70 Watt Amplifier Kit Build

This video is a followup from the ESP32 based exciter I built earlier
   • ESP32 CW Transmitter  

In this video I build up an IRF530 based amplifier kit from ebay (I am not affiliated in any way with this)
https://www.ebay.com/itm/324226076515...

I found some very helpful documentation from these sites
https://f5npv.wordpress.com/irf530-mo...
https://dk9jc.de/blog/equipment/142-d...
https://pa-11019.blogspot.com/2016/11...

I drew the circuit out in Kicad and put it up on my github repo
https://github.com/thaaraak/70W-Ampli...

The LPF was design with this tool
https://rf-tools.com/lc-filter/

and the final LPF is here
https://drive.google.com/file/d/1peP7...

0:00 Intro and Component Walkthrough
1:52 Schematic Walkthrough
4:08 Board Walkthrough
5:48 Endcaps removed from board
6:19 Output transformer first end cap
6:59 Ferrite tubes and bushings in place
8:26 Testing continuity
9:00 T/R Relay installed
10:30 Relay and Bias tested
13:59 Input transformer installed
14:39 Electrolytics installed
14:57 IRF530s installed
15:40 Output/Input transformers wound
18:15 feedback resistors installed
18:54 RFC installed
19:24 Excited connections to the Amplifier and test setup
21:55 Final testing on the oscilloscope