ferrite sleeve

[Stonsey]

Fitted a couple of optical smokes today and got a ferrite tube in the packs, bumf said to put the wires to the plug through tube and secure 30mm away from plug connector. I just wondered what this is for? Any ideas...

 

[malcolmsanford]

They are normally used for suppressant and noise control on electronic equipment, but not being that au fais on electronics I maybe wrong

 

[Stonsey]

Noise control... It made no difference to the smoke alarm!!

 

[KevinS]

Stops interference, on tv's etc

 

[Knobhead]

RF interference is the usual use. But why on smoke detectors, I don't know.

 

[brman]

I'd agree on the electrical/rf noise suppression. Out of interest what make alarms are they?

 

[KevinS]

They put them on smoke alarms to stop them interfering with your and your neighbours tv.

i was fitting one for a family that where hard of hearing and I took the ferrite tube off, it was incredibly good at messing with their tv when off

not sure what the neighbours think tho

 

[Stonsey]

They were senate's own brand sector. They weren't all that, they diddnt fit well on the base, although they were fitted on there correctly.