Did a little testing, did a little thinking… First, I verified that the audio output from the KX2 was working; it drove a pair of headphones just fine.
Then I verified that the external mic input to the computer was working; I connected a real microphone and was able to record audio using Audacity. Then I thought about it, and realized that the KX2 output is STEREO, whereas the computer mic input is MONO. So I tried a MONO 3.5mm cable instead of the stereo cable, and voila! Audio going from the KX2 to the computer, verified by making a couple of FT8 contacts. Thanks to all that responded. FYI, this is a real minimal configuration. The “computer” is an Asus Transformer, 1 lb tablet running Windows 10, and the radio is a KX2. I can carry the whole shebang in one hand. Plan to use this with a Buddistick from French Polynesia, going to Moorea and Bora Bora next year. Probably won’t be able to work many NA with only QRP and a Buddistick, but I’ll see what I can do. Rich KE1B > On Sep 14, 2018, at 8:58 AM, Jack Brindle <[email protected]> wrote: > > Hey Rich! > > What make of computer? Is the port selected for input? If a Mac, the normal > selection would be the internal microphone, so you would need to go into the > System Preferences/sound panel => Input tabard select the external microphone > port. > Interesting that my MacBook Pro doesn’t show such a port, so I’m not really > sure what it takes to get it to show up. > > You also posted to the N1MM list, so I suspect you are using a Windows > machine. I can’t help you there, but look for some sort of input port sound > selection. > > Hope you get the issue solved quickly! > > 73, > Jack, W6FB > > >> On Sep 14, 2018, at 8:48 AM, [email protected] wrote: >> >> >> I am trying to connect a KX2 (which has a standard headphone output and >> microphone input on separate 3.5mm jacks) to a laptop that has an integrated >> (4 pin TRRS) microphone input and sound output. I have the adapter than >> converts the 4-pin 3.5 mm jack to two separate jacks, for a microphone input >> (to the laptop) and sound out (from the laptop). I connected those jacks to >> the corresponding jacks on the KX2, using stereo cables. This is the exact >> configuration as shown in Frank Cady’s KX2 book. >> >> On transmit, everything works fine. I can key the radio from N1MM, send CW >> (via KY commands), and send digital data (e.g., FT8) to the radio and the >> radio transmits everything fine. All levels can be adjusted to perfection. >> >> On receive, I’ve got nada. I can’t see any audio coming from the radio into >> the laptop. If I disconnect the external input, I can actually decode >> digital data with audio from the radio’s speaker, through the air, to the >> laptop’s internal microphone. Now, I can deal with the differences in >> levels, if necessary, but I’m not getting ANY audio from the radio to the >> laptop via the cabling. What am I missing? I’m hoping to make this work >> without lots of little adapter boxes, USB hubs, external codecs, etc. for >> very-portable operation. >> ______________________________________________________________ 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 Message delivered to [email protected]
