0 – 100 MHz – Page 3 – The PA3CSG website

5 pole Cauer filters for the HF bands

30/01/2011 graat 0

To build a solid state amplifier today, one has the availability of many fets. Preferably Ldmos as this is the most sturdy and the most […]

Wide band solid state amplifier for 50 & 144 MHz

30/10/2009 graat 0

This design is based on the Motorola (now Freescale) application note AR305. Instead of using the Motorola FET I used the Philips Gemini FET BLF278 […]

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 […]

45 MHz High Pass Filter

17/03/2020 graat 0

To protect my 50 & 70 MHz transceiver against high RF from the HF station, the antennas are only separated 1 meter apart I designed […]