Used to be a member of this forum a few years back, and have just re-joined, and this is my first post.
I have hunted online on Ebay etc for decent air spaced tuning capacitors and apart from used ones there seems very little available.
Has anybody had luck with suppliers of new ones at reasonable prices? (for use on receivers)
As I am now retired and have time available, I am seriously thinking of constructing one, as I have good access to CNC and metalwork machinery. Just wandered if anyone has tried to construct one?
The rest of the parts have now been designed on Autocad. Below is the rendered 3D view from Autocad, as below:
The 2 bases, front and back will be cut from Acrylic sheet (6 or 8mm thick) and the spacer supports (brown) from 3mm acrylic. (the supports will need to be cut on a laser CNC due to the narrow slots, and the rest of the parts can be cut on a router CNC.
The overall size of the tuning capacitor will not be as compact as the smallest air spaced capacitors available, but should still be acceptable for most purposes. The air gap between vanes will be about 0.5 mm