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+--- Thread: Hmm a Hum! (/thread-5145.html)
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- juwi_uk - 02-17-2020
Hi
Noticed this week that my CM9000 based system has developed a noticeable hum; noticable in that it is heard through the wall in my sons room next door to the closet where it is installed! â˹ï¸Â
Any ideas guys. Is the transformer known to start humming after a few years etc?
Julian
- slychiu - 02-17-2020
It is not known to hum after a few years, but anytng can become faulty. Or it may be resonant with some other low freq devceHow old s it?are you sure it is due to the transformer. Did you try turniong off the mains and let it run on battery to se if the hum is still there?
- juwi_uk - 02-17-2020
Yeah I tuned off the mains and the hum went so to me that points at the transformer. Are these still available to purchase?
- slychiu - 02-17-2020
Please Check if Laser have any. These are heavy and expesive to ship overseasYou may be able to find a similar transfor in Farnell 15 to 16VDC output 2.5A (40VA)
- Swiss-Toni - 02-17-2020
Im sure that you can get the transformers from Laser.com, ps have you got any other powered devices on that electrical circuit when you powered it down
- Swiss-Toni - 02-17-2020
[user=1]slychiu[/user] wrote:
Quote:Please Check if Laser have any. These are heavy and expesive to ship overseasYou may be able to find a similar transfor in Farnell 15 to 16VDC output 2.5A (40VA)Im sure I have questioned that size transformer before as it is 230V~14V 1.8amps as I was looking at potentialy using that size one you have refered too!
- TheMax74 - 02-20-2020
Hello Juwi,
i\'ve swapped my transformer with a new one from Laser some years ago.
Mine was not humming, but i started to have warnings for low battery.
I suggest you to buy 1 or 2 of them as spare parts (i bought 3 of them, because i have 2 SEM as well), because your CM9000 will last for decades, and have spare parts is a good idea, until you find it.
- juwi_uk - 02-24-2020
Thanks, doesnt appear that Laser have any stock.
- TheMax74 - 02-24-2020
Do you need one of mine?
- slychiu - 02-25-2020
If you want to buy one, we still have some available, but the shipping would cost more. Send an email if you need