I have a hummy transformer in my new stereo. Do you think potting would be best? Im going to try isolating with some rubber in between the chassis first. What can I pot it with if it doesn't work?
A couple people have cautioned against "consumer" silicone, as it contains acetic acid. Didn't seem to cause me any issues, but something to consider. But an industrial version would surely be better. Epoxy works well in my experience.
It depends how badly the coils or plates (depending on the transformer type) are vibrating. If there is a lot of movement in the windings or plates, the sound will not only be heard in the speakers, but also directly from the transformer. Basically, a silent transformer is rock solid.
@@ranbymonkeys2384 Because I have experienced a bunch of humming transformers and I know why they hum. The "vibration" is causing the hum, whether it is coming from the speakers, or ( with much more vibration) coming from the transformer. The latter will cause your speakers to hum considerably louder. The humming in the video was atrocious, thus the sound would come from both the transformer and the speakers. A slightly loose (vibrating) transformer will only be audible in the speakers. A tiny bit of hum in your speakers (ear right to the speaker) is fine (normal), but if you can hear it from 6 feet away, then the transformer is vibrating pretty badly.
I have a potted (epoxy) transformer that hums like that without any load. Do you have any idea of what could be the issue? I'm starting to believe my transformer is shot.
You may be right. I'm unfamiliar with transformer failure mechanisms, but perhaps the insulating varnish on the core laminations has broken down? Or the potting has voids?
@@qwaqwa1960 I am not an expert either, but from what I do know, I think you are absolutely right. I think it might be best to dip (repeatedly) a toroidal transformer in lacquer to fill all voids before potting. Epoxy is too thick to flow into the core of the transformer and solidify any movement of the wires.
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I have a hummy transformer in my new stereo. Do you think potting would be best? Im going to try isolating with some rubber in between the chassis first. What can I pot it with if it doesn't work?
A couple people have cautioned against "consumer" silicone, as it contains acetic acid. Didn't seem to cause me any issues, but something to consider. But an industrial version would surely be better. Epoxy works well in my experience.
is the transformer actually vibrating causing that or is that the sound coming out of speakers?
It depends how badly the coils or plates (depending on the transformer type) are vibrating. If there is a lot of movement in the windings or plates, the sound will not only be heard in the speakers, but also directly from the transformer. Basically, a silent transformer is rock solid.
@@gordthor5351 How could youy possibly answer that question if you aren't there?
@@ranbymonkeys2384 Because I have experienced a bunch of humming transformers and I know why they hum. The "vibration" is causing the hum, whether it is coming from the speakers, or ( with much more vibration) coming from the transformer. The latter will cause your speakers to hum considerably louder.
The humming in the video was atrocious, thus the sound would come from both the transformer and the speakers.
A slightly loose (vibrating) transformer will only be audible in the speakers.
A tiny bit of hum in your speakers (ear right to the speaker) is fine (normal), but if you can hear it from 6 feet away, then the transformer is vibrating pretty badly.
@@gordthor5351 OK then is it coming from the speakers??????
Ya that is the question I asked and then you came in with your bullshit.
I have a potted (epoxy) transformer that hums like that without any load. Do you have any idea of what could be the issue? I'm starting to believe my transformer is shot.
You may be right. I'm unfamiliar with transformer failure mechanisms, but perhaps the insulating varnish on the core laminations has broken down? Or the potting has voids?
@@qwaqwa1960 I am not an expert either, but from what I do know, I think you are absolutely right. I think it might be best to dip (repeatedly) a toroidal transformer in lacquer to fill all voids before potting. Epoxy is too thick to flow into the core of the transformer and solidify any movement of the wires.
A strip of copper sheeting during winding will shield for that's