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    Help: Rotel RB990BX Buzz/Hum

    Boerrie Try disconnecting the earth on the 3 pin plug and report back. I would be surprised if this was anything but a grounding issue given your touch on the chassis experience.
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    Rotel RMB1075: Informed, experienced advice on bi-amping, please

    There is often confusion between power capability and power draw. Think about electrical supply at the wall. Generally it will have the capability of delivering a few thousand watts, but every appliance connected to it will draw different amounts of power. A regular light bulb, 60 watts. An...
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    Any suggestions on ambient music....

    Like how original? Amazon have a few of the albums used though. I prefer sticking to lossless. There is a "KLF remastered" set floating around. A compilation fan album. Chili it is also out there
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    My first ever DIY bookshelf speakers

    You can get self adhesive vinyl wrap from Builders Warehouse. I would think this will be the easiest to start with and therefore will give the neatest result. You should be able to get very thin solids +3mm - SeanS found some here in Cape Town. Cant remember where he found it though. If you are...
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    My first ever DIY bookshelf speakers

    Thats what its all about
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    Slewmaster amp diy

    JANNAS - Can I ask for more details on those heatsinks? Did you get a good deal on them somewhere?
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    Leach Amp re-build

    Yeah I am. I have 1 or 2 items left. I think? some fully assembled boards. Will see when i get a chance. The transformer at 39-0-39 does seem to be a good match for those boards though.
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    Rotel RB985 hum/ buzz

    The varying hum in the transformer itself sounds most like DC on the AC mains. As Pierre said, maybe try your unit somewhere else. Otherwise, switch off ALL appliances in your house and flip the DB board so that only that circuit is running. That MAY solve DC on the mains. If it is that then...
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    Am I biting off more than I can chew, speakers and amp as a school project?

    I like the recycle idea. Multiple layers of box cardboard sandwiched / glued together would make a relatively stiff enclosure. It could be ported so the girls can speak about helmholtz resonance. The pipe idea is also great with the girls being able to speak about quarter wave resonance. In my...
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    Have you ever had one of those days

    Depends though. If the work I am doing is an opportunity to grow / learn, which it often can be, then I don't mind working those late evenings. Creating new architectural patterns & proof of concept, refactoring code, increasing efficiency. Gives me peace of mind knowing the systems I have...
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    How to not get hacked

    Most authentication platforms allow you to se 2 factor authentication. IE you login with your regular password, a pin gets sent to your phone / email which you then have to enter in order get get full access. In this way you could set it up so that the person would have had to steal your...
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    Slewmaster amp diy

    Someone else is asking for some meters like in the Mckintoshes. Looking for solutions and maybe I can do something for you at the same time :)
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    My Spirits are lifted

    They are smaller so I cant believe they are better. You'll have to convince my ears in person. Love the colour!
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    Audyssey MultEQ Editor App

    Or Marantz. later models only though
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    Slewmaster amp diy

    That looks disgustingly neat!
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    Corel Calculate Opinion or Review

    Depends on the VBA code itself. The file types are not compatible between 2010 and 2007, the vba itself is
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    Leach Amp re-build

    Oh and BTW, I have a single sided board layout for PSU and protection that is easily home fabricated. If any of you leachers feel you need one. They are quite reliable amps though so usually people leave them out, but having once lost a nice set of drivers on someone else's crappy oscillating...
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    Leach Amp re-build

    The best news I have heard all week. Was wondering when we would hear something. Thanks Ludo, you're a star chap! When I was assembling the later versions of this I did the exact same stupid thing with not fastening the flat pack transistors down. I had already tested the assembled boards and...
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    Which scanning software? (Windows 7)

    Very unusual to have a multipage jpg file. Wouldn't be very practical.
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    Reputable coin collectors/assessors

    Agreed ... dubious people. As a start you can check for yourself. Actual grading requires scrutiny of the item and it is subjective https://www.ngccoin.com/price-guide/world/
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