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Post by Slinger on Feb 21, 2019 16:55:27 GMT
...for my router and my Gigabit switch.  MS-10D Dual output Regulator linear power supply use 30w pure copper transformer. LT1083 linear power supply board.Suitable for all kinds of TV set-top boxes, routers, network hard disk box, (and my favourite ) fever DAC ear the front-end equipment. All for a penny under sixty quid. I should have paid by card though. I didn't realise until it was too late that AliExpress was charging me £2.31 for the pleasure of using PayPal. The important numbers, though, are DC-12V / 4.5A (Max) A lot of the units I found were only rated 12v / 1A which could, theoretically, see the router which is marked at 1500mA, being underpowered. The switch, it seems, would actually be happy with 1A. Both are now overspecced though, which is highly preferable to the alternative. All I have to do now is to sit back and await the arrival of a slow boat aeroplane from China. Delivery time is quoted at 30-40 days, which is on top of 3 days "processing." |
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Post by John on Feb 21, 2019 17:17:47 GMT
It hopefully works well for you Paul.
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Post by MartinT on Feb 21, 2019 18:19:29 GMT
Nice, hope that works as well as my Chinese sourced dual 12V linear PSU.
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Post by Slinger on Feb 21, 2019 18:38:18 GMT
It looks quite "chunky" so I'm keeping my fingers crossed. At worst it can't do any harm, plus it will free up one mains socket.  |
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Post by MartinT on Feb 21, 2019 19:47:02 GMT
Is it branded Weiliang Audio like mine?
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Post by Slinger on Feb 21, 2019 20:14:53 GMT
Is it branded Weiliang Audio like mine? The sticker underneath (according to the pic on the website) says "TIANCOOLKEI TECHNOLOGY CORPORATION" and the retailer is "Music KTV Electronic Store." It's this one... |
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Post by MartinT on Feb 21, 2019 20:16:35 GMT
Ah, ok, they all look the same |
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Post by Slinger on Feb 21, 2019 20:17:22 GMT
Ah, ok, they all look the same Racist!  |
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Post by Slinger on Feb 21, 2019 20:20:15 GMT
I must admit, the R-Core transformer is what first attracted me to it, after reading a bit about them.
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Post by MartinT on Feb 21, 2019 21:35:40 GMT
Yes, the tranny does look good. Mine is this one...  |
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Post by Slinger on Feb 21, 2019 22:35:39 GMT
Yes, the tranny does look good. Mine is this one... I saw that one, and I think the main reason I passed it up was that the vendor didn't accept PayPal. DOH! I shall know in future. |
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Post by MartinT on Feb 22, 2019 6:16:42 GMT
That's strange - he certainly accepted PayPal from me. In fact, I don't think an eBay trader can NOT accept PayPal!
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Post by Firebottle on Feb 23, 2019 8:38:26 GMT
Be very wary of published Chinese specifications.
That power supply is actually capable of only 2.03 Amps output at 12V. Just over 1A per output as they are separate.
Where they get 12V at 4.5A max from I really can't comprehend. A rather larger supply I think.
Think about it, 12 x 4.5 = 54W. How is that possible from a 30VA transformer? That isn't even taking the conversion losses into account.
Most Chinese ads I see fall into the same trap. Take the transformer max current rating and multiply by 0.81 to get a correct figure.
So 2 secondarioes of 1.25A (15/12) = 2.5A x 0.81 = 2.025A
I have also noticed that both supplies shown don't have the case connected to the earth pin. Add a lead to the case folks.
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Post by MikeMusic on Feb 23, 2019 10:31:20 GMT
Thanks Alan
I won't take specs as correct in future !
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Post by julesd68 on Feb 23, 2019 10:44:27 GMT
Add a lead to the case folks. Thanks Alan - could you please clarify for the ignorant like myself, what kind of lead from where to where exactly?  |
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Post by Slinger on Feb 23, 2019 12:58:32 GMT
That's strange - he certainly accepted PayPal from me. In fact, I don't think an eBay trader can NOT accept PayPal! I ordered mine via AiExpress, Martin. |
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Post by MartinT on Feb 23, 2019 14:28:39 GMT
Ah ok, worth knowing. The HDMI board I ordered is coming from AliExpress.
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Post by Slinger on Feb 23, 2019 15:24:04 GMT
Be very wary of published Chinese specifications. That power supply is actually capable of only 2.03 Amps output at 12V. Just over 1A per output as they are separate. Where they get 12V at 4.5A max from I really can't comprehend. A rather larger supply I think. Think about it, 12 x 4.5 = 54W. How is that possible from a 30VA transformer? That isn't even taking the conversion losses into account. Most Chinese ads I see fall into the same trap. Take the transformer max current rating and multiply by 0.81 to get a correct figure. So 2 secondarioes of 1.25A (15/12) = 2.5A x 0.81 = 2.025A I have also noticed that both supplies shown don't have the case connected to the earth pin. Add a lead to the case folks. I assume a lead from the input earth to one of the pcb standoffs (they appear to be connected through the case, looking at the available images) will suffice to earth the case? |
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Post by Firebottle on Feb 24, 2019 7:16:37 GMT
Add a lead to the case folks. Thanks Alan - could you please clarify for the ignorant like myself, what kind of lead from where to where exactly? As Slinger says the lead should be from the middle earth pin on the mains in connector to a point connected to the chassis. To meet the regulations the lead should really go to a dedicated connection to the case, its own bolt with the anodising scraped away and a star washer to ensure good contact and prevent any chance of loosening. |
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Post by Slinger on Feb 26, 2019 18:27:43 GMT
Gentlemen, start your engines... Order time & date: 2019-02-21 08:12 China Post Registered Air MailShipment time: 2019-02-26 05:44:45 [China] Shipment ready for dispatch 2019-02-26 21:44:36 [China] |
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