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pilot light ideas please
pilot light ideas please
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Old 30th July 2008, 02:44 AM   #1
gary h is offline gary h  United States
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Join Date: Apr 2006
Location: bay area, california
Default pilot light ideas please

Hi all,

I'd like to put a light next to the on/off toggle switch on my preamp. Searching through the Mouser and DigiKey stock boggles my brain. What configuration comes recommended? I have the 6.3 filament supply with CT free on my B+ transformer so could I half wave rectify that to get into LED range? I've read warnings that neon and ic bulbs can interfere with LV signals.

Thanks for the ideas,

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Old 30th July 2008, 04:20 AM   #2
HollowState is offline HollowState  United States
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Join Date: Aug 2006
Location: Taxland, New Jersey
Hi Gary,

Radio Shack has a butt load of pilot lights in their pull-out draws. No need to special order these. They come in 6V, 12V or 120V configurations. They're LED or incandescent types. Or you can simply use a standard bare LED of your color choice mounted in a simple snap ring holder as shown below. For this type all you need is a single watt resistor in series with it across the AC line. No need to rectify anything. A typical value is 27K to 47K ohms.

If you mount it near the power switch, you already have half the AC there. Just twist another wire around what's there for the rest of the 120V. Keep the wires off to the side or close to the chassis and you won't have any hum problems.

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Old 30th July 2008, 04:24 AM   #3
gary h is offline gary h  United States
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Join Date: Apr 2006
Location: bay area, california
Hi Victor,

nice to hear from you again, and to see that you are still helping newbies. I'll get me to Rat Shack.

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Old 30th July 2008, 04:48 AM   #4
Apex Jr is offline Apex Jr  United States
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Join Date: Jun 2002
Location: Torrance, Calif
pilot light ideas please

I have some VINTAGE lamp sockets that have GLASS lenes
rather than the plastic ones available now.
I've got them priced at $2.50 each..
These are like the Fender lamp sockets

Steve @ Apex Jr
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