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Some things work properly only if a battery is connected. Try it with a good battery in place.

Jim

I have a Burstner which also comes without a battery and yes you do get a hum from the transformer,it'snot very loud but it can be a bit annoying during the night.There's not much you can do about it other than put some sound proofing  around it but not too close or it may overheat.They are designed to work without a battery connected and all transformers will hum to a greater or lesser degree depending on the load at any one time.

Saxo1

Quote: Originally posted by saxo1 on 15/8/2011

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I have a Burstner which also comes without a battery and yes you do get a hum from the transformer,it'snot very loud but it can be a bit annoying during the night.There's not much you can do about it other than put some sound proofing  around it but not too close or it may overheat.They are designed to work without a battery connected and all transformers will hum to a greater or lesser degree depending on the load at any one time.

Saxo1

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Mine is situated underneath the base of the wardrobe so it was easily done I just stuck some polystyrene under the base of the wardrobe and to the sides of the base,I can still just about hear it in the middle of the night but I've learned to live with it.

Saxo1