Agreed its VERY tough to find a set of headphones that meets the K3 requirements.
This last field day I'd not yet changed my caps out and so I brought along a headphone amplifier that had an input impedance of 18Kohms and used that to drive my headphones. For another point of reference the caps that I installed in my K3 are Mouser part number: 871-B41112A3107M000. The only annoyance is that they start shipping the Mouser catalog. I thought it was annoying enough getting them at work.... But now I get them at home too. ;) ~Brett On Sun, 2009-08-23 at 22:23 -0400, Paul Christensen wrote: > > However being that you mention the K3 you'll want to either ensure you > > use higher impedance headphones or ensure that you change the series > > caps in the headphone circuit from 10uF to 100uF. > > Not too many high-end headphones will be available with an average Z of more > than 100 ohms across the audio spectrum. With the stock 10uF caps in the > K3, one would need to find a set in the area of 200-ohms or so to extract > decent low-end response. When you get up in that Z range, the available > headphone options quickly diminish. > > Several SMD replacement caps exist for the K3's headphone coupling caps at > C9, and C13, but Mouser P/N 647-UUD1A101MCL (made by Nichicon) is a good > choice at only 65-cents each. > > Paul, W9AC > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
