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Old 13th May 2013, 08:25 PM   #961
6L6 is offline 6L6  United States
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I had no idea (until a minute ago) that the DIYaudio store had them as well ---

19V 4.74A Power Supply (100-240V) - Amp Camp Kit - Kits

Buy from the store, support the forum. Win win!
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Old 13th May 2013, 10:48 PM   #962
xrk971 is online now xrk971  United States
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Similar bricks are available elsewhere as well, I think it is important to get one with a 3 prong grounded plug. In my experience, it reduces noise and 60 Hz hum plus it is safer. I see them for $12 online - not sure what everyone else's experience is with 3 prong vs 2 prong cords. The negative out is connected to earth ground.

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Old 14th May 2013, 01:18 AM   #963
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For these bricks, the 3rd prong is there to reduce EMI/EMC noise and not relied upon for safety, even though it it connected to the 0Vdc this 3rd prong won't protect the user in the event of this bricks malfunction. If you do get a brick make sure it is a certified type like CSA, UL, TUV type this way your house won't catch on fire.

p.s. CE mark does not mean much as far as safety is concern, it is a self declaration so any manufacturer can claim that their product are safe...long story short don't buy a brick with only CE marking.

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Old 14th May 2013, 01:56 AM   #964
xrk971 is online now xrk971  United States
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The CE mark may be self-proclaimed, but a reputable multi-national manufacturer (HP, IBM, Sony, Lenovo, Matsushita, etc.) will only declare this after the product has passed CE directives for safety such as the "Low Voltage Directive (LVD) 2006/95/EC". Passing these tests and paying for the tests is very expensive. So expensive that many smaller manufacturers cannot afford to offer their product in certain EU nations where the CE cert if required due to the prohibitive cost. There is a $12 19V 4.65 amp brick from HP with CE, UL, CSA cert. I would think that this is safer than a 2 prong one, and lower EMI/EMC noise.
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Old 14th May 2013, 02:38 PM   #965
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Does anyone know where I can find TO-247 mica insulators, preferably at Digikey (a product number?)? I'm trying to navigate there and I keep running into dead-ends or bulk options. I only need 4 mica insulators, not 3,000. Again, I'm getting ready to place an order at Digikey and would prefer to have it in this order, not to have to pay $5+ shipping elsewhere for 4 insulators.
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Old 14th May 2013, 02:40 PM   #966
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SP2000-0.015-00-104 Bergquist | BER200-ND | DigiKey
Get these. Good performance and easier to work with than Mica
SP900S-0.009-00-104 Bergquist | BER178-ND | DigiKey
Cheaper option
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Old 14th May 2013, 02:47 PM   #967
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Many thanks!
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Old 14th May 2013, 03:48 PM   #968
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I went through this last week. Aren't the TO-247 supposed to be wider than the TO-220?
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Old 14th May 2013, 03:51 PM   #969
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Yes they are, but these will completely cover the exposed metal back of the TO-247. I have 8 of them in service right now. You need a isolater that is about 3/4" x 1"
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Old 14th May 2013, 04:04 PM   #970
bcmbob is offline bcmbob  United States
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Thanks, The only other option I could find was at Mouser but didn't want to pay shipping for such a small order. Says they are 18.8 mm as opposed to the TO-220 at 13.84 mm. Maybe next order.
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