CurtZHP
Well-known member
Got it all hooked up again tonight.
Nasty ground-loop-type hum going on. It gets far worse when I switch on the phantom power, but at least this time I can actually hear the mic.
A few questions for the time being....
1. Where should the phantom power ground be connected in relation to the other grounds?
2. All my connections from the audio circuit to the panel controls are shielded cable with the shields connected at one end only. Does it matter which end?
3. Should the case grounds on the transformers be connected to anything? I currently have them connected to the same ground as the rest of the audio circuit.
4. What considerations should I take into account regarding the location of the first stage grid resistors? The first stage in general with regard to the power supply?
Nasty ground-loop-type hum going on. It gets far worse when I switch on the phantom power, but at least this time I can actually hear the mic.
A few questions for the time being....
1. Where should the phantom power ground be connected in relation to the other grounds?
2. All my connections from the audio circuit to the panel controls are shielded cable with the shields connected at one end only. Does it matter which end?
3. Should the case grounds on the transformers be connected to anything? I currently have them connected to the same ground as the rest of the audio circuit.
4. What considerations should I take into account regarding the location of the first stage grid resistors? The first stage in general with regard to the power supply?