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]

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 😀