![]() There is no obvious way to adjust the Q of the filter like the superficially similar Procom variants. ![]() It's annoying to have the N ports on the sides but this is probably done for technical reasons. The filter in person, no idea what those shiny circles are (they are not tuning ports or fingerprints) Tuning end of the filter ![]() This seems to have been perfectly adequate, since the filter was still tuned correctly and looked fine. Shipping took several weeks as usual, when it arrived it was packaged in a cardboard box containing a smaller styrofoam box. I ordered mine with a spec of 432-435 to cover the Norwegian 70cm band. The table above contains the specification from the eBay listing. The LBQ-450 filter is sold by several eBay sellers, I bought mine from yee-cssl at a slight discount via an auction listing. ![]() I bought a chinese made 3-cavity bandpass filter and decided to measure it and compare it to some home-made modified duplexer filters. ![]()
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