Murray Greenman ZL1BPU/ZL1EE
Murray Greenman ZL1BPU/ZL1EE
There is also a section on propagation studies, and some fascinating micro-controller projects to build. The site also hosts Amateur PC software developed by Con Wassilieff ZL2AFP/ZL2EE.
- CMSK for LF/MF -
A specialized weak signal system for the lower phase stable bands (2200m, 600m and 160m), where QRN and man-made
interference are the biggest problems. This is a sophisticated high performance narrow-band DX system.
The modes described here are visually readable, rather than interpreted by electronics or computer. Although some of the modes are new, the idea isn't, and all are fascinating. This is the acknowledged premier site for Hellschreiber techniques.
Most of these modes are for conversation between two or more Amateurs. The emphasis is on performance, especially with low power or under poor radio conditions. This is the official source of MFSK16 and DominoEX documentation.
Narrow Band TV is similar to SSTV, except that sequential frames are transmitted, and the emphasis is
generally on speed (in order to provide realistic motion) rather than image resolution. Several different
and highly successful full colour modes are presented.
An extensive introduction to ionospheric propagation. A small collection of techniques and ideas to assist understanding and
monitoring of ionospheric propagation.
The techniques include passive chirp sounding, PN ranging, narrow-band digital and carrier frequency Doppler analysis.
Here you will find the most complete collection of radio software from Con ZL2AFP, including CMSK, DominoEX,
the Narrow Band TV modes, and a collection of useful utilities. There is also a selection of
utilities by Murray ZL1BPU.
A range of projects based on ATMEL AVR processors. Projects including a rotator controller, signal
generators, clocks and references, frequency counters and transmitters.
To visit any of these areas, click on the titles, links or pictures.
These pages have been written using a simple text editor, for minimum file size and maximum speed.
I believe web pages should be simple, clear, quick to load and easy to use.
For bells and whistles look elsewhere.
Updated 17th February 2010.
My thanks to the folks at 
for hosting my stuff.