I have run RTTY on the Orion II both ways without an interface other than a
small Behringer mixer board to control levels for AFSK and a simple
one-transistor interface built into a parallel port connector for true FSK.
The true FSK works best because the ALC doesn't have to 'hunt' around to
find the right power level, and it probably makes a cleaner signal since
some small amount hum and noise is always present on an analog audio chain.
Both methods to get the heat sync warm when used in RTTY contests,
especially if running the full 100 Watts as in the NAQP contest. A small 12
VDC computer fan keeps the temperature down.
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Roger Hughes" <roger.h@comcast.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, January 29, 2009 10:45 PM
Subject: Re: [TenTec] Orion II....AUX I/O Direct to Computer for Digi?
> It seems straight forward. Also can run fsk from the i/o. I have a friend
> who does not use an interface. He uses the software whatever in and out of
> the radio to cumputer. He uses abt 50 watts no overdrive watching the ALC
> of
> course. He said TT told him that was the way to work PSK AFSK out of i/o.
> I'm putting my Orion back together from reinstalling ATU. I made a metal
> fan
> stand and hooking up my own cumputer fan. I believe you would have to have
> a
> fan to run FSK RTTY. Could get hot.I recently retired for the 2nd time. I
> got a bunch of equipment to put on repair table.Back to other. I bet the
> interface would be rite handy on rfi, gnd loops and whatnot. Some of the
> newer rigs are an accident waiting to happened. I have a R390a reciever I
> need to align.Thats my RTTY rx coming in to the Orion. Maybe can help.
> Thanks Roger w4iv
> ----- Original Message -----
> From: "John" <fraz1@bellsouth.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Thursday, January 29, 2009 5:30 PM
> Subject: [TenTec] Orion II....AUX I/O Direct to Computer for Digi?
>
>
>> Hi Folks....
>>
>> Anyone going straight from AUX I/O to computer for working PSK? If so,
>> please email me off-line.
>>
>> 73 John K4NP
>> _______________________________________________
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>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>
>
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