Filter hacking for 2395 ISS TV

[g4eml]

I have just finished building the 20MHz bandwidth S53MV design that uses 40 x 40 x 2 tube and is 280mm long.

After a quick tune on 2395 MHz the results look as expected. A nice shape and a -3dB bandwidth of about 17MHz. Insertion loss about 0.3dB. The -30dB bandwidth is about 57MHz.

I used Gareth's idea of 3D printed end plugs with copper tape on the inside faces and these seem to work fine and look good.

I will try to take some plots and pictures tomorrow.

Colin G4EML