Power On Indicator Light

[pengboon]

Is there anything bad to have a AC power on Indicator light (operates on AC) on the equipment, or is it better to have a LED (operates on DC)? I know it's probably best to have nothing, but just for interest sake.

cheers!

[porkchop61]

I always run a 6.3V pilot light on my heater string. This is common in many antique radios.
I've also run neon panel lamps on the AC line.
I think it's a matter of preference.
Glenn

[Miles Prower]

Originally posted by pengboon
Is there anything bad to have a AC power on Indicator light (operates on AC) on the equipment, or is it better to have a LED (operates on DC)? I know it's probably best to have nothing, but just for interest sake.

No. As with anything else carrying AC, keep it away from sensitive, low level, circuitry. Indicators are most helpful if you split the heater power from the HV, as when using a SS power supply. It's most helpful to know if the HV is on or not.

[Wavebourn]

I use gas discharge voltage stabilizers, they glow nice and indicate B+ presence.

[pengboon]

Thanks for the replies everyone. I guess for tubes, it would be quite easy to tell. Don't we all love the glow.

I guess my point is, AC indicators (rated at mains voltages) are easy to implement (just 2 wires), almost the size of a LED, and not that much difference in price but seldom I see anyone using them.

Just food for thought anyway