Quote:
Originally Posted by Electronic M
You can make a vacuum chamber easily and cheaply enough. Get a pressure cooker from goodwill remove the safety valve and install a fitting for an $89 harbor freight air-conditioning repair vacuum pump (found in the automotive section).
Coil winding machines do show up used for reasonable if you keep your eyes open at various venues... I've considered one that has showed up at my local antique radio club swapmeet a few times.
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My wife does resin work, which also would greatly benefit from a vacuum chamber (similarly for removing tiny air bubbles in the resin)... she would be ecstatic if I built a vacuum chamber. Poking in the DIY tube audio forums, it looks like there are shops that do one-off custom transformers. Looks like they have started getting big into toroidal transformers due to the greater power efficiency.
Toroidy looks like a promising vendor.
The DIY tube audio enthusiasts make me feel much more normal and boring. They go super extreme with their builds, like using industrial strength tubes such as the 833A for power amplification. Wow!