PCB low pass filters

25/11/2009 graat 0

In a discussion I had with Peter, SM2CEW and Graham, F5VHX, the idea grew to make simple low pass filters. Simple but suitable for fairly […]

High Power couplers

30/10/2009 graat 0

On this page there are some high power couplers presented with fair directivity. These couplers cover a rather wide frequency span from 144 up to […]

mW meter

30/10/2009 graat 0

Mw-meter 60dB dynamic range from 0-500 MHz using the AD8307 Photograph of finished unit:   Features: This unit works very well with the couplers described […]