Lucky wrote:
Hi guys

I want to pick up a DSP unit for some of my radios. I picked up a
Lowe 150 and want to get DSP for it.

I've been looking at some used models like the
JPS NIR-10 and JPS NF-60 DSP Notch Filter.

Have any of you used one of these or can make a recommendation?
I will be using it SSB as well as AM.

Thanks
Lucky

Lucky:
I use the Timewave DSP-599zx unit and it works pretty well. I have the
NF-60 but, as advertized, it's a notch filter only.

--
Brian Denley
http://home.comcast.net/~b.denley/index.html

Heck, just download some free software, and run the audio through
your puter, if you want to give it a test drive. Those DSP's seem
to be as good, or even better than the outboard hardware versions.
I use SBFFT, MM-DSP, etc. Chromasound is pretty good for payware.
They have a free demo which runs 15 min a shot. You have to restart
it after 15 min...It's pretty good.
Some do some things better than others.
SBFFT is good for making "brick wall" filters, and can run up to six
filters at once. It's a DOS program though. No problem here, as I still

run win 98...
The others are good for all around filters, and NR.
I have DSP built into my ic-706, and my DSP on the puter is much more
powerful as far as bandpass/stop filters. Chromasound has autonotch.
In fact, I've compared the auto notch in the icom, to chromasound,
and there was no difference I could tell. You need a full duplex
soundcard to run these. Myself, I've got DSP out the kazoo,
and hardly use it...
I think it's overrated... Sure the NB works, but it muffles the audio..
The autonotch works great, *until* you started having SSB voice on top
of the heterodyne, and then the autonotch gets confused, and pulses
on and off between words...I prefer the fixed notch in my 830, or
even the fixed DSP notches in the puter software.....
SBFFT is great for taking razor thin slices out of a bandpass...IE:
a heterodyne on a MW station, etc...
When I'm on 160m, and trying to cut noise to hear super weak sigs,
do I use DSP?
Nope...I use my variable bandwidth filters, IF shift, and manual notch
thats on the TS-830. That combo is better than DSP, more adjustable,
and molests the desired signal less. MK

I have tried LOTS of DSP solutions for HF SSB and nothing works as well as the
Clear Speech speaker with built in DSP. I dont like the user interface (dip
swicthes) but the unit flat out works better than anything I have seen.
Curious, since it was orginally engineered by a small company with nowhere near
the engineering resources of ICOM etc.

"BOEING377" wrote in message
...
I have tried LOTS of DSP solutions for HF SSB and nothing works as well as
the
Clear Speech speaker with built in DSP. I dont like the user interface
(dip
swicthes) but the unit flat out works better than anything I have seen.
Curious, since it was orginally engineered by a small company with nowhere
near
the engineering resources of ICOM etc.

More and more people are talking about this one.

Lucky

Taken over by Heil Products -- see URL:
http://www.heilsound.com/amateur/cle...ch_speaker.htm
--
Caveat Lector (Reader Beware)



"BOEING377" wrote in message
...
I have tried LOTS of DSP solutions for HF SSB and nothing works as well as
the
Clear Speech speaker with built in DSP. I dont like the user interface
(dip
swicthes) but the unit flat out works better than anything I have seen.
Curious, since it was orginally engineered by a small company with nowhere
near
the engineering resources of ICOM etc.

BOEING377 wrote:

I have tried LOTS of DSP solutions for HF SSB and nothing works as well as the
Clear Speech speaker with built in DSP. I dont like the user interface (dip
swicthes) but the unit flat out works better than anything I have seen.
Curious, since it was orginally engineered by a small company with nowhere near
the engineering resources of ICOM etc.

What ClearSpeech will not do is take out heterodynes, at least weak ones,
and get rid of SSB interference that's offset in the direction of the sideband,
a notable condition because a linear brickwall filter takes it away completely.

In particular, it has no manual notch, and no brickwall filter. It's deficient
in adjustable linear filters, in other words.

What it does do is a good job of recognizing various forms of noise
interference on speech, and taking out the noise, sometimes spectacularly,
leaving the speech.

Or, in my case, bird calls from the backyard bird microphone.

So it's the noise reduction, or the non-linear filtering, that the ClearSpeech
has the edge on, much better than any other I've seen so far.

