Ooh nice. Like this too.
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Probably not but...
Is it there all the time or when under load ?
Traffo make ? (silly question)
I got a couple of 1000 VA from Canterbury (for the F5) and ,I did ask for audio Quality, they where making a racket, once you ear it you know is there, I complained and sent one back, It was sent away to be Vacum dipped and came back whit no Hum
If noise is there alla time probably same windings probably are not tight enough and dipping it may solve it ?
They Put the transformer in a autoclave inside a bucket of varnish/laquer, same time under vacuum not sure about the temperature 150C ?
Heat and vacuum get rid of air trapped between windings and as it cool down the spaces are filled by the varnish this stop the vibrations alegedley :D
Quote from Airlink
Advanced Filter Power Supply
- Avery Magnetics Advanced High Current 20A Filter
- Primary to Secondary Copper Foil Antistatic Screen
- Low Flux Density to Minimise Noise
- Lacquer Dipped Cores, Primary and Secondary Windings
End quote
Did you get in touch whit them and told them about the Noise?
IMO if I ever buy a trafo that big again I try Toroidy
Saving up for my next project
Papa F6
https://sklep.toroidy.pl/en_US/p/TTS...age-to-50V/415
Got the capacitors most of the other bits and a 25Kg Copper heat sink already.
The heat sink is a real monster came out of 150 Kw Danfoss Inverter
Soon on those screens (well do not hold your breath):D