Brian Hill wrote:
Hi Ron. Sounds like you may have some stray RF in your shack. Also try
running its power independent from that of your radio?

No, in fact the last test was trying to filter audio from an outdoor microphone,
with no RF involved; which is the place that the Am-com version of the thing
really shines, knocking down wind and traffic tire noise, leaving birds or
interesting night sounds perfectly clear.

What it's suffering from is probably a ground loop through its own power source,
as to feedback.

I have _every_ JPS filter (thanks eBay), Timewave 599zx, MFJ 784B, and three
Am-com ClearSpeech filters, and all work fine on the same power supply. This
thing just has some really terrible engineering of some kind. I know that the
algorithm is great thanks to Am-com's version.

The box is dated April 2005, in case someday they get a working version. I won't
be buying another until I see a lot of positive reviews first, however.
--
Ron Hardin


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

Ron Hardin wrote:
I have _every_ JPS filter (thanks eBay), Timewave 599zx, MFJ 784B,
and three
Am-com ClearSpeech filters, and all work fine on the same power
supply. This
thing just has some really terrible engineering of some kind. I know
that the
algorithm is great thanks to Am-com's version.

Ron Hardin


Ron, I've been trying to decide which external DSP to buy to clear up
reception on SWL AM broadcasts and 80 meter ham reception. I'm using a
brand new R8B with a Par EF-SWL antenna. I've considered the 599zx,
784B, SGC ASDP2, and the ClearSpeech options.

The R8B generally performs as well as my main radio, a TS-2000X, but it
doesn't come near the Kenwood in noise reduction.

It seems to me like the 599zx and 784B are eight year old designs.
That's close to antique in computer technology. (Of course, the R8B is
no newbie either.)

I wonder which is the best current choice. More important, I wonder
when the next leap in external DSP will happen.

WT7T
Barry