Baltacha is here on a week's trial while the club determine if he will be a useful addition to the squad.
The Buddies manager Tom Hendrie said: "The board will not run into a debt situation which will threaten the club and if it means we have to lose more players we will."
Strachan said: "We are having a look at him and he has done OK. He can play right-back or centre-back and has good feet."I have watched him for the Scottish Under 21's and I know Tom Hendrie, the St Mirren manager. I have spoken to him about Sergei who is still under contract there. We will have to see how it goes."