I think the tape pre in question will provide enough gain to do this. Would there be any other reasons or issues you can think of?
Reel to Reel Mods
I have an Otari MX5050 BII-2 R2R, and I am thinking about wiring a pair of rca's directly to the playback head. Then connecting the rca's to an external tape pre, and then using the tape/source switch to turn off the outputs. In the hope that the playback head will provide enough output to send the signal to the tape pre. Any thoughts?