If your unit is equipped with an optional insert point on the side chain, which increases the amount of “places" where the output of the FAIRCHILD 670 mkII can go to, please be aware that the Insert send is also the FAIRCHILD 670 mkII output, and that any Valve unit that uses output transformers can get damaged if you run the signal into a short.
Therefore, you must be very careful with your wiring throughout your studio and make sure all your XLR connections are tested before using your unit.
Also, try to use proper Balanced connections throughout to avoid any degradation of the signal when using the inserts, especially on semi-pro mixing desks where you could get earth loop grounding issues. Please contact me to discuss grounding options if you are not sure.
I always advise to not patch, insert or plug any bantam or jacks whilst the unit is playing music, some patch-bays can momentarily short the signal when inserting a Bantam, which could destroy the output transformer, as explained above, especially in unbalanced situations…
Also :
A lot of modern Patch-Bays can be configured easily with normalised or isolated contacts by simply moving jumpers around or linking a few solder points; So it is imperative that you make sure you check how the normalising of your Patch-Bay is configured before you install any of your outboard/ FAIRCHILD 670 mkII.
If you choose to have the top row as your outputs and the bottom as your inputs (or vice-versa), please make sure not to use any normalising configuration at all, otherwise your Patch-Bay could make the signal loop between the input and the output when nothing is patched, which is likely to destroy your output transformers.
