I'm in the process of buying a Thunderbolt, and will need to provide it with some volts.
I sat down over the weekend to design a linear supply for it. Initially things looked OK using a 12-0-12 transformer, and a few IC voltage regulators, but then I did some worst case design and dissipation analysis, and found that I needed to use a 15-0-15 transformer to allow for a -10% mains variation, and add pass transistors and lots of heat sinking to all the regulators to allow for a +10% mains variation. Add to that transformer regulation issues (over-size transformer), the time to design the PCB and the cost of getting it made, and things started to look expensive :-(. I can probably source a linear supply on eBay, but these are typically pretty large and heavy. For example: eBay item number 330201077319 So is it reasonable to use an SMPS, and add additional filtering to the output? Typically these talk in terms on 150mV ripple & noise which I need to reduce by a factor of ten or better. If you have been there, done that, I'd be interested to hear what you did. Thanks Dave Partridge _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
