LF DXers like to record their catches too; folks have found that a standard modem transformer works well as an isolation transformer from the radio to the recorder or computer. If you have an old defective modem card, you can use that tranformer. Some folks unsolder it; others simply hacksaw the transformer intact from the board and solder to it. A standard 600 ohm : 600 ohm transformer available by mail order, or possibly from Radio Shack is the same thing as a modem transformer, too. 73, Steve
----- Original Message ----- From: "Nick Hall-Patch" <[EMAIL PROTECTED]> To: "Mailing list for the International Radio Club of America" <[email protected]> Sent: Monday, February 04, 2008 7:49 AM Subject: Re: [IRCA] Recording Ultralights > At 11:58 AM 2/4/2008, you wrote: > > >>Guy Atkins reported a failure (generated interference) recording the >>output of an Ultralight using his otherwise very nice MP3 >>player/recorder, the iRiver X20. Recording has become such an >>important dimension of our hobby over the last twenty years or so >>that I'm a bit concerned. Guy, did you try a long patch cord and a >>ferrite choke on the cord??? >> >>I also wonder about using a long patch cord to a laptop, probably >>with a ferrite choke. Personally, I'd like to start using Ultralights >>in GY DXing with timed TOH recording. Solving the "battery problem" >>with an ultralight is fairly easy. Solving the interference problem >>may not be. >> >>HAS ANYONE BESIDE GUY TRIED TO SOLVE THIS PROBLEM YET??? > > > I had a similar problem recording from a Sony ICF2010 to a > laptop. Using an isolating audio transformer between the Sony's > recording output and the audio input of the laptop helped quite a > lot, as did a long cable to get the Sony's antenna away from the > noise of the laptop. Would need to look through what is laughably > referred to as "my documentation" to see what I used for a transformer, > though. > > best wishes, > > Nick > > > > > _______________________________________________ > IRCA mailing list > [email protected] > http://montreal.kotalampi.com/mailman/listinfo/irca > > Opinions expressed in messages on this mailing list are those of the > original contributors and do not necessarily reflect the opinion of the > IRCA, its editors, publishing staff, or officers > > For more information: http://www.ircaonline.org > > To Post a message: [email protected] > _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
