[TenTec] AM Receiver distortion in Orion II

[Larry Menzel]

Number 1, I think it depends in large measure on the quality of the 
playback.  I listened first on my stereo speakers on my computer and I 
varied the bass as I listened.  I had to lower the bass response on the 
Orion bit, and increase it on the Kenwood part to make either sound like 
"normal" AM audio.  I agree with Carl,  it would seem that the Kenwood bit 
is too good for a 3KHz passband.

Number 2, There is clearly a difference between the two recordings, so maybe 
someone in Tennessee has a tin ear?   Hey...poking a little fun 
here....nothing serious.

I think both recordings when played back on a good sound reproduction system 
sound excellent.  The "muddy" factor, I suppose is simply the bass response 
on a particular play back system.

Larry, N0XB



----- Original Message ----- 
From: "Dennis Jones" <k6rcl at cox.net>
To: "Ron Castro" <ronc at sonic.net>; "Discussion of Ten-Tec Equipment" 
<tentec at contesting.com>
Cc: "Dennis Jones" <k6rcl at cox.net>
Sent: Tuesday, January 23, 2007 7:05 PM
Subject: Re: [TenTec] AM Receiver distortion in Orion II


> Ron,
>
> Sounds good to me, in fact quite good.
>
> DJ  K6RCL
>
>
> On Jan 23, 2007, at 2:54 PM, Ron Castro wrote:
>
>> One of the items on my "wish list" for the Orion II is to fix the
>> AM receive audio, which sounds to me like a problem in the DSP code
>> that causes distortion and 'muddy' sound.  It's most noticeable
>> during selective fades that cause a serious clipping effect.  Last
>> night, I made an MP3 of a local AM radio station comparing the O2
>> to a TS-870, and sent it to TT service.  This morning, TT said they
>> couldn't hear any difference between the two receivers.  Is it my
>> ears or what?  The link to the clip is below.  The O2 is the first
>> 60 seconds and the 870 is the second 60 seconds.  Bandwidth on the
>> O2 is 6 kHz, while the 870 is 3 kHz, although as you'll hear, it
>> sounds just the opposite!
>>
>> http://n6ie.com/OrionII_vs_870.mp3
>>
>> Can anyone besides me hear the difference?
>>
>>       Ron N6IE
>>  www.N6IE.com
>> (Formerly N6AHA)
>> _______________________________________________
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>
> Dennis Jones
> k6rcl at cox.net
>
>
>
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