Update: Multiplexer

Stein, LB3RE contacted me recently and asked if I could extend the ealier described Quadplexer circuit for use of 160/80/40m. As I already pointed out it is a modular concept. You can just remove the band you don´t need and add another one of your choice.

Here´s one idea for 160m and 80m:

Design values:

                      series L      series C        coupling C

160m                14.05 uH      160 pF            800 pF    

80m                7.50 uH      75 pF            430 pF    

These a values based on a calculation only – I haven´t build up the filter stages for this bands myself!




Good luck Stein and whoever wants to try…

73, Joe


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