Started by gerald, 23:04, 16 May 15
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Quote from: gerald on 23:15, 16 May 15The original Amstrad power supply is a 11V 500mA stabilised power supply, using a 220V AC input.From oscilloscope trace under load, it seems to use a full diode bridge and a 3300µF filtering cap.Powered with a 230V main, the output voltage is : unloaded : 15.4V DCunder load (415mA) : 12.1V DC + 1V AC ripple.With a 240V main, DC voltage would go at 12.6V, which mean about 3.8W to dissipate for the 5V internal regulator instead of 3W at specified 11VWith a 9V DC regulated power supply, the dissipated power will be reduced to 2W.
Quote from: dxs on 00:23, 17 May 15Hi, So does that mean that if we have a GX4000 without the RF output we can continue to use the original Amstrad PSU?
Quote from: CraigsBar on 01:29, 17 May 15my 6v supply does not power it (well the LEDS on the C4CPC and console light, but nothing else) and I don't have a 7v supply.
Quote from: Crazy_Borg on 17:30, 17 May 15Gerald noted that the RF modulator may not work because of noise after the above described conversion, but who is using it anyway?Where you worried just about image stability or about a complete failure of the RF modulator because of it?
Quote from: dthrone on 12:23, 18 May 15Is it possible to recommend a suitable replacement brick, maybe with an Amazon (or equivalent) link or something?
Quote from: gerald on 13:09, 18 May 15You should look for something like this :9V 1.5A : High Capacity 9V Power Supply Adapter for Arduino: Amazon.co.uk: Electronics9V 1 A : GRV 9V DC 1A switching power adaptor 2.1x5.5mm Supply UK plug: Amazon.co.uk:Both of these have a 2.1mm centre pole that should prevent pluging them on the 5V input.
Quote from: chinnyhill10 on 13:49, 18 May 15Don't much like the look of either of those. One of them came apart when the user got it, a reviewer on the other measured the output and found it to be unstable. Fact is most of the generic PSU's on Ebay and Amazon are dangerous poorly made tat.The only place I can recommend for PSU's are RS. Yes they are expensive but their PSU's are both stable and unlikely to kill you or your equipment.Plug In Power Supply | RS Components
Quote from: Phantomz on 14:04, 18 May 15Have you got a link for the best one to get from there for the Gx4000?
Quote from: gerald on 15:37, 18 May 15Suitable 9V 1A from RS :5.5 x 2.1 with positive on centre poleEuro plug : ECP-11-9E | 9V dc, 1 Output, Switch Mode, ErP Compliant, Plug In Power Supply,UK plug : ECP-11-9U | 9V dc, 1 Output, Switch Mode, ErP Compliant, Plug In Power Supply,Selectable Plug : PSC12R-090 | 9V dc, 1 Output, Switch Mode, ErP Compliant, Plug In Power Supply,
Quote from: Phantomz on 20:55, 18 May 156128 Power Supply_zpszw8mmyw4.jpg Photo by Phantomz | PhotobucketIs this ok with the C4CPC in my 6128 Plus or do I need a different one?
Quote from: gerald on 21:35, 18 May 15 2.5 Amp more than enough for a 6128
Quote from: EgoTrip on 21:55, 18 May 15You don't need more than one CPC. You should give me one.
Quote from: CraigsBar on 23:17, 18 May 15Is that where I am going wrong... Damn, I got 2 CPC's, 3 plusses and GX4000. Not giving any away tho! I dod offer to give away a JXD S7800b but no one seemed too interested. Oh well.Craig
Quote from: Phantomz on 17:14, 20 May 15I decided to get one of these UK plug : ECP-11-9U | 9V dc, 1 Output, Switch Mode, ErP Compliant, Plug In Power Supply, ordered it yesterday in the afternoon around 14:30 and it turned up this morning just after 08:00 , so they are fast. I've tested it quick and it works fine, I don't know if it stays cool as haven't had time to play with it yet. Happy with the service though.
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