70 MHz bandpass filter

03/02/2015 graat 0

70 MHz bandpass filter When working on the 144 MHz bandpass filters, these were tunable over such a wide range that 70 MHz was almost […]

Receive splitters HF

25/01/2015 graat 0

To experiment with 2 receive antennas on the lower bands I  needed some kind of splitter / combiner with some isolation between te ports. A […]

600M Power coupler

24/06/2014 graat 0

Below some photographs of my 300 KHz to 5 MHz coupler. The coupler is build on a Philips core. Probably the TN 36/23/15 3C90 material. […]

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