Like for like mr16 transformer but it buzz now

[Kyran]

Hi all

question, I have just take out a transformer for a mr16 down light it, was a varlight 50w about three years old, I replaced it with the same varlight transformer just a new one, it's a new design but the looks of it but still the same model. Now the lights buzz. Do varlight transformers only like var light dimmers as there is a new dimmer in to, it's only 4 down lights (one driver per light) and the dimmer can has a rating of 300w. The dimmer is not buzzing only the lights. Did not check that the bulb was a dimmer able one. But it does dimm properly it just buzz.

It it should not be buzzing, or should I just stick in the varlight dimmer.

 

[amlu]

old transformer was a "old school" type proper transformer and you replaced it with a electronic one? (it may have a same set of connections and rating, but should be lighter in weight)?

 

[Kyran]

old transformer was a "old school" type proper transformer and you replaced it with a electronic one? (it may have a same set of connections and rating, but should be lighter in weight)?

The one i took out was an electronic transformer (newer transformer). thats why i was wondering why it now buzzes, as i side its a like for like replacement just the new transformer as a different (new) case design.

 

[Guest111]

A light cannot buzz,maybe it's something to do with the frequency at which it is operating and this is close to the resonant frequency of the holder and it is causing a slight vibration which is interpreted as a buzzing noise.

 

[davesparks]

Lamps can buzz or 'sing' when dimmed.

 

[telectrix]

But is it the lamp buzzing, or the tranny?.

 

[amlu]

if they both electronic then the newer one may have a different circuitry inside, or producer did not put inductors big enough to suppress the buzz.
swap for another brand and see how it goes...

 

[Kyran]

But is it the lamp buzzing, or the tranny?.

Its differently the the lamp, i took it out of the ceiling and turned the it on the buzzing is coming from the can/lamp not the tranny. So why is it buzzing. I tried swopping out the lamp with another one from the other bank of down lights that do not buzz. still buzzed so it was not the type of lamp. I change the tranny for one of the older ones so you ended up with all four trannies are of the same age type/make ect. still buzzed. there are only four down lightt on this circuit/dimmer. the only way it stops buzzing is when you remove one othe the circuit only consists of 3 down lights. This is probable why maybe that the previous owner did not have its on/lamp in it.

The dimmer still does not buzz. should the dimmer be changed for a better quality one. maybe a Varlight to match the trannies. is it some how messing with the frequency.

Anyone got any ideas..