Since last Friday I had three fillet practice sessions using some old frames for tube mtl, first times I attempted fillets.

My first session I used a purox torch I've had forever but not touched for 30yrs, it didn't seem to be metering the a/o correctly(hard to control flame size and heat, it was safe just couldn't dial it in) but I went ahead and continued to use it anyway. Gasflux CO rod and Gasflux type B flux from HJ. I mitered on a grinding wheel and eyeballed the fit, not too worried about how tight the miters were which in retrospect made it more difficult(filling the larger gaps without mtl runs). I also held the tube in a vise so I wasn't able to readily position it so gravity would help me rather than fighting me. The first batch of pics are from that session, lots of mtl running where I didn't want/need it.

In each of the sessions I took pics of the brazing in progress, as rinsed after the brazing, and then as soaked and cleaned with a wire wheel, no file work. After the second session I took a few minutes and gave a quick filing to one fillet, quickly realized how long it would take(without a dyna file) to clean up all the fillets on a frame if there was much excess brass.

first session, didn't have much heat control, think I burned flux, etc., close up pics of them warts and all












soaked and wire wheel clean up




continued below