[ARC5] High current 28VDC power supply?

Adam Castellani adamcastellani at yahoo.com
Wed Dec 28 12:31:53 EST 2022


Hope the experienced and bright minds here might add their views on the suitability of this unit <https://uk.farnell.com/tdk-lambda/rws-600b-24/ac-dc-conv-1-o-p-24v-25a-600w/dp/2444011?st=600%20watt>, a 600 watt, 25 amp switcher adjustable from 21.6 to 27.6 volts for command and liaison set use. 

1) Do you think 25 amps will be enough to power both a DM-33 and single DM-32 simultaneously as part of a complete SCR-274-N? (actually the transmitter portion is SCR and the receiver portion and modulator are ARA ATA)

2) How about starting a PE-73 dynamotor to power a BC-375?

3) Could the 25 amp unit simultaneously power a BC-375 and BC-348 as part of a complete SCR-287? 

4) Would it have a hope of powering both an SCR-287 and an SCR-274-N at the same time?

In addition to the PP-1104-C units, which I wish were available in the UK, are there other ready built PSUs worth considering? 

The 25 amp models are available. Unfortunately, the next size up <https://www.farnell.com/datasheets/3651152.pdf> which is 1000 watts, 42 amps adjustable from 20.4 to 28.8 volts is on back order for a year. 

Thank you for your views and help. Photographs of these two projects are here <https://i.imgur.com/Tfeb5vg.jpg>, here <https://i.imgur.com/Bo124sl.jpg>, here <https://i.imgur.com/rLCeL3M.jpg> and here <https://i.imgur.com/95VhA7U.jpg>. 

Merry Christmas and Happy New Year,
Adam

*link from above: https://uk.farnell.com/tdk-lambda/rws-600b-24/ac-dc-conv-1-o-p-24v-25a-600w/dp/2444011?st=600%20watt

**25 amp data sheet: https://www.farnell.com/datasheets/2883301.pdf

***42 amp data sheet: https://www.farnell.com/datasheets/3651152.pdf
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