Jerry, I have a DAS-46 that I picked up but have yet to work on it. I would like to get a copy of the LTSpice chopper model that you developed.
Thanks, Randy Evans [email protected] On Mon, Feb 13, 2017 at 4:57 PM, Jerry Hancock <[email protected]> wrote: > Hello, again all: > > Interesting thing happened today as the MFE3002 FETs showed up. You > might remember I was using the NTE/ECG 220 knock offs. I plugged them > into the board tightly and I wasn’t able to zero it. I then put the ECG > knockoffs back in and they zeroed. I thought, what the heck, I paid for > them, so I put the MFE3002 back in this time reversing them as the board > uses two. The risk in touching these is they are very, very static > sensitive. It then zeroed with the devices reversed. The circuit must be > sensitive to the gate or base voltage somehow. I don’t know, but it zeroed > so I soldered them in and the board is working fine now. It zeros and the > +/- (normal/reverse) voltages are balanced. > > I can now say I am the expert on the DAS-46, DAS-47 and 57 CSA assembly! > > Again, if anyone wants to play with the chopper model in LTSpice, please > drop me a note. I am adding part numbers where available, etc. This will > make it easy for those knuckleheads that follow me. Now I know why they > wanted $400 plus 10 weeks for another one! > > Jerry > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
