Hobby Projects - Insulation tester, LED Circuits, Meters.
Showing posts with label Ham-Radio. Show all posts
Showing posts with label Ham-Radio. Show all posts

Sunday, April 03, 2016

Alan Yates Laboratory – vk2zay

"I was born in the late 1970s, mid-year in the local hospital of a coastal part of Australia? Yet another instance of humanity, one of the 6.6 billion or so of us (4.2 billion back then). Doomed like all of us to live out their days on this rock with some clinging gases orbiting a minor star in a relatively quiet part of the local cosmic clump of matter." - Alan Yates

Alan Yates Laboratory - vk2zay

Alan Yates Laboratory – vk2zay

Reflection-pair optical tachometer - The circuit is simplicity itself. There is a red LED to illuminate the target and a photo diode in photo-conductive mode to pick up the reflected light.

One Transistor Voice Transceiver - Building a toy VHF phone transceiver for 3 metres using only one transistor for both TX and RX!

MK484 MW Receiver - A fairly small MK484 based receiver for the AM broadcast band.

40 Metre Spectrum Analyzer - My go at making a JF1OZL-style spectrum analyser for 40 metres.

Nano-Henry Inductance Meter - My implementation of Drew Diamond VK3XU's "Nano-L", plus how I constructed and trimmed my calibration inductances.

Engineering Calculators - Useful online calculators for the Hobby Enthusiast. Ham Radio People and also students and Engineers,

Thursday, February 04, 2016

Telegraph Key and Sounder

Get the Plan Drawings and Make your own Morse Key with a Sounder from J.E. Howell Model Engine Plans.

"The full size plans will allow you to make an exact replica of the key and sounder. The photo above is the "real thing" antique originals. The originals were made in a time when quality was of prime importance and esthetics ran a close second! These instruments were made of brass and steel,"

Western Electric Telegraph Key & Sounder

Telegraph Key and Sounder

--. .-. . . - .. -. --. ... / ..-. .-. --- -- / -.. . .-.. .- -... ...

Use Morse Code Translator to Unravel the Telegraphic Morse Message above.

Thursday, May 22, 2008

K8CU -Bill Jones

K8CU -Bill Jones

Bill Jones, K8CU, has been an active Radio Amateur, CW Dxer, and home project builder since first receiving his Amateur Radio license in 1966 at age 17. Bill is an electronics professional with four-decades of experience.HV Regulator PC board

High voltage regulated power supply for RF amplifiers. This is an enhancement of the article by VE6AXW in July/Aug 1999 QEX. I have redrawn the schematic for clarity, added EMI filtering, included a programmable power on timer, and generated a printed circuit board layout. Works for most voltage values.

Saturday, September 29, 2007

YO5OFH Csaba HAM Radio

YO5OFH Csaba HAM Radio

YO5OFH, Csaba Gajdos from Transylvania, in the north-west part of Romania, in a little city - Satu Mare

Acronyms, CW , Data Sheets, Docs, Ham projects, Photo galery, PIC, QTH photos.

Saturday, September 01, 2007

Homo sapiens to Homo Ludens

A long, long time ago a bright ape figured out that by climbing down from the trees he could more easily master his life, and that of others......Homo sapiens wanted something else, and better. He started to play. Homo ludens was born!

Homo sapiens to Homo Ludens

  • Homo ludens radiactivus - amateur radio
  • Homo ludens radiohistoricus my antique radio collection
  • Homo ludens electronicus - electronic projects
  • Homo ludens aeromodellisticus - model airplanes

Transformers and coils: This is not a building project, but a short and concise lesson in how to design electromagnetic parts. It's much simpler than what you may expect!

Thermal design: A short course in keeping electronic parts adequately cool.

A 40 meter SSB QRP transceiver

A 40 meter SSB QRP transceiver

"This transceiver was conceived as a power-efficient, small, lighweight unit to be carried in the backpack, along with antenna and battery, for use during trekking and mountaineering trips. It had to be reasonably rugged and reliable, and perform well. Furthermore, I wanted it to solve all the problems the old DSB transceivers had, such as frequency instability, distorted modulation, lack of sensitivity and selectivity, and others."

Tuesday, August 14, 2007

Rico Schurig - NH7T/DF2CK - Ham Pages

Rico Schurig - NH7T/DF2CK - Ham Pages


shack, shortwave area

  • WLAN two Port Splitter
  • Waveguide Properties
  • SMA-Relay Properties
  • Helix Antenna Design
  • 23 cm Yagi Construction
  • worked DX vs. Radar Pics


Wednesday, July 11, 2007

QRZ Ham Radio

QRZ Ham Radio

QRZ was founded in 1992 by Fred Lloyd, AA7BQ as a spinoff of what was once called the "Callsign Project", a cooperative effort designed to obtain and distribute FCC database tapes.