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Old 02-24-2022, 09:59 PM
bhegges bhegges is offline
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Join Date: Oct 2008
Location: Sioux Falls, SD
Posts: 140
old_tv_nut and Electronic M, thank you for the replies. The set is a power tx set so no need for isolation and it sounds like I will need an inverted signal.

I found an old post from you with a circuit design. I understand I can adjust the collector resistor to change the output, also can I skip the .22uf on the collector as I am feeding directly into Q4? Additionally read that a clean 12v is important. I have 19v on the board to work with so I could add a voltage regulator to drop down to 12v. Some quick searching suggests this transistor should work: https://www.digikey.com/en/products/...4401TA/3478153

As for details on the waveform I tried to clean up and shrink the schematic to better fit. See below from Sams which includes the waveform, also posted is the inverter/amp circuit.



Last edited by bhegges; 02-24-2022 at 10:03 PM.
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