SHELDAHL INC <SHEL> 2ND QTR FEB 28 NET Shr 24 cts vs four cts Net 663,000 vs 109,000 Sales 20.5 mln vs 13.9 mln Six mths Shr 48 cts vs nine cts Net 1,311,000 vs 255,000 Sales 43.2 mln vs 30.0 mln Avg shrs 2,719,205 vs 2,804,048