PA protection system

22/12/2018 graat 0

In order to provide a more clear overview on the protection system. You will find the blockdiagram below: It consists of the Power / SWR […]

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. […]

Gysel couplers

23/07/2013 graat 0

The Gysel coupler (under construction)   There are many ways in combining amplifiers. Wilkinson dividers, hybrid couplers or rat-race couplers are the best known couplers […]

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