HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).
HF Receiver "MARIA" (20, 40, 80 meters).

HF Receiver "MARIA" (20, 40, 80 meters).

Regular price
$38.00
Regular price
Sale price
$38.00
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per 
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Soldering Project Kit

Working bands: 80, 40 and 20 meters.


One of the prototypes of the proposed receiver was published in ham radio magazine in 1999. Despite the past years since the publication, the ease of assembly of the receiver, high repeatability, availability of inexpensive components allows this design to remain very popular among beginners and experienced radio Amateurs. Indeed, the ability to listen to three Amateur radio bands looks very attractive. In addition, by adding automatic gain control (AGC) to the receiver, there is a tangible comfort when listening to radio stations. Finally, the size of the PCB allows you to make the receiver lightweight and compact (PCB dimensions 101x49mm).


Direct frequency conversion receiver. The principle of this system is very simple: the heart of the receiver is the SA612 chip – a high-frequency mixer-generator, followed by the integrated circuit of the LM386 low-frequency amplifier. Since the frequency of the local oscillator (or its harmonics) is relatively close to the reception frequency, the difference is only in the low-frequency spectrum. The sum (as any good mixer subtracts and adds at the same time) is in the high frequency spectrum and as a consequence is completely suppressed by the low pass filter. There is no intermediate frequency in the receiver, which greatly simplifies this type of receiver, and the quality remains unusually good. The clarity of the signals, especially in the CW mode.


Recommended for novice and experienced ham radio.


KIT consists of 
1. English MANUAL
2. All necessary components for building of Receiver
3. 4-bit 0.36" display
4. The cabinet:
   - Metal cabinet 110х110х60 mm (0.8mm metal)
   - Aluminum F
ront and back panels with self-glue (need to mount as frequency meter mounted to the panel - it will make invisible the screws)
   - 
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

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 5-6 hours (We recommend the following plan: 1st day - building motherboard + frequency meter and 2nd day - put the Receiver to the cabinet).

Customer support is provided in case of difficulties with building or open questions. 


*
RECOMMENDED FOR NOVICE IN RADIO or those who want have rest for the weekend and enjoy from assembly of the simple receiver.