Article View: sci.electronics
Article #2710Re: Sony walkman antenna
From: Frank Ball
Date: Fri, 10 Apr 1992 16:53
Date: Fri, 10 Apr 1992 16:53
35 lines
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2299 bytes
*>When I opened my walkman radio I was surprised to find that it *>had no AM antenna. I understand that the antenna is part of *>the earphone cord, but how does this work? Also how could *>I attach a secondary FM or AM antenna to make the reception *>better? * *As I understand it, there is no provision for any additional *antenna, the Walkman was designed (?) as you have discovered *to use the earphone cord as the antenna. I do not find it *particularly efficient except in areas of high signal *strength, and even then the way you sit or walk can affect the reception. Yes they are not very sensitive. Just an interesting note: I have noticed that when I go shopping for headphones, most of them come with either 3 foot or 9 foot cables. A 3 foot cable is about 1/4 wavelength for the FM band, a 9 foot cable is about 3/4 of a wavelength. Both of these lengths make a good antenna. A 6 foot cable would be 1/2 wavelength and be a terrible antenna. So some thought has gone into it anyway. *I too would like to know if anyone has foung a solution to this *problem. I haven't tried, but I would think that if you opened up the unit and took a look you should find TWO connections to the headphone jack: the audio to the headphones and the antenna connection. You could disconnect the antenna wire and and an antenna jack to the radio. An external antenna would restrict my moving around so I haven't tried it. If you don't mind being tied to one spot get some headphones with a 9 foot cable and run the cable over the top of your desk or something. Frank Ball 2LR-D frankb@hpsad.sad.hp.com Hewlett Packard pyramid!hplabs!hpsad!frankb 1212 Valley House Drive (707) 794-4168 work (707) 538-3693 home Rohnert Park CA 94928-4999 KC6WUG Seca 750 XT350 IT175 I'm the NRA.
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From: frankb@hpsad.sad.hp.com (Frank Ball) Date: Fri, 10 Apr 1992 16:53:03 GMT Subject: Re: Sony walkman antenna Message-ID: <1840066@hpsad.sad.hp.com> Organization: HP Signal Analysis Division - Rohnert Park, CA Path: arc1-ca.pugleaf.net!sparky!news.UU.NET!haven.umd.edu!darwin.sura.net!mips!sdd.hp.com!hpscdc!hplextra!hpl-opus!hpnmdla!hpsad!frankb Newsgroups: sci.electronics References: <1992Apr4.152438.16307@hamblin.math.byu.edu> Lines: 35