The SCR Preselector commercial version
An Elite-Class Operator Preselector
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SCR Preselector in May/June QEX.
The SCR Preselector is featured in the May/June 2008 issue of QEX.
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Click on icon to download the QEX article.
Reprinted with permission © ARRL
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Features:
- Improves your average receiver or scanner to lead with strong signals
on the most noisy and crowded bands and protects the sensitive
front-end components of the receiver.
- Designed to be used as Front-End in Software Defined Radios (SDR).
- Removes radiated signals back to antenna from quadrature mixers.
- Joined to a VFO performs tracking tuning function.
- Complete Front-End for your projects.
- Standalone or PC controlled through a graphical user interface (GUI).
- Full speed USB v2.0 compliant.
- Plug and Play feature.
- Runs under Windows XP and
WindowsVista32 Operating Systems (OS).
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SCR Preselector Graphic User Interface on PC.
It is an executable file, doesn't need to be installed. Runs under Windows XP and Vista32.
Try it!
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The SCR Preselector working with ICOM IC-R5 scanner receiver.
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(Click on picture to enlarge.)
The SCR Preselector working together with a Softrock 40/80m RTXv6.2.
(Click on picture to enlarge.)
SCR Preselctor Circuit Diagram
(Click on picture to enlarge.)
SCR Preselector Transmission Plots
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SCR Preselector prototype.
Aluminum Hammond instrument enclosure model1455T2201.
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SCR Preselector with removed front panel and cover.
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The main board.
It arranges 10 pins IDC connector for digital control.
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Control module
LCD display 3 linesx16 characteres, blue backlight.
The PIC microcontroller 18F4455 is located below the LCD display.
On the right hand two incremental encoders with push switch for
Tuning/Functions and Band /Function Selection.
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Control module assembled on front panel.
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(Click on picture to enlarge.)
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