Had a Member of the Group send Me a Link direct , I thought I would share it
then We can get back to repeater Building before  We get hollered at  lol

 

http://www.hq.nasa.gov/alsj/quindar.html




 

Don 

 

KA9QJG 

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff Lavoie -
KB1SPH/WQEX694
Sent: Tuesday, July 13, 2010 10:23 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: question for commercial radio shops

 

  

That makes sense. I wonder if the ground crew could trick the ground 
receiver into un-muting the audio from the shuttle so that they can listen 
in on what's going on.

Jeff, KB1SPH / WQEX694

--------------------------------------------------
From: "Martin Flynn" <mafl...@theflynn.org <mailto:maflynn%40theflynn.org> >
Sent: Tuesday, July 13, 2010 11:16 PM
To: <Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> >
Subject: Re: [Repeater-Builder] Re: question for commercial radio shops

> Spacecraft systems are full-duplex. The purpose of the "Quindar tones"
> was to mute the uplink audio when Houston had nothing to say.
>
> ka9qjg wrote:
>>
>>
>> Meant a lot to the First Astronauts with Communications that is how
>> it got started I think , I forget if it was a Pre or after Transmission
>>
>> Don
>>
>> KA9QJ



_

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