From K1RJZ at thezachs.com  Mon Feb  6 00:06:48 2006
From: K1RJZ at thezachs.com (Rick Zach K1RJZ)
Date: Mon Feb  6 00:06:10 2006
Subject: [NHRC-user] Wimpy, echo'y ID audio, no bass
Message-ID: <5.1.1.5.2.20060206000320.00bc2710@mail.metrowestsystems.com>



I have a pre-recorded ID that I am trying to play back form my laptop .WAV 
file.  I acoustically coupled a walkie to my laptop speaker to transfer the 
audio ID.  Wimpy, echo'y audio, no bass, sounds like how it was actually 
played back.

I also originated wired audio from a mobile (mike hi was all I could get my 
hands on), and that was even worse!  Possibly a gross impedance mismatch.

Can I hard wire -10 dBmv unbalanced audio to some point in the NHRC-5 to 
get a genuine, full 300-3K frequency response (ie: aux in, etc) ?

Thanks,


____________________________________________
Rick Zach, K1RJZ
From jeff at nhrc.net  Mon Feb  6 06:40:48 2006
From: jeff at nhrc.net (Jeff Otterson)
Date: Mon Feb  6 06:38:41 2006
Subject: [NHRC-user] Wimpy, echo'y ID audio, no bass
In-Reply-To: <5.1.1.5.2.20060206000320.00bc2710@mail.metrowestsystems.co
 m>
References: <5.1.1.5.2.20060206000320.00bc2710@mail.metrowestsystems.com>
Message-ID: <6.1.2.0.2.20060206063754.02e33950@mail.nhrc.net>

The receiver input to the NHRC-5 is about 10K ohms impedance.

That would be a good place to start.

Otherwise,  you could conceivable wire in to pin 3 of the DAD 
connector.  You need to have a 1/2 Vcc DC bias here, though.  Might be more 
trouble than it's worth.

Jeff



At 12:06 AM 2/6/2006, you wrote:


>I have a pre-recorded ID that I am trying to play back form my laptop .WAV 
>file.  I acoustically coupled a walkie to my laptop speaker to transfer 
>the audio ID.  Wimpy, echo'y audio, no bass, sounds like how it was 
>actually played back.
>
>I also originated wired audio from a mobile (mike hi was all I could get 
>my hands on), and that was even worse!  Possibly a gross impedance mismatch.
>
>Can I hard wire -10 dBmv unbalanced audio to some point in the NHRC-5 to 
>get a genuine, full 300-3K frequency response (ie: aux in, etc) ?
>
>Thanks,
>
>
>____________________________________________
>Rick Zach, K1RJZ
>_______________________________________________
>NHRC-user mailing list
>NHRC-user@nhrc.net
>http://five.pairlist.net/mailman/listinfo/nhrc-user