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What is "type-wri-toon?" It doesn't show up on a search. Steve Smolian ----- Original Message ----- From: "Ted Kendall" <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, November 04, 2009 7:30 AM Subject: Re: [ARSCLIST] power line frequency > At the risk of telling everybody something they already know, the > Tonschreiber had a wide range of capstan speed to facilitate its purpose > in life, which was to protect U-boats from the Allies' Huff-Duff detection > apparatus. This, using two orthogonal antennae and a Lissajous display, > could generate a practically instant fix from a U-boat transmission. The > solution adopted was to record Morse at slow speed, replay at high speed > to keep the transmission as short as possible and restore pitch with the > rotating head-drum. > > > ----- Original Message ----- > From: "Shai Drori" <[log in to unmask]> > To: <[log in to unmask]> > Sent: Wednesday, November 04, 2009 7:08 AM > Subject: Re: [ARSCLIST] power line frequency > > >> The solution is very simple. The capstan of the Tonschreiber did not run >> off the incoming AC but had an oscillator and amplifier as a servo. It >> could run at any speed from I think 9 to 130 cm/sec. >> >> Richard L. Hess wrote: >>> At 07:09 PM 2009-11-03, you wrote: >>>> From: Patent Tactics, George Brock-Nannestad >>>> ....SNIP..... >>>> The story continues. I would not be surprised to learn that northern >>>> Italian >>>> records were cut with machines run off 14 Hz or 16 2/3 Hz, which were >>>> in use >>>> for traction purposes. Let us see if a type-wri-toon will work here: >>>> ;-) - >>>> yes, it did. >>> >>> Hi, George, >>> >>> One thing that intrigued me is that the Tonschreiber version of the >>> Magnetophon which was analyzed in depth after WWII by some Army >>> Engineers who appeared to do a good job apparently could work from 25-60 >>> Hz. >>> >>> Cheers, >>> >>> Richard >>> >>> >>> >>> Richard L. Hess email: [log in to unmask] >>> Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX >>> Detailed contact information: >>> http://www.richardhess.com/tape/contact.htm >>> Quality tape transfers -- even from hard-to-play tapes. >> >