When I need to drive two sets of headphones, I use a $25 Behringer HA400 headphone distribution amp.
https://www.amazon.com/Behringer-HA400-Ultra-Compact-4-Channel-Headphone/dp/B000KIPT30 wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jan 16, 2019, at 7:36 AM, Don Wilhelm <donw...@embarqmail.com> wrote: > > The K3/K3S Line Out already has isolation transformers internal to the K3. I > do not understand any need to put additional transformers in the audio > path(s). > > What happens if you cable to LINE OUT signals to a computer soundcard (with > both left and right channels - some only are one channel if the input is set > for MIC)? You should hear the main RX in the left channel and the SubRX in > the right. > > Your external transformers/cabling raises the question of "is it the K3S or > is it your external devices that are causing the problem". > > Time to strip everything down to the essentials and begin to determine where > the "failure" is occurring. Test one thing at a time. > > 73, > Don W3FPR > > On 1/15/2019 8:00 PM, Dave Sublette wrote: >> My K3s arrived over the weekend and I have been setting it up. I am using >> the rear Audio jacks to drive either headphones, or the Line out to drive >> an amplifier and two speakers in the stereo mode. >> The headphone jack has stereo output ok. But the line out only has right >> channel audio. Left channel has nothing but a low hum. >> I am testing them one at a time, using the same cable. So it is not a case >> of a bad cable. The plug inserts to the same depth in both the headphone >> and line out jacks, so I believe the plug is properly inserted, >> I have been through both the Main Menu and Config menus, item by item. I >> see nothing that would give the option to turn off the left channel of the >> line out. > ______________________________________________________________ > 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
