Use of seperate preamp with an integrated amp

I have a Conrad Johnson Premier 3 that I would like to be able to use its phono stage connected to an integrated amp. I have been told that I could run a RCA from the CJ's tape output into a line level input on the integrated to use for this purpose. I alternate between two integrated amps (Rogue Audio Cronus Magnum II and a Tandberg 3012A). Would I be able to do this? I don't want to risk damaging any of these amps (obviously).