about going back in to change lamps any longer.
In process -- a mix of both
How I modified 17 of the 3mm LEDs
Old and new meter lamps
Completed modification:
The receiver has two lamp power supplies to drive 21 incandescent lamps in total. One supplies 8 volts AC to four bayonet style lamps for the meters. Another supplies 8 volts DC to seventeen 3mm grain of wheat lamps.
LEDs:
After testing, I used these 12VAC 180 degree, 2700K lamps from Superbright LEDs for the meter lamps. Power to the lamps was at about 9 VAC, and the brightness level was perfect for the four meters.
For the remaining grain of wheat lamps, I went to eBay searching for a 3mm warm white LED, and found a 3500K, 3.0 V, 20mA, 120 degree angle LED in a 3mm package. To this, I added a 270 ohm, 1/8 watt dropping resistor.
The conversion took me about 2 weeks from procurement to finish. I am really pleased with the light level and color. It looks great lit up at night in the stereo cabinet. Now I don't have to worry about going back in to change lamps any longer.
In process -- a mix of both
How I modified 17 of the 3mm LEDs
Old and new meter lamps
Completed modification:
