Tag Archives: HB9GZE

Active filter experiments

We look at the basic concepts of active filters, design a 2nd order lowpass with TI’s filterdesign tool and then build a filter and measure the filter performance on the lab bench. Maybe you want to watch the introduction to electronics filters first, since I do reference to that video so what.

Design bandpass and lowpass filter

This is how I did design the bandpass and lowpass filters.

Design a crystal ladder filter

See how I approached the design of a 8 pole crystal ladder filter for SSB @9MHz and with a bandwidth of 2.4 kHz.

Design of the antenna amplifier

Check out how the antenna amplifier got designed, simulated and tested.

Types of Radio Receivers

I did choose to build a super-heterodyne type of receiver. What alternatives do we have?

Introduction Video

Hi all here you find a introduction of the DIY HAM radio transceiver.

DIY HAM radio transceiver

Hi all, I did build my first ham radio transceiver and I thought I let you know how I did it. This might give you ideas about your own HF experiments and give me some feedback from you guys and ideas for new projects. introduction, Types of radio receiver antenna amplifier bandpass and lowpass-filter design […]