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Welcome at QRP4Fun!
 
Amateur radio - what's this?
Who I am
Imprint

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News and informations
 
HB0/DK3RED/P - mountains, snow and a radio station
12th - 27th January 2013
Hiking as HB0/DK3RED/P in the Principality of Liechtenstein
14th - 29th July 2012 (in German)
Around the summit Brocken - on the way in the Upper Harz
14th - 29th January 2012 (mostly in German)
On the way on water-waves and on radio-waves
16th - 22nd July 2011 (in German)
Chalk, stones, wind und waves - holiday and ham radio on Rügen
9th - 25th April 2011 (in German)
Around of Iceland as TF/DK3RED/P
15th - 28th July 2010 (in German)
At the end of the world as CE/DK3RED and LU/DK3RED
19th Dezember 2009 - 4th Januar 2010
Wildflowers in the desert - as ZS/DK3RED in South Africa
21st August - 5th September 2009
Festival in the old town of Nauen - amateur radio visualized
9th May 2009 (in German)
Handicraft weekend in Jessern - Spring 2009
24th - 26th April 2009 (in German)
Sand and more - Sandsation in Namibia
14th - 29th March 2008
Andorra - On the way in the Pyrenees
25th July - 3rd August 2007
Between glaciers and geysers - Crosswise by Iceland as TF/DK3RED/P
13rd - 26th July 2006
Kingdom of Nepal - Under the roof of the world
23rd December 2005 - 6th January 2006 (in German)
Ireland, the Emerald Island - QRP DXpedition as EI/DK3RED and MI/DK3RED
25th July - 7th August 2005
3rd Open meeting for QRP, Homebrewing and Youth at the Adlersberg
23rd - 25th July 2004 (in German)
Archiv

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Fascination of QRP and DXing
 
What is QRP operation and what should I consider with it?
What hides itself behind QRP?
Operation mode - not only with a QRP station
Which technical demands required the QRP operation?
Antenna Rules of Thumb by Jim Duffey, KK6MC
Where can I receive assistance?
What are DX stations, how do I find these and how reach I these?
List of DXCC Entities
DXCC results
List of callsign series
Thoughts on Working DX by Jim Duffey, KK6MC
QRP Hall of Fame

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A lot of fun with telegraphy
 
(My) reasons for the use of CW
Structure of a CW character
International CW characters
Enumeration of international CW characters
CW abbreviations
List of CW abbreviations
CW rate and PARIS standard

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Glance in the shack
 
QRP Plus by Index Laboratories SSB and CW, until 5 W, 160 to 10 m
Green Mountain 15 by Small Wonder Labs (SWL) CW, 2 W, 15 m
Modification for the Green Mountain
Green Mountain 10 by Small Wonder Labs (SWL) CW, 1.5 W, 10 m
NorCal40A by Wilderness Radio CW, until 3 W, 40 m
NorCal40A by Wilderness Radio CW, until 3 W, modified for 80 m
K2 by Elecraft Basic unit: CW, until 10 W, 80 to 10 m
Modifications for the Elecraft K2
Spatz by DL-QRP-AG CW, 5 W, 30 m
K1 by Elecraft CW, until 5 W, 4 bands, 40 m, 30 m, 20 m, 17 or 15 m
QRP Automatic Tuner by LDG until 10 W
Modifications for the QRP Automatic Tuner
ZM-2 by Emtech Z-Match: 80 to 10 m, until 15 W
Tuner for multiband Fuchs antenna by Frank Lamprecht, DL7AQT
Construction of the multiband Fuchs antenna
ZM-4 by Peter Zenker, DL2FI Z-Match: 160 to 10 m, until 15 W
Multiband vertical using the Fibreglass Telescope Tower FTT by Walter Spieth, DK9SQ
Vertikal antenne on the balkony (in German)
MP-1 by Super Antennas and follower HF-P1
Can antenna by Arthur Wenzel, DL7AHW
Construction of the can antenna
18 m fibreglas telescope mast by Spiderbeam
Experiences with the 18 m fibreglas telescope mast
Multi-band antenna to use out and about
Construction of the multi-band antenna to use out and about (in German)
10 m GFK Mast Mini by DX-Wire
6 m GFK Portable Mast by Lambdahalbe

