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Old 19th August 2009, 01:40 AM   #1
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Default 1:1 transformer replace with line filter

Hi for my HT supply I have a 1:1 transformer however it seems abit rubbish as even at 100VA it causes a very nasty transient in my other amplifier plugged into one of the rooms same sockets. It also seems to have a huge radiated field that's causing mains hum issues. This has me thinking, if the only reason for using 1:1 transformers is for protection against mains bourne transients and to prevent a device injecting noise onto the power line then can't I just replace the transformer with a line filter?

The transformer is enclosed in a steel case that is grounded to mains earth so I don't think there is any safety implications from this.
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Old 19th August 2009, 02:10 AM   #2
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Looks like it has an interwinding short.
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Old 19th August 2009, 02:41 AM   #3
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Default Re: 1:1 transformer replace with line filter

Quote:
Originally posted by kipman725
This has me thinking, if the only reason for using 1:1 transformers is for protection against mains bourne transients and to prevent a device injecting noise onto the power line then can't I just replace the transformer with a line filter?
That's not even close to being the reason. They are there for galvanic isolation, an absolute must for safety.
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