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I have indeed done this simply by disassembling the wireless microphone and wiring in an auxiliary input jack in place of the mic element along with an attenuator so the AUX IN signal from the computer's earphone jack will not overload the transmitter inside the mic- as suggested above by R Pau. It is also possible to signal-trace the (tiny) PC board inside ...


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If you have an extra microphone, it may be as simple as placing it near the computer's speaker and adjusting the volume levels. This requires the mic and computer to be in a quiet area where it wont pick up outside noise. If the computer is in a noisy area, you could tap into the microphone circuit at the input and run a headphone cord direct between the two....


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An educational SDR kit, such as the ADI ADALM-Pluto or a Lime SDR Mini, can be used as a UHF exciter, with any modulation that your receiver requires generated by software synthesis (GNU radio , et. al.). I might use a Raspberry Pi to run the SDR modulator/synthesizer code. If legal within your jurisdiction, you may need to use a suitable filter before any ...


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My Icom T81 handheld has a detailed circuit diagram and description in the service manual which can be found online (well done Icom!). It shows how the handheld will fold back power when the SWR is high: The APC circuit protects the power amplifier from a mismatched output load and stabilizes the output power. The APC circuit is designed to use VHF, UHF and ...


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Two parts to this answer: First, most testing would be done against dummy loads, looking at the results on spectrum analyzers. Such tests should not propagate. Secondly, there's a fine line here. As worded, Part 97 prohibits: (2) Communications for hire or for material compensation, direct or indirect, paid or promised, except as otherwise provided in ...


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