[TenTec] rx-340 NB

Lawrence Kozal redmold@earthlink.net
Mon, 7 Jan 2002 12:33:00 -0500


Fellas,

Although an OmniC user, I now have the 6N2 rig - the NB is Great!  Rig has
IF DSP and the variable bandwidth feature works fantastic - getting more
interested in your RX 340 comments all the time!

Larry Kozal  K8PUJ

----- Original Message -----
From: "Paul Christensen" <paulc@mediaone.net>
To: <tentec@contesting.com>; "Bill Steffey" <ny9h@arrl.net>
Sent: Sunday, January 06, 2002 11:10 AM
Subject: Re: [TenTec] rx-340 TX/RX combos


>
> > I'd prefer to be incorrect, however ...It is my understanding from
TenTec
> > that the receiver in the Omni6+ is a superior receiver on ham
> > bands(obviously) compared to the Rx 340. I had asked someone down there
> > about the performance comparision. What experiences have list members
had
> > with the Omni 6+ prior to acquiring the 340??
>
> I own both.  You can see my RX-340 and Omni Six Plus at:
>
> http://www.qrz.com/database?callsign=w9ac
>
> The RX-340 is superior to the Omni Six on the ham bands...period.  The
> RX-340 is seemingly impossible to overload, the zero-overshoot DSP filter
> skirts are surgically precise, and 50+ DSP filter bandwidths can be
> selected.  Under no conditions during the past six months has the Omni
> outperformed the RX-340 under and operating condition.  Carl, N4PY has
more
> direct experience in contesting conditions, but in weak-signal DX work,
the
> RX-340 is unbeatable.
>
> There is one caveat to the superiority of the RX-340; it does NOT have DSP
> noise reduction (yet.)  I suspect it will be added in a future firmware
> release.  I have already asked Ten-Tec to include the same great NR
> algorithm as designed into the Omni Six Plus.  I have never heard a better
> noise reduction algorithm anywhere else.
>
> The RX-340 audio system is dare I say...near audiophile quality.  I run a
> Fast Fourier Transform software program called SpectraPlus and the audio
> passband is flat within +/- 1 dB from D.C. out to the edge of the filter
> skirt.  I believe Bob Sherwood (of Sherwood mod fame) measured the RX-340
> with a Total Harmonic Distortion (THD) figure of less than 0.2% in SSB and
> synchronous AM.  The RX-340 *sounds* like a Hi-Fi receiver rather than a
> communications-grade receiver.  For pro audio applications, the RX-340
> offers a true balanced, transformer-isolated 600-ohm output at 0 dBm, and
> also offers directly-coupled and AC-coupled audio output connections.  I
run
> the DC-coupled output to my PC sound card and the AC-coupled output to my
> Marantz Stereo Console amplifier.
>
> Precision off-air oscilloscope monitoring is a snap on the RX-340.  Thre
are
> three separate IF outputs on BNC connectors that appear on the rear panel.
> I run one of these into channel one of my dual-trace-scope and the off-air
> transmit sample into channel 2.  By alternating between the two traces, I
> can be in a QSK QSO and see the simultaneous CW waveforms of the other
> station and my own.
>
> -Paul, W9AC
>
>
>
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