ARTICLES

!LATEST ARTICLE!


*The Magic of Radio in the 50's*

WRITTEN BY: DARRON SANCHEZ | PUBLISHED BY: K9YA TELEGRAPH
Volume 11, Issue 11, November 2014

 

I remember when I was 11 years old in 1950. For Christmas my Mother and Father gave me a radio in a cardboard box because I was always fooling around with some kind of radio. The radio was the most exciting present I had ever received.

read more

 

 

 

The Mighty Little Rockmite XCVR
WRITTEN BY: DARRON SANCHEZ | PUBLISHED BY: K9YA TELEGRAPH
Volume 11, Issue 7, July 2014

 

Building and working the little Rockmite radios was done to see just how low you could go in power and still make a reliable radio contact.

read more

 

 

 

 

 

The EIusive Airchamp 200
WRITTEN BY: DARRON SANCHEZ | PUBLISHED BY: ELECTRIC RADIO
ISSUE #298, MARCH 2014

 

The rebuild of this radio was an exciting adventure as it brought back many fond memories of my first encounter with radio.

read more

 

 

 

 

 

 

The Dreaded Black Code Machine
WRITTEN BY: DARRON SANCHEZ | PUBLISHED BY: EHAM.NET
ARTICLE# 8396, May 17, 2004

 

This is the true story about how I got my Ham license at the FCC Office in New Orleans, LA.

read more

 

 

 

 

 

 

The Loooong Project
WRITTEN BY: DARRON SANCHEZ | June 9, 2005

 

How strong of an impression is made on a young child that took most of his life for this project to come to fruition. Here is a story about the little "Sucker Stick Transmitter", the receiver and the power supply..

read more

 

 

 

The A/N X-15 Galactic Transceiver
WRITTEN BY: DARRON SANCHEZ | PUBLISHED BY: EHAM.NET
March 31, 2005

 

 

This is an April Fools story that includes myself and a friend with fictious call letters.

read more

 

 

 

 

 

ARTICLES
The Magic of Radio in the 50's

I remember when I was 11 years old in 1950. For Christmas my Mother and Father gave me a radio in a cardboard box because I was always fooling around with some kind of radio. The radio was the most exciting present I had ever received.
read more

The Elusive Airchamp 200

The rebuild of this radio was an exciting adventure as it brought back many fond memories of my first encounter with radio.
read more

The Mighty Little Rockmite XCVR

Building and working the little Rockmite radios was done to see just how low you could go in power and still make a reliable radio contact.
read more

Dreaded Black Code Machine

This is the true story about how I got my Ham license at the FCC Office in New Orleans, LA.
read more

The Loooooong Project

How strong of an impression is made on a young child that took most of my life for this project to come to fruition. Here is a story about the little "Sucker Stick Transmitter", the receiver and the power supply.. read more

The A/N X-15 Galactic Transceiver

This is an April Fools story that includes myself and a friend with fictious call letters.

read more

A MOMENT IN TIME

THE VACUUM TUBE


In 1904 John Ambrose Fleming invented the first practical Electronic tube. It was called the Fleming Valve.

 

The Fleming valve, was a vacuum tube (or "thermionic valve") used as a detector for receivers in electromagnetic wireless telegraphy.

Fleming Valves
Early commercial Fleming valves used in radio receivers, 1919

 

Fleming also invented the Vacuum tube Diode.

The Audion was an electronic amplifying vacuum tube invented by American electrical engineer Lee De Forest in 1906.

 

Fleming Valves
De Forest Audion from 1906

It was the first triode, consisting of a partially evacuated glass tube containing three electrodes; a heated filament, a grid, and a plate.

 

It is important in the history of technology because it was the first widely used tube which could amplify; a small electrical signal applied to the grid could control a larger current flowing from the filament to plate.

 

In 1920 RCA began the first commercial electron tube manufacturing.