Watt GS35B Six Meter Amplifier
Low cost Russian triode design with
complete schematic and documentation package.
to 54 MHz 1500 Watt Low Pass Filter
Low cost-high performance filter
you make at home. Easy to make with hardware store parts.
Uses home made Teflon capacitors. Includes detailed mechanical
drawing and design software details.
Voltage Breakdown Tester
Necessary test equipment for amplifier
builders. Tests tubes, vacuum relays, vacuum or plate
blocking caps, and more. Simple circuit. Schematic shows low
cost parts options.
Touch Screen Antenna Rotor Control
Unique universal rotor control.
Works for any rotor with high speed motor shaft access; prop
pitch, commercial, or custom made.
Hints & Suggestions for Z3801A GPS Frequency Standard
everything you want to know about the HP Z3801A GPS Receiver.
Antenna Stack Match
low SWR when two Yagi antennas are stacked. Mounts on tower
with control box located in shack. Flexible Yagi selection.
Code Keyboard with Bug Emulation
Sends both perfect code and the
old-time "bug" sound. Fun to use.
10-30 MHz Log Periodic Antennas
Detailed electrical and mechanical
design package for HF 10-30 MHz log periodic antennas. Rugged
construction, high performance.
free ARRL mechanical design software
Custom Panel Meter Faces at Home
custom meter plates on your PC and print to your
Vacuum Tube Liquid Cooling System
Measure Resistor Noise with the J-Can
Build the N2PK Vector Network Analyzer