Re: [IRCA] Recording Ultralights

["Steve Ratzlaff" <steveratz@xxxxxxxx>]

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" <nhp@xxxxxxxx>
To: "Mailing list for the International Radio Club of America" 
<irca@xxxxxxxxxxxxxxxx>
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
>
>
>
>
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