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[TenTec] DSP reports--suggestion/request

To: <tentec@contesting.com>
Subject: [TenTec] DSP reports--suggestion/request
From: wg6h@postoffice.pacbell.net (Bill Miner)
Date: Wed Apr 30 00:44:09 2003


The ORION has a transverter (DIN) connector and you access the
transverter function via Menus.  No cables to change or patches to move
when going from HF (DC?) to transverter. Transverter Tx output is fixed
at +5 dBm so no attenuator is necessary.

You can select upper or lower sideband CW on ANY band as you see fit.
The DSP functions work like magic with little or no  audio distortion.

If you get the chance to "road test" an ORION I think you would be

Bill - K6WLM

"Dr. Gerald N. Johnson, electrical engineer" wrote:
> There WILL be distortion of the voice when the signal reaches the DSP
> with noise a little stronger than the signal. The DSP can't recreate
> voice components that were under the noise at the D/A converter. The
> background noise sound after processing is different, than ordinary
> noise, and probably different for each implementation of the available
> noise reduction algorithms.
> My Corsair is second only to my antique BC-453 plus converter for
> copying during lightning crashes. The 453's IF uses several transformers
> at 85 KHz to create an even more rounded pass band than the Tentec
> ladder filters.
> An Orion is not in my sights at this time, its lacking in frequency
> coverage (nothing above DC), and my Corsair II would do well if turned
> on. Since my dad moved to an assisted living facility last November,
> I've made few HF contacts. I suppose I need to go put him up an antenna
> there. Then run fast before the TVI complaints from my dad's 35 close
> neighbors catch up with me!
> I did look at Omni V and VI before I bought the Corsair II. I found they
> had an annoying setup running CW on LSB on 28 MHz. My use then was
> planning to be as an IF for VHF and where contacts switch freely from CW
> to SSB, not being able to copy SSB while in the CW mode would be
> terminal. I'm annoyed at my Yaesu multimodes that switch the receive
> frequency (but not the display) when changing modes but at least they
> stay on the same sideband. A mixed mode USB/CW contact with the Omni V
> and VI would be very difficult. I suppose one could build the VHF/UHF
> transverter with the LO on the high side, and run LSB for SSB, but then
> it all tunes backwards. The Corsair II doesn't suffer from that fault.
> But I've gone off on a different route for super VHF performance, and I
> still need to complete the first stage of that, winding the IF
> transformers with copper hair is only half done. Then I get to design
> and build my own crystal filters.
> 73, Jerry, K0CQ
> --
> Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
> Reproduction by permission only.
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