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Although the Jupiter is available with an antenna tuner, I originally opted for the model without.
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I had to insert a 10:1 attenuator to cut the transmit audio level even further because the Jupiter seems mighty sensitive to audio via the “line input.” (See update here.) Now I use it with Ham Radio Deluxe software for digital modes, mostly PSK-31. It’s actually a computer sound card that connects via a USB port, is made specifically for ham radio digital modes, and provides the interface to the radio. I solved that problem by purchasing the SignaLink USB, shown at the top of the photograph.
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