> The reason for using 12 Vdc, is that you can pick them up, and 24 Vac CT > transformer, on the cheap
That's a good point. So use two of them. One to power a high current amp that produces a 12V AC signal from a high precision 60Hz input. Then the other to convert the 12V to 120V. This avoids the need for a high voltage DC power supply. Likely cuts the total cost in half at least. So just use use 12V supply to the amp and then a cheap 12V transformer connected "backwards" to step up to the desired voltage. The second advantage of this design is that you can connect a lead acid gell cell battery in parallel to the 12V DC supply and if the AC fails the battery will power the amp for a while. This way there is no switching so the 60Hz wave remains continuously even if AC mains fails. This is something most UPS don't do but for this application you don't want the 60Hz sine wave to be broken. As long as the load is only a few milliamps of AC this should not be hard to do. -- Chris Albertson Redondo Beach, California _______________________________________________ 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.
