Archive of the former Yahoo!Groups mailing list: MOTM

Hi Jim,

 

At a guess I’d say the MOTM modules use an average of approximately25 ma @ 15 volts per module.  25 ma x 45 modules is 1125 ma  or 1.125amps. Even if you bump up by 40% more amperage for good measure you are stillonly up to a hair over 1.5 amps.

 

I recommend that you consider saving yourself some money andspace in your cabinet and get the HCBB-75W-AG which is 1.5amps @ +/-15 and 6 amps @ +5 and $75 cheaper than the HDCC-150W-AG youare considering.

 

Do I need toreplace capacitors on the MOTM distribution boards??

Probably not since caps are rated for their voltage handling andthe voltage isn’t changing but Paul will have the best answer on this(and Paul would have the best answers on all of these questions but I wannahelp! He’s too busy soldering anyways!  ;-)

 

Do I need toswap the switch & fuse assembly??

Paul recently posted  the models of the related parts inthe MOTM 900 power supply:

 

Carling Switch Model #62115919-0-9-V, Allied ElectronicsStock #683-2007.

The fuse/power inlet is Digikey #Q203-ND.

 

With that you could look up the specs of these parts and compareto the requirements of your proposed power supply.  Here is a page youmight find useful: http://www.powerstream.com/Amps-Watts.htm

 

I’m guessing that youwont need to change these out at all but it doesn’t hurt to verify tomake sure you are set up correctly.

 

 

Do I need touse a different type of fuse (if so what value)?

Probably. The PowerOne supplies have the recommended fuse valueswritten on the outside of them.  Radio Shack, Home Depot etc carry fusesso unless you live way outside of a big city you should be able to find some onthe day you need them.

 

Best of luck!

 

John L Rice

 

PS – I recently finished my ‘DIY’ PowerOnepower supply. A couple pictures are in the photos section for this mailinglist.