[600MRG] Kenwood TS-990S first impressions

[Carl]

The earlier TS-950SD and SDX had a mod to transmit thru the 12 kHz LC filter 
as well as mods to open up the audio. Another mod used the 6 kHz optional AM 
filter and internal switches would open the audio to 3100 Hz per SB...I use 
this one with a D-104 and impedance matching to the rig and get very 
favorable reports. Using the stock MC 80 mike is restrictive but clear and 
clean.

Carl



----- Original Message ----- 
From: <sbjohnston at aol.com>
To: <600mrg at w7ekb.com>
Sent: Monday, March 17, 2014 9:34 AM
Subject: Re: [600MRG] Kenwood TS-990S first impressions


>
> One further observation on the TS-990S that I forgot to mention:
>
> In AM mode the widest IF filtering settings should pass enough signal to 
> demodulate more than 5 kHz of audio, especially if tuned to one side of 
> the signal, but the audio scope (which can show up to 8 kHz) never seems 
> to show any energy much beyond 5 kHz (nor am I hearing it).  The maximum 
> settings of the audio filter bandwidth at 5 kHz seems to be the limiting 
> factor.  I am hopeful that there is a configuration somewhere to "let it 
> out" more for hi-fi AM reception, or perhaps a firmware change down the 
> road will allow it.
>
>
>
> Steve WD8DAS
>
> sbjohnston at aol.com
> http://www.wd8das.net/
> --------------------------------------------------------------------
> Radio is your best entertainment value.
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