ESP32 Based SDR Transmitter - Part 3 BPF, Preamp and fixing some Amp problems

This is the third video in the SDR transmitter series and in this video I move on to the bandpass filter after the Tayloe Encoder as well as building up a little preamp to raise the signal up to that required by the Amplifier. I don't get to installing the amplifier and LPF in this video but I do some troubleshooting with a broken QRP Labs 10W amplifier Part 1 - https://www.youtube.com/watch?v=XdupkNW19kA Part 2 - https://www.youtube.com/watch?v=yNxErsmimLY Preamp board https://github.com/thaaraak/tayloe-preamp BPF board https://github.com/thaaraak/double-tuned-bpf QRP-Labs 10W Amplifier https://qrp-labs.com/linear.html 0:00 Intro 01:04 Bandpass Filter Schematic 02:07 BPF Board populated 03:23 BPF on the Spectrum Analyzer 04:06 BPF installed after the Tayloe Encoder on the oscilloscope with single tone 04:55 Comparison to signal without BPF 05:37 Comparison with two tone test 06:20 A view on the spectrum analyzer 08:27 The amplifier I will be using 09:21 Oh oh - I broke the amplifier! Some troubleshooting 11:05 IRF510s pulled from board 11:37 More blown components found 12:52 Amplifier back working again and testing the output on the scope 14:44 A quick look at the input impedance of the Amplifier using the minivna 15:50 Preamp schematic 16:36 Preamp board 17:09 Preamp board populated and testing out of circuit 18:24 Preamp installed after BPF and tested 21:39 Wrapup and next steps