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Old 20th February 2005, 05:07 AM   #1
lpd is offline lpd  Canada
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Default Heater Question

Ok. I'm beginning my first project. Part are purchased, and the chassis is prepared to be punched. Now I have a question regarding my heater for 6SN7's. I am using a bridged rectifier, through two 4.7K capacitors to convert to dc (I haven't figured out what I will need for a resistor at the tail end to drop to 6.2VDC probably about .5 ohms give or take), but I also want to run a led light off of the heater.

Can I do this safely without introducing noise into the circuit or am I asking for trouble?

Is there another way to run a led for a power light?

Thanks
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Old 20th February 2005, 12:46 PM   #2
kekso22 is offline kekso22  Germany
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Quote:
but I also want to run a led light off of the heater
Put a resistor in series with the LED.
There will be no measurably noise added.
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Old 20th February 2005, 04:27 PM   #3
anatech is offline anatech  Canada
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There will be no noise added, period. LED's are also used for quiet current sources and you are running it on DC, no pulses either.
Glow away dude.

-Chris
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Old 20th February 2005, 04:41 PM   #4
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[i]Originally posted by anatech LED's are also used for quiet current sources and you are running it on DC, no pulses either.

Agree.....quieter and cheaper than zeners too ...

rich
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Old 20th February 2005, 05:35 PM   #5
lpd is offline lpd  Canada
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Thanks guys. Its a cool aqua blue one and should look great with a hammetone finished chassis.
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