QRP Antenna Tuner
This circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short wave amateur radio bands from 3-30 Mhz. It allows a wide variety ...
ATL-3 Loop Antenna
This antenna is the result of long term development and user feedback.
All ATL-3 loop windings are centre tapped and balanced w.r.t. their amplifier/receiver...
Q-Multiplying Loop Antenna
This circuit is designed to be used in conjunction with the standard 4 foot square loop used in MW for long distance reception....
50 MHz converter
This is a very sensitive 50Mc converter allowing you to receive the entire "Magic Band" (50Mc...52Mc) on your general coverage receiver (28Mc...30Mc). It receiv...
LW, MW and SW bands Receiver
This is a compact three transistor regenerative general coverage receiver with fixed feedback. It`s based on the principle of the ZN414 only much higher coverag...
AM/cw 12-meter band transmitter
CW is the simplest form of modulation. The output of the transmitter is switched on and off, typically to form the characters of the Morse code.
CW transmitter...
AM/cw 10-meter band transmitter
In this project, you will make a simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillat...
AM/cw 20-meter band transmitter
In this project, you will make a simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillat...
1watt AM/CW 10-meter band transmitter
In this project, you will make a simple 3-stage low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM ...
Vipor mutant portable HF/VHF/UHF
Most of us don`t have the luxury of building a 1/4, 1/2 or even a 5/8 wavelength vertical antenna for HF. We have to settle for something a little shorter. (A l...
VHF/UHF Wideband Portable Dipole
I wanted a robust, portable, compact antenna usable for horizontal and vertical polarisation to take along with my FT-817 when I go on vacation, camping etc. I ...
VHF Portable "rubber duck" antenna
You can make your own 2-meter "rubber duckies" that will likely perform much better than many commercial units. I compared my design with two other "rubber duck...
Optimized 6-element UHF Yagi Antenna
The elements diameter of the antenna may vary between 5...8mm and the dipole diameter may
vary between 8...12mm (12mm recommended) without the need of changing...
Optimized 10-element UHF Yagi Antenna
The elements diameter of the antenna may vary between 5...8mm and the dipole diameter may
vary between 8...12mm (12mm recommended) without the need of changing...
VHF 5/8wave vertical antennas
At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used. The VHF 5/8-wavelength (144 Mhz) vertical monopole has long h...
Optimized 6/9 element VHF Yagi Antenna
The computer optimized 9 el. homebrew antenna is performing very well. I have
made many long distance contacts using the ON6MU VHF Yagi antenna. I have the ant...
88-108 Mhz to AM broadcast band
I designed this circuit. It can be connected to an FM tuner to play FM stations on an AM radio....
from 42 to 88 Mhz Band
The FM broadcast band was moved immediately after World War II from its original spot just below 50 Mc to the present 88-108 Mc band. Hallicrafters was one com...
Tune six metres on your two metre receiver
This converter allows reception of six metre signals on a two metre receiver. It should therefore be useful for those with single or dual band sets that do not...
FM Wireless Mic
FM Wireless Mike can transmit voice signals to any FM Radio receiver 100 meters away. The circuit is basically a frequency modulated transmitter working at 100 ...