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The 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.
Hi, So does that mean that if we have a GX4000 without the RF output we can continue to use the original Amstrad PSU?
my 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.
Gerald 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?
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