[TenTec] Help with Digital Modes on Orion II

[David W LeJeune, Sr]

Hi, Greg
    Its exactly the isolation problem, as well as the desire to use FSK 
instead of AFSK for RTTY, and to use CW from a keyboard, that I spent the 
$$$ to get the interface I use (Rigblaster Pro).  I homebrewed my first 
interface for PSK in 1998, and have used several others (homebrewed and 
commercial) since.  But total isolation, including completely isolating the 
computer from the ORION ( using opto-isolators for keying and ptt) is, I 
believe, worth it.  I've had some terrible problems with RF feedback and 
audio ground loops. My current setup is totally free of those problems now.

    I also don't like to use VOX for keying with PSK.  I prefer to use PTT 
keyed from the RS232 port (using opto-isolators).

Dave K5WNV

----- Original Message ----- 
From: "Gregory J. Knapp" <gknapp at freshrain.org>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Thursday, August 17, 2006 8:49 AM
Subject: Re: [TenTec] Help with Digital Modes on Orion II


Ray/others,

Please excuse my ignorance, but:
 - 1.  If I use the supplied audio cable to directly connect the Orion II to
the computer, is there any danger to the Orion in doing so (as in wrong
voltages blowing up the Orion)?
 - 2.  How do I key the transmit on the Orion?  Do I use the vox? Does that
work on the line input? Or connect something else between the computer and
the rig? Where to where? Or do I do it all manually, flipping some switch
every time I want to transmit? (I do have the serial cable hooked up between
the Orion I and the computer because I use the N4PY control SW about half
the time.
 - 3. If I can operate directly as you are doing, why do people feel obliged
to hook up the $50 to $300 interface boxes?

Greg, N6GK


Snip:  You don't need a TNC or interface box to do RTTY.  The supplied audio
cable,
and a computer running MMTTY or similar software, will work just fine.

73,

Ray W2RS
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