Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => The Newcomer's Forum => Topic started by: Den. on January 01, 2023, 01:48:18 PM

Title: Shorted IEC line filter
Post by: Den. on January 01, 2023, 01:48:18 PM
Hi. The amp is a three year old Peavey Vypyr. The amp started smoking and the breaker in the power strip it was plugged into tripped shutting everything down. I've determined that there is a short inside the 3Amp IEC EMI filter. Screenshot (712).pngI've found a replacement online that I can order that has the exact same specs. I also found 1A, 6A and 10A rated filters with almost the same specs. The one spec that is different is the inductor spec. My questions are: Is the inductor used in that device what determines the device's AMP rating? And, would there be an advantage with using a replacement EMI filter with a higher (or lower?) AMP rating for this application?  Thanks.1 3.7.png3 1.8.png6 .8.png10 .3.png10 .5.png     
Title: Re: Shorted IEC line filter
Post by: joecool85 on January 01, 2023, 05:33:16 PM
Assuming that there is a fuse somewhere on the amplifier, you will be all set to use a larger EMI filter.  Just don't go smaller, or you will have the same thing happen again.  I would go with the 6A myself.
Title: Re: Shorted IEC line filter
Post by: Den. on January 01, 2023, 07:16:25 PM
Quote from: joecool85 on January 01, 2023, 05:33:16 PMAssuming that there is a fuse somewhere on the amplifier...
Yes, there is a fuse. A t3.15al250v on the circuit board. And, in other news...

DSCN6627 (2).JPG
Title: Re: Shorted IEC line filter
Post by: phatt on January 02, 2023, 04:56:33 AM
Looks like Ukraine shot it down ;D
Phil.
Title: Re: Shorted IEC line filter
Post by: joecool85 on January 04, 2023, 11:44:40 AM
Quote from: Den. on January 01, 2023, 07:16:25 PM
Quote from: joecool85 on January 01, 2023, 05:33:16 PMAssuming that there is a fuse somewhere on the amplifier...
Yes, there is a fuse. A t3.15al250v on the circuit board. And, in other news...

DSCN6627 (2).JPG

Yeah, I'd say this is the issue lol.
Title: Re: Shorted IEC line filter
Post by: mandu on January 28, 2023, 06:40:50 AM
These line filters live for many years.
Probably, the ac supply voltage exceeded more than the rating of some component for too long.

Regards.