Chris, I think this is one of those "your mileage may vary" things. With this older HP laptop, I have a bit of overdrive going the other way - from the computer to the Line In on the K3. Adding an attenuator allowed the me to get better control (more granularity) over the laptop's audio out and at the same time lowered the drive level at the K3.
You can build a Pi or T attenuator for either in or out at the computer. A fairly good calculator for this can be found at http://www.daycounter.com/Calculators/PI-T-Pad-Attenuator-Calculator.phtml FWIW, I designed and built a 5 dB attenuator for 1k line impedance. It seems to work and allowed volume adjustment to occur in smaller steps, which in this case is what was necessary to combat too much drive at lower Line In settings at the K3 (setting 4 was as high as I could use it, and setting it at 3 was too low). You can also buy a better sound device like the EMU-0202 from Creative Labs. This approach has the additional benefit of keeping digital modes' sound separate from whatever your computer o/s and applications generate. 73, matt W6NIA K3 #24 On Thu, 30 Apr 2009 10:53:38 +1000, you wrote: >Hello, > >I want to connect K3 audio line out to a Toshiba laptop which only has a 3.5 >mic socket for audio in. >Does anyone have recommendations for attenuation/impedance matching? >I was thinking of a simple votage divider. > >Thanks, > >Chris VK2LCD > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
