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December 2018 Diode Tester article correction

| December 6, 2018
December 2018 Diode Tester article correction

In the December 2018 edition of RadCom we published the Multi-Mode Diode Tester article by Dave Ellis, G4AJY. Unfortunately some gremlins crept into the circuit diagram, meaning that it wouldn’t work as intended if built as shown. The main problems were the 1M resistor R4 and the labelling of switch Sw1b.. R4 was incorrectly shown […]

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RadCom download – March 2018

| February 12, 2018

This is the Arduino source code file mentioned in the March 2018 RadCom article Adding a TFT Colour Display to Your Projects by Jack Purdum, W8TEE, Dennis Kidder, W6DQ and Al Peter, AC8GY. Download files (.INO/12KB)* *Arduino sketch file

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RadCom download – December 2016

| November 14, 2016

These files accompany the Replacement Display for the FT-290R article by Dave Crump, G8GKQ in the December 2016 RadCom. They comprise the .asm and .hex files for the PIC microprocessor. Download files (ZIP, 5KB)

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RadCom download – November 2015

| October 6, 2015

This 5MB ZIP file contains design information (including PCB manufacturing files) for the Isolated CI-V Interface project. Isolated CI-V Interface project (5.5MB ZIP)

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RadCom download – September 2014

| September 30, 2014
RadCom download – September 2014

The following downloads support the RSGB Centenary Receiver. Matters arising since publication: The voltage rating for the electrolytic capacitors should be 16V or higher. Some people have reported the 2N3819 FET as difficult to obtain. A number of eBay suppliers  offer them, or a suitable substitute is the BF256B – but note that the pinout […]

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RadCom download – January 2014

| September 30, 2014
RadCom download – January 2014

This 21.6k ZIP file contains the  files to support the G0MGX Arduino Power Meter article. www.rsgb.org/download/g0mgx-arduino-vswr The author spotted  some errors in the circuit diagram after publication and has supplied a replacement. The updated version includes switches on pins 47 and 49 and corrects the connections to pin 8 of the sample & hold opamps IC2 […]

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