Re: Starting a SE amp project
Watching with interest.
I had a similar issue with the bobbins when I did the two small PP transformers in that I could not re-use the bobbins, so I made two. Guess I am lucky in that I have a small garage with machine tools in there. I milled some brass to be the size of the former plus 1/2mm, then I used some stiff clear plastic from packaging and cut it into strips the width of the winding area. These strips were then formed around the brass former and glued with PVCu Conduit solvent cement as used on plastic drain pipes. When set I formed the cheeks of the bobbins by using some single sided copper clad board etching the copper off it. The filing to fit was the most tedious job to do for me but in lock down not a lot else going on. The cheeks were then araldite'd in place and left for a day to fully set. You may have seen the result on my other post, not brilliant but was better then nothing for me.
Have fun.
Adrian
|