[CQ-Contest] Need advice

Pete Smith N4ZR n4zr at contesting.com
Sun Sep 2 10:28:57 EDT 2012

Not just for RTTY - I think it makes good sense on CW to set the beat 
notes of the two radios to different frequencies.

73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000

On 9/2/2012 10:09 AM, Richard Ferch wrote:
> Dick,
> I agree with what Kirk wrote, with one addition.
> Someone else has posted a suggestion about using different tones on the
> two radios. The two channels in the stereo sound card don't care whether
> you use the same or different tones. As far as the software is concerned,
> you can use the same tones in both.
> If you like to listen to RTTY signals either to help with fine tuning or
> simply so you are aware of which radio the received signals are coming
> from without having to look, then you can wire up a cable assembly for
> stereo headphones with the input to the left ear from one radio and the
> input to the right ear from the other radio. This lets you use the same
> tones in both radios and distinguish between them by left vs. right. If
> you are using mono headphones, then using different tones in the two
> radios might help distinguish between them. Either of these is in lieu of
> the more elaborate audio switching an SO2R box can do. If you don't like
> to listen to RTTY, you don't need either of these.
> 73,
> Rich VE3KI
> Kirk K4RO wrote:
> If it's just RTTY SO2R that you are interested in, then you probably don't
> need a DX Doubler. Depending on the software you use, you can probably
> accomplish what you want with just a couple of serial ports and a simple
> interface on each port. AA5AU's RTTY contesting site and the N1MM user
> manual should give you a lot of ideas. A serial port can handle PTT and
> FSK keying (one port for each radio.) All you need for receive is a stereo
> sound card with a line input, and the appropriate cabling to your radios.
> You may need a simple resistor pad if your radios don't have a line level
> output and you have to use the headphone output instead.
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