Small Projects using PC Boards from ExpressPCB 

In Progress -- Suggestions and corrections welcome 

Updated October 2010


Additional Printed circuit boards are now available

Kits are now available through Chuck Steer, WA3IAC for the following small projects: Bargraph, Fan speeed controller, Sequencer, LED voltage monitor and RF power Reference. Email Chuck for pricing and availability at [email protected]


New - Miniverter-F

A 2-meter transverter for Flex-1500 and Microwave Transverters

Miniverter-F for 2 meters, also 222 or 432 MHz

NEW! *PC Boards available*


New - A Personal Beacon for 10 GHz

10 GHz Personal Beacon or LO for 8 to 12 GHz

NEW! *PC Boards available*


Multiband Microwave Transverters for the Rover

902, 1296, 2304 and 3456 MHz Simple and Cheap

NEW! *PC Boards available*


An Even More Fool-Resistant Conditional Sequencer

Even More Fool-Resistant Conditional Sequencer

NEW! *PC Boards available*


Power Detector Board - VHF thru 10 GHz

Power Detector IC good to > 10 GHz

*PC Boards available*


From QST April 2007 "Microwavelengths"

RF Power Reference for power meter calibration


Microwave Update 2005


A Homebrew Ratiometer for Antenna Measurement, or a Handheld Network Analyzer


Updated 20 March 2007



LED bargraph indicator used above

*PC Boards available*



Battery-sharing Switch
*PC Boards available*


Chassis mounts and distribution boards for PowerPoles

Anderson PowerPoles are the connector of choice for 12 volt operation

*PC Boards available* - distribution board for 4 or 5 PowerPoles

All-band portable power meter - 160 Meters to 10 GHz
Kit ABPM now available from Down East Microwave

Assembly Notes and Pictures


Fan speed controller - fan runs with a gentle purr at room temperature, speed increases as temperature rises. Can sense heatsink temperature.

*PC Boards available*



Lossless Current Monitor - 20 or 50 Amps

*PC Boards available*



LED Voltage Monitor -
A Single LED Battery Status Indicator for the Rover

*PC Boards available*



Utility Board for Op-amps and Comparators

*PC Boards available*



Tonemeter -
An Audio Tone Indicator for Tuning or Antenna Measuring

*PC Boards available*



A Voltage Standard for the Hamshack


Printed Hairpin Filters -
Designed using Ansoft Serenade SV software


222 MHz Transverter for the FT-817
 

Download Miniverter article



Two-stage MMIC amplifier in Pomona box



Simple, yet still "fool-resistant," sequencer for microwave transverters 


Enhanced version of "fool-resistant" sequencer with Power Output LED



Load tester for batteries and power supplies



  What's this ExpressPCB stuff, anyhow?
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