Hi Norm, don't think the propane would get hot enough for a proper thick bronze brazing rod.

I have seen it done with a coat hanger in the past but I can't see it lasting for long in this application.

It was a while ago but I was told something with a higher silver content and thin as possible from memory.

https://www.bunnings.com.au/bossweld-1-6mm-45-silver-brazing-rod-2-pack_p0252919

I distinctly remember welding with something like this, thin like wire and I started off with an oxidising flame on the oxy and was just blowing it away. Even a neutral was cooking it.
I have no idea what I was using though - it was left over rods in a big pack

But again, I think try for lowest silver level you can reliably melt with the propane

Max, you got it haha