kdawg
Well-known member
I finally started using my stereo PQ1549 more and realized I have a low hum going on with both channels. I am using the Mini PSU w/18v regulators. Moving the toroid has no affect on anything. I also disconnected one channel to make sure it wasn't some kind of ground loop between the two.
Now on the Gyraf's Mini PSU, I have no connection to the 0 (ground?) on the AC input side. Should that be chassis grounded, or some kind of center tap to my toroid? (I'm only using one out of two windings, the other winding has no connection) The output is of course using +/- 18VDC and ground to the PCBs. On the scope I do see a little bit of sawtooth waves. Eq does work great, just some annoying hum. Thanks for the help.
-kdawg
Now on the Gyraf's Mini PSU, I have no connection to the 0 (ground?) on the AC input side. Should that be chassis grounded, or some kind of center tap to my toroid? (I'm only using one out of two windings, the other winding has no connection) The output is of course using +/- 18VDC and ground to the PCBs. On the scope I do see a little bit of sawtooth waves. Eq does work great, just some annoying hum. Thanks for the help.
-kdawg