[Elecraft] Line In cabling

[JEAN-FRANCOIS MENARD]

I did something similar as a project:  
http://homepage.mac.com/jfmenard/PhotoAlbum21.html

Just exclude the PTT control part, the rest is for connecting a line  
out to the line-in of your computer or stereo system. I use a 600 ohm  
to 600 ohm transfo to isolate the circuit, etc..


Le 04-07-16, à 17:50, Don Brown a écrit :

> Hi
>
> Although you can use a standard stereo mini plug to mini plug to  
> connect the headphone jack to the sound card, it is not the best  
> choice. The headphone jack has some filtering that will roll off the  
> high end. I built up a little box with a 4 ohm load resistor and a RCA  
> jack so I can connect a cable to the external speaker jack with a RCA  
> plug to mono mini plug. I also built a cable with the little two pin  
> speaker connector like in the K2 on one end and a RCA plug on the  
> other. The 4 ohm resistor is connected to a stereo jack on the other  
> side of the box with two 1K resistors in series with each channel. The  
>  stereo jack then connects to the sound card with a standard stereo  
> mini to mini plug. This works with line level inputs on the sound  
> card. If your computer only has mic level inputs then you will need to  
> build two voltage dividers between the 4 ohm resistor and the stereo  
> jack, one for each channel. Something like a 10K and a 1K should work.
>
> Don Brown
> KD5NDB
>
>
>   ----- Original Message -----
>   From: Wingkeel at aol.com<mailto:Wingkeel at aol.com>
>   To: elecraft at mailman.qth.net<mailto:elecraft at mailman.qth.net>
>   Sent: Friday, July 16, 2004 4:22 PM
>   Subject: [Elecraft] Line In cabling
>
>
>   Hi everyone,
>
>        I am going to use the Spectrogram software to align my K2.   
> When I build
>   the cable to go from the earphone jack to the Line In on my sound  
> card, do I
>   wire it for mono or stereo?  Mono or stereo plugs?  Speaker wire or  
> thin coax?
>
>                                          Thanks
>
>                               Terry Southern de KC0QZX
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===============================================
Jean-François Ménard / VA2VYZ
va2vyz at rac.ca

Club d'Astronomie Amateur de Sherbrooke
Club Radio Amateur de l'Estrie

Mon site web personnel : http://homepage.mac.com/jfmenard
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