I use the AmCom DSP "base" unit with my Omni VI/3, which also provides the
power for it. This little DSP unit does a fantastic job of reducing the
very annoying background hiss to practically zero. I have it driving either
an MFJ "Clear Speech" speaker or a Radio Shack "Minimus 0.5" speaker. BTW -
the Minimus 0.5 speaker beats the socks off of any other commercially made
speaker I have ever tried for communications work. The one that I have is
about 28 years old and unfortunately Radio Shack hasn't carried them for the
past couple of decades.
Reid, K7YX
-----Original Message-----
From: N4ZN - [mailto:n4zn@email.ro]
Sent: Wednesday, February 13, 2002 6:14 AM
To: tentec@contesting.com
Subject: Re: TenTec digest, Vol 1 #241 - 10 msgsRe: [TenTec] RX-340 and
Noise Reduction
I have been using the AmCom DSP speaker for quite some time now. I find it
is a
easy "transparent" solution to all kinds of noise problems, quite similar to
the old "NR button" fix.
It's not specifically adjustable to any any particular type of noise, but
has
a fantastic "blanket effect" on all types noise. The bit rate is slow enough
where it doesn't have any adverse effects on a cw signal, but it blasts away
a "tuner upper" or a BC station in fine form. Random white noise, static,
birdies, hash... all gone. In fact, I've used it mobile, and been able to
copy
stations thru a S-9 power line noise level... judging the desired signal to
be
an S-3,or so.
Best thing is, it costs about $150... as opposed to $400 with the ZX. Worse
thing is, you'll have to add your own power on/ power off switch. It has
a "function on/off", but the unit is allways drawing current regardless. The
radio shack large red pushbutton fit nicely under the Function on/off with
plenty of room insde the case for work. And I had to add a fuse. Seems funny
that these two items were left off the production run, but then again, so
does
the fan on a Ten*Tec.
This unit comes either in it's own speaker cabinet (with a pretty decent
sounding speaker), or as a "base" unit with out a speaker, but smaller. I
opted
for the speaker, as I was planning on running it mobile, and needed a
speaker
anyway. Note, with the base unit you'll have to add a headphone jack in
addition to the main power switch and the fuse, as it only has one audio out
for running to a speaker. The mobile unit has a 1/8" out for headphones.
Just another option for your consideration... hope it served as useful info.
73, Mike/N4ZN
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