Trying to repair a v72 rack job. Seems like at least a semi professional build.
Both preamps sound great. The problem is with the polarity switch. When engaged the gain drops and becomes distorted.
The polarity flip is on the input and appears to be wired correctly. I've attached a quick sketch of the input.
+48v switch ties into the switch via 6.8k resistors.
Any idea what might be causing the problem? Source is balanced; cables are balanced. Scope confirms what I was hearing.
Thanks for any input!
Both preamps sound great. The problem is with the polarity switch. When engaged the gain drops and becomes distorted.
The polarity flip is on the input and appears to be wired correctly. I've attached a quick sketch of the input.
+48v switch ties into the switch via 6.8k resistors.
Any idea what might be causing the problem? Source is balanced; cables are balanced. Scope confirms what I was hearing.
Thanks for any input!