* Spot gold may revisit Sept. 20 low of $1,741.86/oz - technicals * Dollar eases off one-month peak (Adds comments, updates prices) Sept 23 (Reuters) - Gold prices fell on Thursday as an interest rate hike signal from the U.S. Federal Reserve dented the appeal of the non-yielding bullion, although a retreat in the dollar limited the metal’s decline. Spot gold was down about 0.3% at $1,763.50 per ounce by 0644 GMT, while U.S. gold futures slipped 0.8% to $1,764.20.