[Elecraft] K2 audio output question

[Chuck Chandler]

Thanks for the tip!

73 de Chuck, WS1L

chandlerusm at gmail.com


On Mon, Jan 4, 2021 at 12:35 PM Geert Jan de Groot <pe1hzg at xs4all.nl> wrote:

> On 04/01/2021 04:13, elecraft-request at mailman.qth.net wrote:
> > Is there a way to have both headphones and external speaker active at the
> > same time?  I'm thinking of being able to have audio for visitors while
> > still using headphones to copy.
>
> In addition to Don's response, you may want to look at this:
> https://www.w8fgu.com/pics/k2faob/w3fpr_K2%20audio%20Fix.pdf
> http://www.w3fpr.com/download_files/FP-CB%20mounting%20photos.pdf
>
> I have done this, using a piece of perfboard.
> To avoid shorts, in my case the PCB is in a piece of heat shrink tube.
>
> If you want a kit, check out https://www.w8fgu.com/k2_fixedaudio.html
>
> Instead of perfboarding it, I should have bought a kit from Dave, but
> sending a parcel by mail to PA0 would need me to mortgage my house, not
> to mention a lot of patience (another PCB ordered recently was stuck for
> *nine months* in Chicago).
>
> The advantage is that the 2nd output is fixed audio volume, so you can
> adjust the speaker audio and the headset audio separately.
>
> In my case (connecting multiple headsets on the speaker output) this
> approach has another advantage: I added audio sidetone to my K2 so that
> the people using headphones can hear eachother speak, yet the
> fixed-audio output doesn't have this, so there is no feedback from the
> speaker.
>
> When you use a speaker, make sure you use one that works well for SSB
> audio. For visitors, I would consider making some headsets available
> instead. SSB-via-speaker is more difficult to decode, SSB-via-speaker
> for people without SSB ears will just result in "there was a guy playing
> radio noise" at the exhibition.
>
> 73,
>
> Geert Jan PE1HZG
>
>
>
>