There are no phantom blocking caps... I am curious how this works.
This a commercial product and it indeed works fine and I have visually verified there are no added caps on board for this purpose. What gives?
I suspect it has to do with the additional circuitry between the +55 in and the gain control. It has a traditional phantom supply voltage developed elsewhere from +75.
Any ideas?
I tried to attach a simplified pic but the folder is full only brings an error.
Here is the link to the schematic.
https://ia800201.us.archive.org/23/items/symetrix_421M_1C00_sch/421M_1C00_sch.pdf
Regards
This a commercial product and it indeed works fine and I have visually verified there are no added caps on board for this purpose. What gives?
I suspect it has to do with the additional circuitry between the +55 in and the gain control. It has a traditional phantom supply voltage developed elsewhere from +75.
Any ideas?
I tried to attach a simplified pic but the folder is full only brings an error.
Here is the link to the schematic.
https://ia800201.us.archive.org/23/items/symetrix_421M_1C00_sch/421M_1C00_sch.pdf
Regards