Double-band Receiver CW/SSB “Lidia-2” (40/80 meters). KIT DiY!

Description

Changes by 16.04.2021
- New design of front panel
- New
High Quality
Aluminum front panel. All labels are printer on aluminum. Looks much much better!
- We replaced standard WH148 potentiometer to Multi-turn one. The tuning is more comfortable.
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Receiver "Lydia-band 2" is a simple direct conversion receiver designed for listening to SSB/CW Amateur radio stations, Amateur radio developed by the Polish Wlodzimierz Salwa (SP5DDJ) at the request of the novice radio Amateurs.
First and foremost, this project is intended for beginning hams, not having much experience in the design of the equipment. And for radio Amateurs who want a weekend to relax and do radio.
The receiver operates in two frequency bands
3.5 - 3.8 MHz (80 meters) and 7.0 - 7.3 MHz (40 meters). 80 meters could be adjusted to US standards -  3.8...4.0 MHz
The main element is a MC3361, which is used in FM receivers with double frequency conversion.
In the receiver used: internal oscillator circuits, mixer and active filter. Bandpass filters at the receiver input, in spite of using axial inductors, provides the appropriate bandwidth, sensitivity, and harmonizing with the mixer. Input sensitivity of the receiver is adjusted by a simple antenna attenuator "Level treble" on the variable resistor integrated with a manual gain control. The VFO (Variable Frequency Oscillator) is running in the circuit with the chokes on 80 m and 40 m, varactors and variable resistor configuration. The stability of the VFO enough to listen to the stations.
In the receiver circuit "Lydia-2 band" it is possible to connect the external VFO or DDS synthesizer.
There is also the possibility to easily connect your digital frequency counter (on-Board there is built-in input).
RX PCB dimensions: 85 x 60
KIT consists of
1. KIT for assembly the PCB. all elements and English manual included.
2. KIT for assembly of frequency meter + 7 segment 0.36" display
3. KIT for assembly of cabinet for receiver:
-
Plastic case dimensions
150х110х78 mm**
- Aluminum F
ront panel.
-
All
control
devices (LED, knobs for potentiometer, power switcher, sockets, plugs)
- Wire for
connections
inside of cabinet
- stands and screws for mounting the PCB and frequency meter
Each KIT has
English
manual.
To build the receiver needs the following instrument:
- soldering iron + accessories
- screw driver to adjust the trimmers and complete a housing.
- head phones 3.5mm (standard socket from any mobile)
The assembly and adjusting takes 3-4 hours.
*
RECOMMENDED FOR NOVICE IN RADIO or those who want have rest for the weekend and enjoy from assembly of the simple receiver.