"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.

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

That *is* the icom DSP that is in the 706..
Some other icoms too...
That was an option on the 706mk2, and standard
on the 706mk2g. MK

schrieb:


That *is* the icom DSP that is in the 706..
Some other icoms too...
That was an option on the 706mk2, and standard
on the 706mk2g. MK


I know. But AFAIK the UT-106 was released for the PCR-1000 first.