Steve on Twitter: "Today I've been experimenting with a QO-100 QRP TX strip. This included a first attempt at making a Pipe-Cap filter. Initial tests confirm it does actually tune to 2.4GHz!
The usual configuration for a pipe-cap filter is sketched in Figure 1: a metal plate shorting the open end, with probes for inpu
Pipe Caps Filters for Microwave Rigs - KO4BB
Copper Pipe End Cap 10 GHz Bandpass Filters
Copper Pipe End Cap 10 GHz Bandpass Filters
Copper Pipe End Cap 10 GHz Bandpass Filters
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EA4EOZ, an amateur radio electronic enthusiast: Pipe cap filters for 10GHz
The usual configuration for a pipe-cap filter is sketched in Figure 1: a metal plate shorting the open end, with probes for inpu
Pipe Caps Filters for Microwave Rigs - KO4BB
10 GHz PIPECAP FILTER
Pipe Caps Filters for Microwave Rigs - KO4BB
10 GHz PIPECAP FILTER
Pipe cap filter for 6cm | Rauschfunk
Compact 10 GHz transverter [Lötlabor Jena]
Copper Pipe End Cap 10 GHz Bandpass Filters
Copper Pipe End Cap 10 GHz Bandpass Filters
10 GHz PIPECAP FILTER
Croatia microwave: 13cm Pipe-cap filter
M1KTA's QRP ham radio blog: New 13cm pipe end cap filter