I picked up a second hand Little Dot mk VI+ from Ebay last month.
It had nasty transformer hum/buzz, which surprisingly was eliminated pretty much entirely by removing the transformer covers. Some people had similar problems earlier in the thread, but had had problems removing the covers due to the screws being installed so close to the raised part of the capacitor cover. I managed to unscrew them by first using a small flat head screwdriver at an angle to the Philips-head screws and then using pliers to do the last few spins.
So the hum/buzz issues that some have had seems to be due to the toroidial transformers' magnetic effects moving the covers.
Now I've been considering what to do next: try to install some damping material for the covers and put them back, find some different covers of another non-magnetic material, or just leave them unattached. Any tips will be welcome.
The screwdriver I used had head size of about 3mm x 0,5-0,7mm. The only text on it says "Made in West Germany" so it's probably not a current model.
Are there any recommendations for quiet replacement fans? I think I'll need to have them on in the summer.
It had nasty transformer hum/buzz, which surprisingly was eliminated pretty much entirely by removing the transformer covers. Some people had similar problems earlier in the thread, but had had problems removing the covers due to the screws being installed so close to the raised part of the capacitor cover. I managed to unscrew them by first using a small flat head screwdriver at an angle to the Philips-head screws and then using pliers to do the last few spins.
So the hum/buzz issues that some have had seems to be due to the toroidial transformers' magnetic effects moving the covers.
Now I've been considering what to do next: try to install some damping material for the covers and put them back, find some different covers of another non-magnetic material, or just leave them unattached. Any tips will be welcome.
The screwdriver I used had head size of about 3mm x 0,5-0,7mm. The only text on it says "Made in West Germany" so it's probably not a current model.
Are there any recommendations for quiet replacement fans? I think I'll need to have them on in the summer.
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