Fake c64 power supply!?!

[Guest perplx]

In the hopes of making a quadruple midibox SID, i bought a c64 power supply off eBay. When I get it, I notice it's not a Commodore-brand power supply! It reads:

MAXTRON

MODEL PS-01

POWER SUPPLY

INPUT:117V 60Hz 40W

OUTPUT: 5V DC 1.7A

              9V AC 9VA

(pinout diagram consistent with Thorsen's schematics)

Are those specs the same as a REAL commodore psu? I havent found a c64 yet, so i can't test it... :'(

[Wilba]

The output ratings are the same as mine, and the same as the specifications (see below). Double-check the voltages with a multimeter, just in case. There seems to be great variation in C64 power supplies, which makes sense since they're usually country-specific.

My one is a black box with ventilation slots, huge transformer and a 7805 regulator with a massive (and I mean massive) heatsink. The schematics show that the older ones used a transistor to regulate voltage (apparently the transistor and 300k resistor can be replaced with a 7805).

http://www.funet.fi/pub/cbm/schematics/computers/c64/c64extps.gif