The Timewave 599zx takes out the noise but leaves the speech sounding muffled;
the JSP NIR-12 has a couple of noise reduction methods, one of which sometimes
works on ignition type noise better than the ClearSpeech but not often, but
neither of which I'd normally go to first.

The 599zx has the best adjustable linear filters, but alas only a single manual
notch; and the widest bandwidth (5khz) of the bunch.
--
Ron Hardin


On the internet, nobody knows you're a jerk.

wrote:
Heck, just download some free software, and run the audio through
your puter, if you want to give it a test drive. Those DSP's seem
to be as good, or even better than the outboard hardware versions.
I use SBFFT, MM-DSP, etc. Chromasound is pretty good for payware.
They have a free demo which runs 15 min a shot. You have to restart
it after 15 min...It's pretty good.
Some do some things better than others.
SBFFT is good for making "brick wall" filters, and can run up to six
filters at once. It's a DOS program though. No problem here, as I
still

Good point. I like SR5 even better and it's now free:
http://www.ar5.ndo.co.uk/

--
Brian Denley
http://home.comcast.net/~b.denley/index.html

"Ron Hardin" wrote in message
...
BOEING377 wrote:

I have tried LOTS of DSP solutions for HF SSB and nothing works as well
as the
Clear Speech speaker with built in DSP. I dont like the user interface
(dip
swicthes) but the unit flat out works better than anything I have seen.
Curious, since it was orginally engineered by a small company with
nowhere near
the engineering resources of ICOM etc.

What ClearSpeech will not do is take out heterodynes, at least weak ones,
and get rid of SSB interference that's offset in the direction of the
sideband,
a notable condition because a linear brickwall filter takes it away
completely.

In particular, it has no manual notch, and no brickwall filter. It's
deficient
in adjustable linear filters, in other words.

What it does do is a good job of recognizing various forms of noise
interference on speech, and taking out the noise, sometimes spectacularly,
leaving the speech.

Or, in my case, bird calls from the backyard bird microphone.

So it's the noise reduction, or the non-linear filtering, that the
ClearSpeech
has the edge on, much better than any other I've seen so far.

The Timewave 599zx takes out the noise but leaves the speech sounding
muffled;
the JSP NIR-12 has a couple of noise reduction methods, one of which
sometimes
works on ignition type noise better than the ClearSpeech but not often,
but
neither of which I'd normally go to first.

The 599zx has the best adjustable linear filters, but alas only a single
manual
notch; and the widest bandwidth (5khz) of the bunch.
--
Ron Hardin


On the internet, nobody knows you're a jerk.

Hi Ron

You see I need a notch filter on the HF-150 imo. I was thinking of picking
up just the NIR-60 for now. It's just a notch filter. The 150 doesn't really
need DSP, but it would make it even better. But, I could use a DSP unit with
the rest of rigs except the Icom R-75 which already has superb DSP for the
price.

I don't get many hets in SSB, but in AM I do.
I like AM 610 WIOD outta Miami but even attenuating it doesn't help much.
The R-75 takes it right out either using ECSS or the ANF.

So I guess I pass on the Clearspeech till I hear more reviews from end
users. I was all about to order the Clearspeech too.

Hey Ronnie,

why don't you buy binoculars with a built in camera? I have one. So cool to
catch these winged creatures close up. Look on Ebay.

Lucky

Lucky wrote:
You see I need a notch filter on the HF-150 imo. I was thinking of picking
up just the NIR-60 for now. It's just a notch filter. The 150 doesn't really
need DSP, but it would make it even better. But, I could use a DSP unit with
the rest of rigs except the Icom R-75 which already has superb DSP for the
price.

Be warned that automatic notch filters don't work except on really loud
heterodynes. The weak ones stay there, hour after hour, if you're listening
to some broadcast with a weak het on it.

Manual notch filters take out what you tune them to take out, no matter
how weak.

I never use the automatic notches on any of my DSP's, so useless are they.
--
Ron Hardin


On the internet, nobody knows you're a jerk.

Ron Hardin schrieb:

I never use the automatic notches on any of my DSP's, so useless are they.

I liked the 'UT-106' DSP-option from the Pcr-1000 for its automatic
multi-notch only. This unit also works in the Icom 706 TRX-series.
It filtered very nicely especially very weak hets. But I found it was
useless on reducing QRM or QRN noise.
At least my manual notches on the NRD-525 and the external analog filter
notches of the Datong FL2 and the Dierking DG82NF have deeper skirts.