Note: I am not the author of the lcd, bounce or si5351 libraries. The lcd and si5351 were both for circuit python which is a little different and bounce I adapted from an Arduino library. Simple Encoder is also adapted from some arduino code I found and "micropython-ized"
The main starting point of the code can be run by import radiorun
The code itself is pretty simple - happy to answer any questions on how it works!
In this video I wrap up the build, get it on the air and even make a QSO!
Here's where I bought the genuine RD15HVF1s from
https://www.rfparts.com/rd15hvf1-501.html
RD15HVF1 datasheet
https://www.mitsubishielectric.com/semiconductors/content/product/highfrequency/siliconrf/discrete/rd15hvf1.pdf
0:00 Intro
1:08 A note on RD15HVF1s genuine and otherwise
3:59 Pinout of genuine RD15HVF1 and copy
4:57 T1 Wound and Installed
5:45 T1 tested on the board
7:32 T5 Wound and installed
10:03 T5 tested on the board
10:40 Power supply filtering
12:06 Testing without the Low Pass Filter
14:13 Checking the bias on the mosfets
14:54 Two tone test
16:08 Low pass filters
17:07 Testing with Low pass filters installed
18:47 Getting the magnis on the Air
19:15 Some listening
20:41 A QSO (hope you don't mind me sharing our QSO, John)
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https://www.youtube.com/watch?v=fTTn1EdjNQY
In this video I install the input attenuator, switch and splitter (transformer T1). I then test the function of the input switch and finally hook up QCX Output to RF In on the amplifer and observer the waveforms after transformer T1.
The Pi Attenuator calculator I mentioned is here
https://www.pasternack.com/t-calculator-pi-attn.aspx
...
https://www.youtube.com/watch?v=8W1K4Lo47Fo
This is a quick update from the original 10W Amp video:
https://www.youtube.com/watch?v=wBiz594O5LA
In this video I do a number of measurements varying both the input signal as well as supply voltage and graph the results with Python.
I also add a low pass filter design from this site and remeasure
https://rf-tools.com/lc-filter/
Finally I graph the result of increasing the DC bias to the BS170s
...
https://www.youtube.com/watch?v=JMlc5uohcm0