Home-made General Coverage Receiver - HGCR (10 kHz - 30 MHz)

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Description

With this home-made receiver I learned very much from engineers of the past century. My homebrew creed was "old knowhow combined with modern building stones". Many premium receivers from the era of the great analogue receivers were studied by me as models. In relevant forums, some RF experts became aware of my work and supported me with their Expertise. Cordial thanks considering that!

The receiver covers the frequency range from a few kilohertz to 30 MHz. Most of the modules are designed as 50-Ohm modules. Within certain limits (level plan and so on), each module can be planned, built, measured and improved on its own. Important requirements were a high large-signal immunity ((high intercept points, low phase noise and so on) and contrary along with it a good sensitivity, selectivity, narrow-band operation, low intrinsic noise and of course the availability and processability of components. A relevant point was also the existing hobby measuring equipment.

Not all challenges could be solved as a hobby self-builders and the receiver will probably never be completely finished, there is always something to improve...

Provisional I publish - a little bit disorderly - my working process without further comments. An accurate description with more details follows. And in addition a tip off: It's all carefully thought out, but I think it's not an beginner or a weekend project - be warned folks...

 

Block Diagram and Units

HGCR2010_BLK.jpg
Block diagram
HGCR2010_UTS.jpg
Units overview
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Schematics of the moduls

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Pictures of Prototypes


Bella.jpg
RX design
HGCR01.jpg
Early stage
HGCR02.jpg
Input Filter
HGCR03.jpg
First Mixer
HGCR04.jpg
Early test
HGCR05.jpg
IF Amplifier
HGCR06.jpg
Test configuration
HGCR07.jpg
First IF unit
HGCR08.jpg
Second Converter unit

References

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