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Re: Combining audio from two sources

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Thomas & Erin Skoropad <teskor@tbaytel.net> writes:

< Hello All,
< 	Just contemplating combining audio from two sources into a
< stereo headset. The sources would be a handheld scanner and a small
< AM/FM Walkman. I presume some sort of mixer......? It would have to be
< portable and light. Intended use would be for monitoring aircraft
< frequencies while mowing a full size airstrip, and yet being able to
< listen to music to aleviate the boredom. Any suggestions?
< 	Thanks in advance.

``an expandable headphone mixer'' will allow the simultaneous monitoing of up to three rigs. The circuit is in ARRL Handbook 1998 section 22.31 .  The main component is a lm386 as a mixer with tone controls and it operates from battery. I would try using a tl074 myself, but the circuit looks good.

The mixer was built by Mark Wilson, AA2Z at the ARRL labs. You can probably get the circuit from the ARRL.

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Re: Combining audio from two sources Steve <loft@centurylink.net> - 2018-05-11 02:41 -0400
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    Re: Combining audio from two sources Killa “zzDJChris” McKillington <citabornot@gmail.com> - 2023-01-20 18:45 -0800

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