Hmmm, and here I thought it meant "Old Timer", since that really relates to me. Of course, "Off Topic "does too
Chas -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Walter Underwood Sent: Wednesday, January 09, 2019 11:59 PM To: [email protected] Subject: Re: [Elecraft] Sorta OT - assistive technology assistance needed Funny, I just realized I was misreading “OT” as Occupational Therapy. Our son just finished OT grad school and is studying for the board. Of course, assistive tech is a big part of occupational therapy. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jan 9, 2019, at 5:42 PM, Dave Fugleberg <[email protected]> wrote: > > I usually like to build stuff when I can, but I have to agree with the > others who suggested a commercial mixer. They are cheap and work well. > I recently bought a small behringer USB mixer for under 50 bucks for a > project at work. It acts as a USB sound card, so you can mix audio to > or from the PC with other sources. You can adjust levels, > equalization, and position (left/right) for each source. > I doubt one could homebrew an equivalent unit any cheaper. > Good luck with your project! I’m sure your friend will appreciate it. > > On Wed, Jan 9, 2019 at 5:30 PM Don Wilhelm <[email protected]> wrote: > >> James, >> >> There was a homebrew headphone mixer in the ARRL Handbook sometime >> back >> - simple, with op-amps to isolate the sources. >> >> However with the advent of 2 to 5 input mixers being available in the >> $20 to $60 range (see Amazon), it seems foolish to consider building >> your own - drilling the enclosure for the potentiometers and jacks, >> building the board, mounting things, etc. will take more time and >> effort than is reasonable unless you really like doing those things - >> and it will likely cost more than buying one already built. >> >> The nice thing about a mixer is that you have control over the level >> of each input as well as an overall output volume control. >> >> 73, >> Don W3FPR >> >> On 1/9/2019 6:03 PM, Richards wrote: >>> Good Day. >>> >>> Background: >>> >>> I am assisting a blind ham who also suffers some hearing loss. I >>> suggested using headphones to attenuate ambient environmental noise >>> as he operates. The rub is, he needs to hear both his receiver AND >>> his computer (which provides audible feedback when logging contacts >>> and performing other duties.) >>> >>> Question: >>> >>> Can anyone suggest a simple passive (or active) mixer circuit schema >>> I can build for him to safely mix audio signals from his transceiver >>> headphone jack with audio signals from his computer sound card >>> headphone jack? >>> >>> Discussion: >>> >>> While there are multiple commercially produced simple and complex >>> mixing products in the marketplace, I would prefer to build an >>> inexpensive, small footprint solution we can easily incorporate in >>> his station to minimize clutter and the number of cables, jacks, and >>> controls -- he >>> contends with plenty of that already. I suppose one solution might be >>> a simple Y-adapter cable, but that seems too easy and I wonder >>> whether we should isolate the signals and/or grounds in some way? >>> (e.g., I do not wish to cause any "Pin-1" grounding issues, and >>> etc.) >>> >>> Any traction? Can anyone point me to an appropriate circuit schematic >>> or other resource? I don 't mind doing homework, and while I enjoy >>> building stuff and I am familiar with the basic concepts involved, >>> I could use a leg up on this project, especially to keep it simple >>> and easy to build and implement. Please reply off list if this >>> question is too far off topic, although I suspect there are many >>> hams who might be interested in the result, besides similarly situated >>> disabled operators. >>> >>> Thank you - James - K8JHR - >>> --------------------------------------- >>> >>> >>> >>> >>> ______________________________________________________________ >>> 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] >> ______________________________________________________________ >> 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] > ______________________________________________________________ > 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] ______________________________________________________________ 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] ______________________________________________________________ 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]
