Fan interference????

[Ironman]

Going to go into the shed and set my fan at 25% and see if I get the same thing happening.

My ballast is literally 6 inches away from the fan mate. 😉

sent from Thames Ironworks

[Viz]

No, I got the omega 600.

I just put the bottom half of my bowl trimmer made of metal ( thanks loki) over the ballast and it stopped the noise.��

I'm gonna move my ballast away and hope that does the trick��



sent from Thames Ironworks

That the bowl stopped the interference means your ballast is unshielded (normal) and that if you put even tin foil between it and the fan it should stop the interference.

[Bud Lightyear]

A fan running at 25% will be close to its stall threshold given the static pressure in the ducting on top of that, fans hum when they get close to stall....I'm guessing when you put your light on your creating a voltage drop in the supply which is further slowing the fan...My variacs reduce my fans by voltage, I never run them less than 120v which is half the mains voltage. 25% for me would be 60v that's not good man. Try setting your fan to 50% see if it does the same thing..

Regards BL

[Ironman]

That the bowl stopped the interference means your ballast is unshielded (normal) and that if you put even tin foil between it and the fan it should stop the interference.

Well I would rather do that than move it! I shall get the tin foil out and shield my ballast! Cheers viz you a mind of info😆😆

sent from Thames Ironworks

[Ironman]

A fan running at 25% will be close to its stall threshold given the static pressure in the ducting on top of that, fans hum when they get close to stall....I'm guessing when you put your light on your creating a voltage drop in the supply which is further slowing the fan...My variacs reduce my fans by voltage, I never run them less than 120v which is half the mains voltage. 25% for me would be 60v that's not good man. Try setting your fan to 50% see if it does the same thing..

Regards BL

Just moving my fan to 35% has stopped the noise. I'll set my fan higher, I'm guessing it won't last very long running that low then?

Thanks for the info mate😉

sent from Thames Ironworks

[Ironman]

That the bowl stopped the interference means your ballast is unshielded (normal) and that if you put even tin foil between it and the fan it should stop the interference.

Viz weirdly, placing the tin foil between them also stopped the the noise!🤔

sent from Thames Ironworks

[Viz]

Not weirdly at all. What do you think the sheilding is in electronic equipment, lead sheets? Nope normally some light allow like tin foil.





We should all wear a tin foil hat... They were not crazy after all.

[Trex]

I suspect a faulty speed controller . Watxh IM when those go faulty it fucks up the voltage output ,making your fan run on lower Voltage instead of modified frequency and WILL fry your fan guaranteed