Mad Hatter Posted June 19, 2010 Share Posted June 19, 2010 Can someone with an MBX Expansion set tell me the power requirements for the AC adapter (output volts, amps, jack size, etc). Thanks Quote Link to comment Share on other sites More sharing options...
+remowilliams Posted June 19, 2010 Share Posted June 19, 2010 9V DC tip positive 1.0A / 15W 1 Quote Link to comment Share on other sites More sharing options...
Mad Hatter Posted June 19, 2010 Author Share Posted June 19, 2010 Awesome! Thanks for the super fast reply. Quote Link to comment Share on other sites More sharing options...
unhuman Posted June 20, 2010 Share Posted June 20, 2010 Really? B/c 9V/1A = 9W... Interesting. 9V DC tip positive 1.0A / 15W Quote Link to comment Share on other sites More sharing options...
+remowilliams Posted June 20, 2010 Share Posted June 20, 2010 Really? B/c 9V/1A = 9W... Interesting. 9V DC tip positive 1.0A / 15W Just reading what it says on the sticker. Quote Link to comment Share on other sites More sharing options...
majestyx Posted February 1, 2019 Share Posted February 1, 2019 Does anyone know the size of the connector for the adapter? Quote Link to comment Share on other sites More sharing options...
blackbox Posted February 1, 2019 Share Posted February 1, 2019 I am using a 500mA Uniross multi adaptor, set at 9v, tip positive. The connector to the MBX is around 2.1 to 2.5mm female- that is, it has a central hole for the pin in the MBX unit to go into. I think probably 2.1mm but it isn't marked and I can't tell by sight. The documentation has nothing to say but I believe the DC in requirement for the MBX is a nominal 7.5V. It is just easier to get a 9v adaptor- there is an immense voltage regulator inside the MBX unit. s 1 Quote Link to comment Share on other sites More sharing options...
majestyx Posted February 1, 2019 Share Posted February 1, 2019 Okay, thanks. I have two 9V adapters, tip positive, but they're not 1A - the highest one is 800 mA - so I wasn't sure if that would work and didn't want to risk damaging by trying to use it, since yours is working at 500 mA. I'll try it when I get home from work tonight. Quote Link to comment Share on other sites More sharing options...
blackbox Posted February 1, 2019 Share Posted February 1, 2019 If you use an adaptor with a power rating a little too low, it gets hotter and may not last quite as long. If it is well underrated it could blow a fuse- or with modern imports, perhaps catch fire! I've been using the 500mA adaptor for many years and it barely gets warm. That said I can't recall using it for more than a couple of hours at a time. As my supply is unregulated, the voltage supplied to the MBX may not be 9v, but the voltage regulator in the MBX unit takes care of any overvoltage, and with a nominal 9v supply , there is enough headroom if the load causes the voltage to drop. Supply too much voltage to the MBX and the voltage regulator gets hotter- ultimately it would burn out- but I think there is quite a bit of room to play with. s Quote Link to comment Share on other sites More sharing options...
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