Re: ubitx spurs? Added LPF
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Ok, I have mounted the LPF filter in a Manhattan style without any glue so I had more flexibility in positioning the toroids, which are very light. I am not sure I understood your spreadsheet. The filter was assumed to reduce some spurs above the 17m band. I'd tuned at 28mhz you should see a 17mhz spur quite attenuated than without this filter (28+17=45mhz). At 21mhz the spur at 28mhz should be attenuated (21+24=45mhz), so on and so forth for any frequency above the 17m band. You show spurs that are not related in this way. Il 13/apr/2019 11:55, "John Sutter" <jds@...> ha scritto:
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