Episode 125 - Hans Summers - G0UPL
Hans Summers' Links:
Education: Imperial College, London, Physics Degree
Imperial College Amateur Radio Club
RSGB - Radio Society of Great Britain
SPRAT - Official magazine of the G-QRP group
First License: March 1994, Age 23, G0UPL
Hans' Z-80 computer Project
Hans' Nixie Tube project - uses 10 neon digits inside a glass tube
First Rig: All home brew -
QRP Labs WSPR - QRSS/WSPR mode, 6 band transmitter kit.
Career: software design for financial institutions
G-QRP Club - founded by George Dobbs
Favorite construction methods:
SA-602, NE602 Mixer Chip - designed as a 2nd IF mixer for early cellphones
Hans' spectrum analyzer project
QRSS - very very slow CW transmissions that takes advantage of a low SNR to copy CW messages with very low power. Often used for propagation beacons. Modes derived from QRSS is FSKCW and JT65 from
Joe Taylor, K1JT - creator of JT65 and WSPRnet
CW signal to noise ratio
QRSS Software: Argo , Spectrum Lab
Hans' QRSS Rigs use a microprocessor to do the message encoding.
AVR Microprocessor Chip
OCXO - temperature controlled crystal oscillator - only kit built OCXO in the World.
AT cut crystal
Ashhar Farhan VU2ESE - creator of the BitX transceiver
Bitx20 Yahoo Group
Most exciting - huge availability of components and information
VE3KCL balloon launches using WSPR - the tracking logs for 16 balloon flights are on this website behind the QRP Labs website.
Advice to new or returning hams: Build something
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