HiIn the attached picture you see the notch of the 70cm duplexer I built according to W4NFR's description in QEX, those who can't receive attachments find it here:
http://conturafm.mine.nu/_fh/438.95_notch.bmpThe measurement has been made with both cavities of one branch connected with a true quarter wavelength jumper of RG58 because I had no double-shielded cable available.
Can anybody tell me why the notch is this blurred and what can be done about it? The isolation would be a bit better if the notch was a clear sharp line, isn't it?
Regards Martin
438.95_notch.bmp
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