Build small PA output transformer

Here I build a new final output transformer using a BN-43-202 core for one of my older spare RF power amplifiers. I needed to do this because I have only one unused BN-43-7051 core left in my parts box, but I need two, so freeing up this core will give me the two I need to use in an RF power combiner. This combiner will be used in a future 100 watt amp that I plan to build shortly.