A High-Performance HF VFO using the AD9854 DDS IC During the late 1990s, radio frequency homebrewers really began taking advantage of the conveniences that DDS technology offered: 1-chip simplicity, DC-to-30 MHz signal generation ability and relatively decent signal purity. Since then, Craig Johnson, AA0ZZ and others have been creating and refining signal generators using this… Continue reading AA0ZZ IQ-VFO Kit
Author: Mark
PIC-EL Kit – The PIC Elmer 160 Project Board
A flexible and reusable microcontroller project allows you to run ham radio experiments specified in the PIC Elmer 160 course. The PIC-EL is currently available as a partial kit (pcb+limited parts) from the AmQRP Club. The AmQRP “PIC-EL Kit” is a multi-function PIC16F84A-based project board that serves as the basis for the experiments being conducted… Continue reading PIC-EL Kit – The PIC Elmer 160 Project Board
SoftRock-40
A Small, Low-Cost “Software Defined Radio” Receiver Kit For 40-Meters, Used With Powerful Software On The Pc For Multi-Mode Operation The SoftRock-40 is a small, low-cost, good-performing 40-meter “software defined radio” receiver that plugs into a computer USB port and delivers I-Q audio signals to the computer’s sound card. It was designed by Tony Parks,… Continue reading SoftRock-40
Rotary Encoders
Smooth, Mechanical, 48-Pulse Rotary Encoders We had to order a large quantity of these nice, smooth (detent-less) rotary encoders in order to get a low price for use in the Micro908. But as a result, we ended up with LOTS extra … and we’re willing to sell these AT COST (plus mailing) to homebrewers. 2-phase… Continue reading Rotary Encoders
DDS Amp Kit
A Clean, Adjustable RF AMP for DDS Daughtercard Owners or for Standalone Use! The DDS Amp is a “grand-daughtercard” that is used in place of the MMIC amplifiers (MAR, MAV, ERA) provided previously on the DDS Daughtercard. Once you assemble this little kit and install it onto the DDS card, you will be able to… Continue reading DDS Amp Kit
Tuna Tin 2 Kit
The venerable Tuna Tin 2″ QRP transmitter kit is once again available! After having been revived and modernized by KI6DS and NorCal QRP Club a number of years ago, literally thousands have been sold by NorCal, NJQRP and the Ft. Smith QRP Group. Now, the tradition is being kept alive by W1REX and the Maine… Continue reading Tuna Tin 2 Kit
NB6M Paddles
The best part about these paddles is that you can make them yourself in just a couple of hours or so, start to finish. They are made from readily available materials, and cost almost nothing to build. All that is required are some scraps of double sided PC board material, a piece of single sided… Continue reading NB6M Paddles
St. Louis Vertical Updates
The St. Louis Vertical Revisited by Dave Gauding, NF0R Here are a few ideas and observations on the St. Louis Vertical: Radiator Electrical continuity using the Radio Shack 300 ohm in-line connector and the light-duty twinlead leaves something to be desired. The #24 guge stranded wire is serviceable but just doesn’t hold up in repetive… Continue reading St. Louis Vertical Updates
St. Louis Vertical
The St. Louis Vertical (SLV) offers portable enthusiasts an easy-to-build, easy-to-use antenna which: Covers 10-40M via a balanced line tuner (Lots of Bands for the Bucks) Installs independently of external supports (Trees are not required) Is inexpensive (About $40) Is lightweight (45 oz. for antenna, mount and radials) Is really portable (Car, canoe, backpack, bike,… Continue reading St. Louis Vertical