This post describes what I put together for my KX3. That specific amp is no longer available, but there are similar ones.
https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/ wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 14, 2022, at 4:50 PM, Andrew Moore <andrew.n...@gmail.com> wrote: > > KX2 arrived yesterday after a ~15 week wait, which was pretty much spot on > with Elecraft's original estimate. > > One of the best features is, especially for a compact rig with limited > dedicated controls, the ability to assign a programmable function button to > an otherwise buried menu feature. For menu features that are binary choices > (such as enable/disable CW transmit), not only does the PFn button activate > the menu item, but it also toggles the parameter and dumps you right back > into operating mode. For example, you can toggle between "CW transmit" and > "CW practice (no transmit)" by pressing only two buttons. No need to go > through deep menus. Kudos to KX2 designers for thinking ahead. > > One of the not so great features is the internal speaker. It's even raspier > and more distorted than the forward-facing one supplied with the KX3. This > is to be expected; there are design trade-offs and this rig wasn't designed > to be a desktop model with high wattage audio output. > > My typical use case for the KX2 is to listen to it in the background on the > desktop with good quality speaker audio, and then to switch to > headphones/earphones when in QSO. > > So I'd like to build an audio amplifier to convert the KX2 headphone output > levels to say 5 watt speaker output (one of the two channels will suffice) > for listening to relatively undistorted audio in the shack. A good starting > point is knowing what the output level and impedance is for the headphones > jack. I measured approx 20 mV P-P (impedance unknown) at an audio output > level around "AF 10" according to the KX2 display. Does this sound about > right? > > Bonus points: First QSO with the KX2 was from Maine to Bermuda at 1 watt. > > Thanks, > -Andrew NV1B > .. > ______________________________________________________________ > 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 > Message delivered to wun...@wunderwood.org ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
