/diy/ - Do It Yourself

Anonymous Sat Jan 13 21:10:04 2018 No.1313911 [View]
File: 155 KB, 800x639, helix_matching2.jpg [View same] [iqdb] [saucenao] [google]

>>1313896
There aren't really any cardboard tubes readily available in that diameter.

The problem with something like PVC is that in order to do a simple transmission line-like matching network you need to cut out a chunk of the PVC near the bottom but have it support the rest of the coil.

I was thinking about using some kind of foam maybe because it could be easily cut to the right shape. I don't know shit about foam though.

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/diy/ - Do It Yourself

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