I have an RP3 with 24v motor.
As a DIY project, I am looking to build my own version of the Rega TT PSU. I had some hints over on PFM that it is possible (but maybe not economical!) but I can not find any details.
Anyone tried this? Anyone got any schematics to help me?
As a DIY project, I am looking to build my own version of the Rega TT PSU. I had some hints over on PFM that it is possible (but maybe not economical!) but I can not find any details.
Anyone tried this? Anyone got any schematics to help me?
24VRMS is ~68VPP so if you are going to generate it directly (no xfmr) you will need 75-80VDC rails (±40VDC will work nicely if you don't want to use a coupling cap on the output). There are some single chip amps out there that will work from 80V rails (either single ended or dual polarity) such as the LM3886. There are also a number of LM3886 based brick amps on e-Bay that might fit the bill.
You can generate a 60Hz sine wave using an opamp, a function generator (XR2206 or 8038) or with a DDS chip. There are also a number of DDS projects on e-Bay, but the frequency resolution isn't that great.
If you get tired of messing around, take a look at these:
Phoenix Engineering
You can generate a 60Hz sine wave using an opamp, a function generator (XR2206 or 8038) or with a DDS chip. There are also a number of DDS projects on e-Bay, but the frequency resolution isn't that great.
If you get tired of messing around, take a look at these:
Phoenix Engineering
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