QRP set OK1DPX
experimental receiving and transmitting equipment

Quattro oscillator 7,000 - 7,042 MHz is shown below, in the center column. Above it is an accessory of transceiver 7 MHz, 10 mW to 5 W, and above that a digital dial. In the left column, on the bottom is a network source 13,8 V, 2 A, in the center is a battery source 1,5 Ah with digital clock, and on the top is an FM receiver. On the right column, below is a dot-dash generator, in the middle is a Morse decoder, and on the top is an antenna tuning unit. At the top of the equipment stand is a halogen light.

In the foreground from left to right is the TUNIT-analogue tuning unit, the Morse keyboard, the double-levered microswitch paddle, and a small straight key. In the back-left is the loudspeaker case, and on the right is the electro-magnetic field indicator and a dummy load with wattmeter.

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QRP Set - main parts

Quattro-oscillator    Four-crystal oscillator with wide tuning and constant RIT for the direct-conversion transceiver.    MicroPot for easy setting. Possible by automatic tuning system - TUNIT.

TUNIT - Universal tuning unit    The analogue tuning system for monitoring on a chosen part of the band.

Accessory of transceiver    Receiving and transmitting circuit. When attached to the Quattro oscillator    it becomes the QRP CW TCVR with an output 10 mW  to 5 W. In Czech so far.

Digital dial    Measures the frequency to 30 MHz. In Czech so far.

Double-source, network and battery    Produces 5 to 14 V, 2 A. Accu has 1,5 Ah. It also has a DFC radio-controlled    clock. In Czech so far.

Equipment stand    It has a modular design with a 5 W, 12 V halogen light. In Czech so far.

Loudspeaker case    Five input and two output. In Czech so far.

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Transmitters
Here you can see some transmitters of today which are out-of-date and unused. They are here only for information purposes.

CW QRPP transmitter 7 MHz    Can be tuned to 30 kHz.

CW QRPP transmitter 3,5 MHz    An article taken from the Amatérské Radio magazine. In Czech only.

.    Tube CW QRP transmitter 1,8 MHz    A design from the time when a program for editing designs was only a dream.

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Receivers
For amateur radio listening. Here are also broadcasting receivers.

CW-BC audion 7 MHz    A very simple receiver for beginners.

Direct-conversing receiver 1,8 + 3,5 MHz    An article taken from the Amatérské Radio magazine. In Czech only.

FM receiver    Simple construction for your free time. In Czech so far.

AM receiver    A direct-amplified receiver for beginners. An LED is used as a bias stabilizer    for the detecting diode, TV module as an audio amplifier.

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Telegraph keys & accessories
Telegraph communications are possible with the most simple equipment. It is an irreplaceable first step in getting to know radio technology. This is the reason to Morse Code on amateur band radio hasn`t disappeared.

Morse-code keyboard    Keying speed 8 to 41 wpm, 10 memories, very small.

Morse decoder    Kit with some improvements. In Czech so far.

Dot-dash generator    Just some small improvements. In Czech so far.

Keys and paddles    Straight key, Microswitch key, Jambic paddle, Microswitch paddle,    Sensor paddle.

FischerTechnic jambic paddle    An illustration of how it is possible to quickly test out new principles and construction.

Multi-function key    Useful for transmitter without side-tone listening, Morse code practice, telegraphic    wire connection, simple test of circuits and components.

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Aerials & accessories
There is not too much about aerials here yet. It is because we have a great LPDA ...

LPDA - Log-periodic dipole array 7 MHz    A wire dipole antenna, gain of about 10 dB.

Dummy load    Tin from tea, full of the vegetable oil. In Czech so far.

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Home QRP-radio lab
To inspire children, students, parents and teachers, we have set-up a model lab. With the use of older measuring and some manufactured aids, we are able to develop simple and more intricate equipment.

The work area    Equip your room with a measuring device, develop your own circuits. In Czech so far.

The multi-meter holder    The measuring gauge is in the most efficience place, with a power supply and connector    for resistor measuring. In Czech so far.

Testing board with the non-solder contact field    It allows the quick testing of uncomplicated circuits. In Czech so far.

Testing solder board    Essential for serious work in radio experimenting. In Czech so far.

Documentation holder    It holds down schematic diagrams, catalogue card. In Czech so far.

Drill bit holder    A small drill is always at hand. In Czech so far.

A third hand    A mounting stand holds the printed-circuits-board, devices, wires. In Czech so far.

The Home-lab    A kit for quick experimenting with printed-circuit-boards of different types.    An article taken from the Praktická Elektronika a Radio magazine. In Czech only.

A funny surprise    A unusual decoration for your amateur radio corner.

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Ideas & topics
How to do it?

The quick make of one or several PCB
Even after many years, it can still be useful. In Czech so far.

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QRP-beginners course
At this course, the boys build different devices, listen to radio operations and prepare for an amateur radio examinations.

QRP-beginners course, part 1    We learn Morse code, we build short-wave receivers.

QRP-beginners course, part 2    We make the testing boards and develop power sources.

QRP-beginners course, part 3    We erected the long-wire antenna, and tried out the Crystal radio set.

QRP-beginners course, part 4    We assemble a Direct-amplified receivers for medium waves.

QRP-beginners course, part 5    We build an MPK-1 multi-function keys.

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Re-useable sources of energy
Our QRP ham-shack is powered by an accumulator energized by the sun and by wind.

Control panel for re-useable sources of energy    Scrap devices and renovated accumulator.

Wind generator    An original construction of a propeller.

Water powered generator    It produces 80 W, 24 V. In Czech so far.

Photovoltaic cells    The panel faces south and produces 25 W, 18 V of power.

Ecological park project    Original plans suggested for the use of a property near the Q-club.    We are looking for sponsors to make these plans possible.

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Variables
You can find here a QRP story, an attempt of a small sci-fi, a little about a work-life experiences, files showing interesting pages and some other ...

QRP is an exciting discovery
A story - Tom is speaking with his friend about amateur radio and QRP progress.

TOAST - QRP transceiver of the near future    What will the new QRP equipment look like? Who will build it first?

The strait tips for your lab
Life experiences.

Favorites
My favorite ham-pages.

A few poems and pictures    It takes more than technology for man to stay alive!

Personal page    A few words about the author.