1318mhz filter

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M0dsr
Posts: 12
Joined: Tue May 13, 2014 7:00 pm

1318mhz filter

Post by M0dsr » Mon May 10, 2021 7:26 am

Has anyone got a filter tuned or can be tuned to 1318mhz that they will part with.
Thanks Nick

radiogareth
Posts: 1215
Joined: Wed Jan 06, 2016 9:46 am

Re: 1318mhz filter

Post by radiogareth » Mon May 10, 2021 9:12 am

Would a BIG pipe-cap filter help? Are you trying to notch out or pass through? I've seen an interesting mod on a UHF cavity (from a diplexer) that turns it into a 23cm notch.
I've made very successful units from 28mm caps for 2.3 and 3.4.
http://www.w1ghz.org/filter/Pipe-cap_Fi ... isited.pdf
Gareth

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