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Re: [CQ-Contest] RTTY contesting; filters

To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] RTTY contesting; filters
From: Jim Brown <k9yc@audiosystemsgroup.com>
Reply-to: k9yc@arrl.net
Date: Tue, 16 Feb 2021 17:18:02 -0800
List-post: <mailto:cq-contest@contesting.com>
On 2/16/2021 1:27 PM, Ed Muns wrote:
I do like lower tones and typically use 915/1085 which is less fatiguing
over long periods.  OTOH, their TX audio harmonic is still within the normal
2 kHz bandwidth for SSB transmitters when transmitting AFSK.  Not a problem
for those of us using FSK.

And not a problem if audio levels are set properly. There's an app note on my website that describes several good ways to do it, depending on what you have available to check it. Those instructions are on page 3.

http://k9yc.com/USB_Interfaces.pdf

While the document is mainly describing USB audio interfaces, setting levels are the same if you're using the computer's built-in audio interface.

73, Jim K9YC


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