for Issue #2
HOMEBREWER #2 - CONTENTS
Micro908 Antenna Analyzer II G. Heron, N2APB and J. Everhart, N2CX
Here’s a low cost, portable, microcontroller-based instrument that automatically determines SWR and reactance characteristics of an HF antenna system. Advanced features of DDS frequency control, LCD tuning display, PC data collection and plotting, numerous operating modes and easy software upgradability make this design attractive for homebrewers and antenna enthusiasts.
RF Power Meter Cookbook II Joe Everhart, N2CX
We learned last time that transmitted power is surprisingly tricky to measure -- especially so at QRP levels. N2CX continues the saga of measuring low power levels by presenting some basic circuits and explaining the subtle nature of their use. Gain a firm understanding of the building blocks in this installment.
Aaron's Clock, No Hands Required Mark Spencer, WA8SME
Typical of any new Ham, Aaron, KD7UCD, wants to operate his station in accordance with the FCC regulations and in a responsible manner. He also is enthusiastic about participating in all of the public service operation opportunities that are open to him now that he is a Ham, including ARES and SKYWARN. Unlike the typical Ham though, Aaron is blind, which complicates many things for him.
Manhattan Project = Sidekick Rx + Tx Jeff Grudin, AC6KW
I wanted more than just building a kit with components that get stuffed into pre-made pc boards. I really wanted to make things as my dad had from the schematic with an understanding of how it all worked. What follows is intended as an inspirational piece for those of you saying “I think I can, I think I can ...”
Multi-band Coil for the PAC-12 Antenna James Bennett, KA5DVS/6
Did you build the award-winning PAC-12 multiband portable antenna designed by KA5DVS when it originally appeared in QRP Homebrewer #8? Or perhaps get the kit version from Pacific Antenna? If so, you’re in for a real treat as James describes how to homebrew a single coil for multiband use.
Build the PicWx APRS Weather Station Dave Ek, NK0E
NK0E started this series with a simple PIC16F84A design and has since been adding various hardware and software pieces to create a functional weather station that connects via serial port to your PC or ARPS system. The PicWix project is being presented in a tutorial fashion ... follow along!
Universal Power Supply Dave Ottenberg, WA2DJN
Here’s a simple power supply you can build for the bench for all those common voltages used in your HOMEBREWER projects!
Melt Solder DDS Controller Steve Weber, KD1JV
Steve “Melt Solder” Weber is a master with the ATmel controller chips and he’s designed a circuit with the NJQRP DDS Daughtercard that is super feature-rich. The project serves as a multi-band QRP transmitter on the HF ham bands, with paddle input, dual-memory keyer and speed control, programmable IF offset, EEPROM-stored settings, RIT and XIT split mode operating, LCD display, Rx mute, Tx sidetone generation, and logic to drive an antenna selection relay … Wow!
Manhattan-Style Building Techniques - II Cuck Adams, K7QO
Last time, master homebrewer K7QO described the basics of material and tool selection and how he successfully prepares for the project construction. Now read how Manhattan pads are created, mounted and used as circuit nodes on the bare copper-clad base board.
TTAM: Test Topics And More Joe Everhart, N2CX
TTAM this time features an integrated theme. Each section describes an aspect of Field Strength Meter (FSM) technology. The first section, Designed for Test, gives a brief overview of FSM telemetry and describes the basic module used for the remote-reading function. Then Coming To Terms defines terms and a method for preprocessing the information to be sent to make it easier to interpret. Finally Stimulus and Response gives some clarification and enhancement for adjustment of the NJQRP FSM, the Sniffer.
QRP Operating: “Well-Oiled Dummy Load” Richard Fisher, KI6SN
Regardless of the power level at which we operate, in front of mind is good amateur practice – clean, melodious signals and an adherence to operating procedure and codes that would make the late Hiram Percy Maxim, W1AW, proud. To that end, this quarter’s QRP Operating looks at a well known, but not-often-enough-used station accessory that allows testing of transmitting gear without sending signals – good or otherwise – into the ether. Every radio experimenter should have a non-radiating RF dummy load in his radio shack.
Radio To Go: “Antennas To Go” James Bennett, KA5DVS/6
Last time around, we looked at options for portable power. This time I will cover some options for lightweight portable antennas and take a look at what works and why.
QRP in the Great Outdoors Ron Polityka, WB3AAL
The other day I was asked a question from a fellow QRP operator. He would like to take his QRP radio to the field and operate from the Great Outdoors. Joe was wondering what he would need for a day trip. This is a very good question that many people never give too much thought; they just make the mad dash out to the wilds.
Tuning Up: “Sniff, Sniff, Sniff” Richard Arland, K7SZ
Why does the average ham need a Field Strength Meter? Quite literally, this one device can be used to do a multitude of things including: checking transmitter output and the outputs of various stages within the transmitter, comparison of antennas in the near and far RF fields, obtaining a rough estimate of a directional antenna pattern, and sweeping your shack for RF bugging devices – hey, I’m not paranoid!
QRP Contesting Ken Newman, N2CQ
I'm guessing that the average HOMEBREWER subscriber is "melting solder" more often than into contesting. QRP however has many other fun outlets and what could be more fun than making your own rig or kit and using it in a contest to see how it well does? Plus, three month forecast of contesting events.
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Page last updated: May 21, 2004