Mono Tuner output into Stereo Input


I have an old mono tuner made by HH Scott.
& It has a single output. Is it kosher to run a y adapter from the single Tuner output
into a pair of cables, & feed 1 into Right & 1 into Left
on the Preamp?
socoaste
Or rather than use a y-adaptor, you can buy a y-cable that will do the same thing with one less connection. It isn't something you need to spend a lot of money on.
Depending on the out-put of the tuner and the in-put of your pre, it should work fine. Of course, you'll have two channels of mono, not true stereo.