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Re: Satellite Demo Audio Box



Can be kinda hard on the audio output section of the rig too.  You are
lowering the impedance of the headphone(s)/speaker(s) combination the more
you plug in if you just have them all in parallel.

73 - JC,k0hps@amsat.org

----- Original Message -----
From: Jamie Hutches <kd5gob@ipa.net>
To: <amsat-bb@AMSAT.Org>
Sent: Friday, June 30, 2000 11:44 AM
Subject: RE: [amsat-bb] Satellite Demo Audio Box


> Yes that is a great idea, but doesn't that cut down the audio sound level
for each added connection?
> I use a stereo headphone splitter on trips so my friend can listen to my
CD player. With another headphones plugged in you volume is decreased.. If
you had 4 things all plugged into one wouldn't the level be too low?
>
> Jamie, KD5GOB
>
> -----Original Message-----
> From: Rick Allnutt [SMTP:ws8g@hotmail.com]
> Sent: Friday, June 30, 2000 12:34 PM
> To: amsat-bb@AMSAT.Org
> Subject: [amsat-bb] Satellite Demo Audio Box
>
> Gentlepersons,
>
> Many of you have given demonstrations of satellite communications at field
> day, and outside in general, away from your shack.  My first attempt to do
> this failed when I used a speaker for the audio instead of headphones
> because of feedback through the bird.  If I got the speaker far enough
away
> from the microphone to not have feedback, I couldn't hear very well at
all.
>
> For field day, I bought about $2 worth of components: 4 mini female mono
> plugs, a mini mono to mini mono cord, and a small project box).
>
> I simply wired the monoplugs in parallel inside the box.
>
> Now I can use the cord to plug into the mini-mono speaker jack on my
FT-847
> (or my Icom handheld) and to one of the plugs on the box.  I can use one
of
> jacks for a mono headset, and another for a computer speaker.  I can
listen
> with the headphones, and put the speaker far enough away to avoid feedback
> while allowing others to hear the pass.   The last jack can be used to
> record the pass with a tape recorder.
>
> Same idea could be used with stereo plugs using the stereo headphone jack
of
> the FT-847, a set of stereo computer speakers, stereo headphones, and a
> mini-disk recorder.
>
> 73s de WS8G (Rick)
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