Audio mixers

[k6dgw]

On 7/3/2015 8:24 PM, Lyle Johnson wrote:
> Or, some guys just prefer to do it with paper and pencil.  I have lots
> of ebooks, but I often prefer to grab a physical, printed-on-paper book
> and curl up on the sofa and read.

That's why I bought Fred's K3 book spiral-bound to lay flat so I could
write notes in it.  Technology is great, and I'm not a Luddite, but I
really like to read the comics on a piece of newsprint with coffee in
the morning.
>
> Heck, I've even heard some guys are so stuck in the past they actually
> use CW on HF!!!!

I decided to do the Locust QSO Party [K6VVA] as a QRP Green Power entry
with my K2, A123 battery charged with my solar panel, and a paper log.
Didn't need a dupe sheet. :-)  It was fun however, and once we get moved
to NV and I'm back on the air, I will do a retro-contest again.  And,
now, I'll put the K3 on 3533 in preparation for the NorCal NTS net at
1900 local.

> 73,
>
> Lyle KK7P (who is enjoying our independence and not forgetting the price
> paid for it)

As am I.  Our last WW2 neighbor across the road died a month ago.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org


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[Elecraft mailing list]

Re  Audio mixers that do exactly this are ubiquitous in aircraft. 
Aircraft intercoms came to mind for me as well.  They are designed for carbon mics,  and medium impedance headphones.  I have matched them to more modern mics and phones in the past, so I know it is possible.  There was a lot of information on them, spread out over several years, in Kit Planes Magazine, in the Aero 'Lectrics column written by fellow ham Jim Weir (can't remember his call).  
Jim's company, RST Engineering, used to sell an intercom as a kit.  That would be a good solution.   Try a Web search to see if they are still around.

Mark KE6BB 


-------- Original message --------
From: "Dauer, Edward" <[hidden email]>
Date: 07/04/2015  4:01 PM  (GMT-08:00)
To: [hidden email]
Subject: [Elecraft] Audio Mixers

Audio mixers that do exactly this are ubiquitous in aircraft.  Many are
now integrated into the Nav-Comms, others were integrated into audio
panels along with the Marker Beacon receivers; but in the stripped-down GA
trainers of 20 plus years ago we used to use portable units, measuring
about 4 inches by 2 inches by 2 inches,  powered by a 9 volt battery, and
held onto the panel with adhesive-backed Velcro (the GA pilot's best
friend.)  They came in two-place, four place and six place.  I’ll bet they
are abundant on E-bay-type used equipment sites, since new avionics has
the functions all built-in. 

Simple switches allowed communication just between pilots (so ATC couldn’t
hear the CFI scaring the student), or between one pilot and ATC (so the
student couldn’t hear the CFI asking ATC to scare the student), or both. 
The four-place and six-place allowed passengers to listen and talk with
the pilots but not communicate with ATC (so the pilots could scare just
them.)  I don’t know if they would be compatible with modern amateur
transceivers — but they used to be as common as dirt and cost about as
much.  Anyone looked into it?


Ted, KN1CBR (and ex-CFI)

>Message: 27
>Date: Fri, 3 Jul 2015 13:15:44 -0500
>From: David McAnally <[hidden email]>
>To: K3 List <[hidden email]>
>Subject: Re: [Elecraft] Audio mixers
>Message-ID:
> <[hidden email]>
>Content-Type: text/plain; charset=UTF-8
>
>This was something we wondered about during field day. A way for operator
>and logger to speak to each other over the headsets, as well as listen to
>the QSOs.  Hearing both sides of the QSO was accomplished by using the
>monitor feature on the K3.  However, the operator and logger wanted to
>communicate with each other sometimes as well.
>
>I added an external mixer
><http://www.amazon.com/dp/B000KIPT30/ref=pe_385040_30332190_TE_M3T1_ST1_dp
>_1>
>to allow TX monitor and RX audio to be sent to a video stream as well as
>the headset for the logger. Combining mic audio from two headsets might be
>a little more complicated, especially to be active during RX as well as
>TX.
>
>David M.
>WD5M
>
>On Fri, Jul 3, 2015 at 12:43 PM, Cady, Fred <[hidden email]> wrote:
>
>> Hi all,
>> Happy 4th.
>> I'd like to use an audio mixer to mix computer and mic audio plus have
>> kind of an intercom between two operators wearing headphones.  I know
>>there
>> are audio experts here so what suggestions might you have?
>> Thanks and 73,
>> Fred KE7X
>> ______________________________________________________________
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>

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