QSO Today Amateur RAdio Podcast - Podcasts

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G0UPL

Posted: 21 Dec 2016 11:52 AM PST
http://www.qsotoday.com/podcasts/g0upl

Episode 125 - Hans Summers - G0UPL As a 2009 QRP ARCI Hall of Fame
inductee - Hans Summers, G0UPL, is an electronic experimenter and amateur
radio innovator extraordinaire. Hans pays careful attention to compact and
minimal parts count to achieve the design goals of his homebrew projects.
Hans is the owner of QRP Labs joins Eric, 4Z1UG, in a conversation about
QRSS slow data transmissions, high altitude balloon transponders, and
shares his ham radio and electronic builder story.
Show Notes Listen to Podcast
Hans Summers Links:

http://www.hanssummers.com - Han's lab notebook on all of his projectsQRP
Labs - Hans kit business with web store Early beginnigs:Started electronics
Age 6Father was a home brewer in tube/valve receiversGrandfather was
electrician on the British Railways
Education: Imperial College, London, Physics Degree

Imperial College Amateur Radio Club

RSGP - Radio Society of Great Britian

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 -One valve ECL8 triode transmitter on 80
metersReceiver: Tayloe Mixer - now the popular front end of all SDR,
followed by a Polyphase networkFrequency CounterAntenna tuning unit G3VA -
Pat Hawker - monthly article in Radcom "tech topics"

Current Rig:
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:Matrix boards (perf board), no copper tracks
on one side. For RF projects: dead or ugly bug construction on single or
double sided copper circuit boardDecoupling capacitor for tie pointHans
never does a PCB project for a one off project Han's test equipmentigital
Volt-Ohm meterFrequency counter - Racal 9911, Heathkit Frequency Counter
with Nixie tube readoutAnalog oscilloscope with digital frequency
readoutSpectrum analyzer Advantest 3361 with tracking generatorDigital
storage oscilloscope, Owon 3103ASignal Generator/VFO
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 Softwa Argo , Spectrum Lab

WSPRnet

Han's 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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Han's Z-80 Computer Nixie Tube Clock QRP Labs U3S
6 Band WSPR/QRSS
Transmitter Kit G0UPL High Altitude Balloon
WSPR Transmitter with GPS