Home

This website is developed by Georgi Dachev (LZ2GL) and Ivan Dachev, it is for our radio amateur work.

Here you will find:

  • SSB transceivers and antennas.
  • Frequency, LC and other meters.
  • Microprocessor programs and software.
  • Other electronic techniques and devices.
Bedini Medical Machine – Zapper

Here you will find our development of Jhon Bedini medical machine, also known as Zapper. It can help to the human body to fight against most

Bipolar Power Transistor Tester h21E

Here you will find our development for a bipolar power transistor tester. It measures the short-circuit forward current ratio (Iout/Iin @Vou

Pure Sine Wave Power Inverter 3000W

Here you will find our home made pure sine wave power inverter based on SPWM EG8010. It converts 48V to 220V with 3000 watts output. Gal

HF Power Amplifier 1kW

Here you will find information about our home made 1000 wats HF power amplifier. Gallery [foogallery id="1649"] Schematics [caption id

Analog Power Supply 50V/50A (28V/85A)

Here you will find our home made analog power supply with output 50V/50A or 28V/85A at 220V. It is based entirely on analog processing. We a

Antenna Splitter 1..60MHz

Here you will find information about our antenna splitter working in diapason 1..60MHz. That is used with our famous V-Star Antenna. Shemat

SDR-1000 Schematics

Here you will find schematics for our version of the popular SDR-1000 transceiver, it uses DDS AD9854 from Analog Devices. Schematics [cap

SDR-1000 Description

During 2008-2009 we constructеd our own version of SDR-1000 transceiver based on information in internet, it uses DDS AD9854 from Analog De

V-Star Antenna

Here you will find information about our V-Star antenna from 1MHz to 32MHz. It is constructed from design instructions by Karl Rothammel.

Antenna Tuning Device

Here you will find information about our antenna tuning device. It is made ​​to be able to adjust a V-Star antenna for frequencies from

Home PCB Making

Here you will find how we make our PCB at home for prototyping. We are using photo etching with the Positive 20. Gallery [foogallery id=

PIC16 Programmer

Here you will find information about our home made PIC16 programmer. We had used it to do all of of the programming in the earlier years. No

PIC16 Controlling LCD

Here you will find source code and schematic for controlling LCD based on Hitachi HD44780U with Microchip PIC16 microcontrollers using onl

Frequency and LC Meters

Here we have put the diagrams of our devices for measuring frequency, inductance and capacitance. Options Frequency meter v3.1 (2003

New Radio IF 9MHz Commands

Here are pictures of LCD panel in different modes of transceiver with commands description. Base Functions Shows RX/TX receive or tran

New Radio IF 9MHz Schematics

Here you will find schematics for our homemade new SSB/CW transceiver. Synthesizer is based on DDS AD9832 from AnalogDevices and controlled

New Radio IF 9MHz Description

In the period 2004-2005 we constructed our new transceiver where its frequency synthesizer is based on DDS AD9832 from AnalogDevices, and a

Old Radio Description

In 2000-2001 we constructed our first transceiver with a frequency synthesizer that is controlled by PIC16F84/88 microprocessor from Microc