[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: ClearSpeech Stuff



I just dug out my Timewave 59+ DSP unit. All this discussion got me to try
it again...it had a problem locking up at power on and I got so fed up with
it I put it away. I remembered how well it worked on AO-13. I found a power
cube that got it to power on once without locking up...so if I don't lose
power between now and next pass, I'll try it out. Just playing around with
sigs in the noise on HF, it dramatically improved copy, as I remembered it
did for AO-13. ChromaSound didn't do hardly anything valuable as far as
signal threshold improvement. I remember my measurements from years ago on
AO-13 produced about 13 dB in noise reduction on average....I can't recall
the threshold measurements. Maybe if I can keep this 59+ from locking up
long enough, I can make some measurements.

Jon, thanks for the discussion, it prompted me to drag out the ol' dsp unit,
which I really liked but was tired of facing the power on problem. 73

...hasan, N0AN

----- Original Message -----
From: "Jon Ogden" <na9d-2@speakeasy.net>
To: "Mike Murphree" <mike@tropo.org>
Cc: <amsat-bb@AMSAT.Org>
Sent: Monday, February 24, 2003 6:30 AM
Subject: Re: [amsat-bb] ClearSpeech Stuff


> on 2/23/03 6:30 PM, Mike Murphree at mike@tropo.org wrote:
>
> > I still have a DSP-599zx
> > though,
> > since its random noise reduction mode works a lot better than the NR1
> > mode on
> > the TS-2000 which needs a fairly good SNR to work with.
>
> I haven't found my DSP-599zx's random noise reducer to be all that great.
I
> know they upgraded the firmware a couple years ago.  I've never had that.
I
> still have the original firmware that has the audio voltmeter and two tone
> test generator, etc.  I think some of that stuff had to be removed for the
> new functions in the firmware upgrade.
>
> Maybe they changed the NR algorithm.....I've had one or two people tell me
> their 599 changes the noise about as much as my ClearSpeech.  Gee, if all
I
> needed was a firmware upgrade, it would have been cheaper!  Oh well.....
:-)
>
> 73,
>
> Jon
> NA9D
>
> -------------------------------------
> Jon Ogden
> NA9D (ex: KE9NA)
>
> Citizen of the People's Democratic Republik of Illinois
>
> Life Member: ARRL, NRA
> Member:  AMSAT, DXCC
>
> http://www.qsl.net/na9d   <- Updated on 1/22/03!!!
>
> "A life lived in fear is a life half lived."
>
>
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org


----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home