On Wed, Nov 20, 2024 at 09:54 PM, Tom Schmidt wrote:
I'll operate, say, PSK31 on my Yaesu FT-920 at the lower end of the passband at a set audio level. Then, when I change to the higher end of the passband, my audio level will be too high, forcing me to lower it so as not to splatter.
Hey Tom,
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For many years I was using the "headphones-to-microphone" method to get audio from my PC into my rig. It was noisy, but it worked. But I did notice the same behavior that you are seeing -- if I adjust the audio output levels for 1500 Hz on the waterfall, but then transmit at the lower or higher ends of the waterfall, then levels would be too low or too high.
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The easiest way around this is to use the QSY button in Fldigi, which will adjust your VFO to keep your transmit audio signal at 1500 Hz (or whatever you have defined as the Sweet Spot in the Fldigi config). I even defined a macro in Fldigi that does the QSY and then LOCKs the transmit audio frequency, like this:
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<QSYTO><LOCK:on>
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I've recently switched to using a cheap audio isolation transformer that I picked up from ebay, which allows me to route the audio out from the PC directly into the microphone jack of the rig, and I no longer have the variation of audio levels when I select a different waterfall frequency in Fldigi. Or at least not that I can notice. :)
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Cheers,
Steve K4RVA
Steve K4RVA