At 01:59 PM 2/13/2006, Goran Finnberg wrote: >No rocket science for sure since everything that goes at 1X speeds works >at 128X speed too. Thanks for the correction. I should look at the math before typing. How do the instrumentation recorders get the wider bandwidth? Do they have narrower gap heads or just the HF details you described for duplicators? Cheers, Richard Richard L. Hess email: [log in to unmask] Vignettes Media web: http://www.richardhess.com/tape/ Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX Detailed contact information: http://www.richardhess.com/tape/contact.htm