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Accessory for the station
 
Sealed lead-acid accumulators
Capacity of lead-acid accumulators (in German)
Charge methods of lead-acid accumulators (in German)
Usage hints of lead-acid accumulators (in German)
Charger for sealed lead-acid accumulator by Egston
Modification to the accumulator charger for sealed lead-acid accumulator
NiMH accumulators by Varta
Charger for NiMH accumulators by Basetech
Straight key by Kent Engineers
Squeezer by Kent Engineers
Wabbler by Kent Engineers
Funky - a key using pressure sensors
Construction of the Funky - a key using pressure sensors
CWF - finger morse key by Gerd Lienemann, DF9IV
Construction of the CWF - finger morse key
Minkey by Englmar Wenk, DK1WE
Palm Portable Key by Palm Radio
Mini Morse Key by Markus Baseler, DL6YYM (BaMaTech)
Dummy loads so far the eye extends
Various dummy loads

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Meters, testers, tools and tips
 
Freq-Mite by Small Wonder Labs (SWL) until 32.767 MHz
PIC Frequency display by Almost All Digital Electronics (AADE) until 40 MHz
Frequency counter without current for all frequencies
SWR-Meter for power from 350 mW to 25 W
MFJ-259B by MFJ SWR Analyzer, 1.8 to 170 MHz
Technical documentations for MFJ-259 and MFJ-259B
L/C Meter IIB by Almost All Digital Electronics (AADE)
Modification for the L/C Meter IIB
WM-2 by Oak Hills Research (OHR) QRP power meter
Modifications for the WM-2
RF/AF probe by QRPproject for RF/AF voltage and RF/AF power until 30 MHz
FA-NWT by Funkamateur sweeper, sinus-wave generator, power meter, 100 kHz to 160 MHz
Extentions for the FA-NWT (in German)
FA-SAV by Funkamateur spectrum analyzer, 1 to 75 MHz and 135 to 148 MHz
Noise generator
Construction of the noise generator
10 MHz frequency standard with RS-GGO10M-TG
Construction of the 10 MHz frequency standard with an RS-GGO10M-TG
NJ Islander
The NJ Islander and ICs
Step drill
Use of step drills
Magnifying glass
Sprat CD-ROM (first edition with issues 1-100)
Installation of the Sprat CD-ROM without floppy drive
BNC-to-dual-post adapter
Coil winding - the easy way
Tutorial Coil winding - the easy way

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Helpful mathematics
 
Parallel connection of resistors
Calculation of parallel connection of up to 5 resistors
Attenuators
Calculation of attenuators
Power attenuators
Calculation of power attenuators
Attenuators with minimum loss
Calculation of attenuators with minimum loss
Signal splitter with resistors
Calculation of signal splitters with resistors
Band spread with variable capacitors
Calculation of band spread with variable capacitors
Resonant circuits
Calculation of resonant circuits
Fuchs network
Calculation of Fuchs networks
Match of resistances with LC networks
Calculation of match of resistances with LC networks
Match of reactances with LC networks
Calculation of match of reactances with LC networks

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Special links
 
QRP clubs
Other QRP stations
QRP equipment and kits
Electronic elements
Antennas and masts

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Software for ham radio operators
 
Spectrogram by Richard Horne AF spectrum
Spectrum Lab by Wolfgang Büscher, DL4YHF AF spectrum
sPlan by Abacom Design of schematic circuit diagrams
Sprint-Layout by Abacom Design of printed circuit boards
Azimuth by Tony Field, VE6YP Beam maps
Mini Ring Core Calculator by Wilfried Burmeister, DL5SWB
AZMap by Paul Burton, AA6Z Beam maps
NCDXF/IARU International Beacon Network
Beacon schedule for the NCDXF/IARU International Beacon Network
VOACAP propagation predictions
HamQTH by Petr Hlozek, OK2CQR free international callsign directory
QRZ.COM international callsign directory
Buckmaster international callsign directory
SelfHTML documentation of the desgin of webpages
MailWasher Free by Mailwsher and
MailWasher Pro by Firetrust filters out spam from e-mails
AntiVir shield virus
Firefox fast web browser
Thunderbird e-mail program with no frills
Formmailer forwarding of web formular datas
Formpost forwarding of web formular datas
Validator of the W3 Consortium error checkup of HTML files and CSS files

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Electronic baubles
 
DCF77 controlled clock by ELV Elektronik

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Food for the soul
 
I love CW
Number problem
Cleaning
I wish you the time by Elli Michler
Inexhaustible power source
When God created the man by an unknown author
Desiderata by Max Ehrmann

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Logbooks and QSL cards
 
Logbooks
QSL cards

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Guestbook
 
Notes for the guestbook

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