blessing - Do you say Shechiyanu on a used tallis you tied new tzitzis onto?

If you tied new tzitzis on an old beged, do you recite Shehechiyanu on the tallis?

Answer

No you don't, you only make shechiyanu on a new Tallit (when you put on the tzitzit), but never on an old one. See Mishna Berura OC 22 sif katan 2,

אם עשה ציצית בבגד שהיה לו מכבר אף שלא היה בו ציצית מעולם אין צריך לברך שהחיינו

If one makes (attaches) tzitzis on a garment that he already had, even if tzitzis had never been attached to it, one does not have to bless shehecheyanu