Re: Interstage Audio coupling transformer
Yes the advice about supporting the bobbin cheeks while you wind is *very* pertinent. I once wound an inverter transformer (to get 450V@150mA from 12VDC) using a colour LOPT as the core - made up nice Paxolin-sheet bobbins but the unsupported cheeks bulged when I wound them and then when the two cores were fitted there was about a 1mm gap between the ends.
Which contributed to about a 10% reduction in efficiency!
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