Radio Works CW80 Balun
 

I have used Radio Works Carolina Windom, CW80 couple of years. After
transmitting RTTY couple of minutes around 7-800 watts, antenna went dead..
Infinite SWR on all bands.. I think Balun was dead.. I want to replace more
bigger balun for high power, which manufacture's balun is good for CW80?? Is
it a 4:1 or 6:1?? I would like to homebrew if there is a step by step
guideline..
Thanks for your help..