Old radio articles from internet

There must be an Ekco in here!There must be an Ekco in here!
The AC97 was an unusual model even in it's own time. The rather stark, modernist design by Jesse Collins, was straight out of "Metropolis", and must have looked at if it had landed from another planet in the largely Edwardian living rooms of the period. It was unlike any other Ekco before or since, with it's "Mystic Eye" tuning indicator... read more >>

Standard Color Code ChartsStandard Color Code Charts
The Radio Manufacturers Association In 1924, a group of prominent radio manufacturers formed the Associated Radio Manufacturers. This organization was designed to control the licensing of the large number of radio patents so that each member could have access to all the relevant patents necessary to build radio transmitters, antennas and receivers. In the same year, the organization changed its name... read more >>

Sold in seven minutes! - McMichael 135
The firm of McMichael Radio, based in Slough, was established in the early 1920s by Leslie McMichael, in collaboration with design engineer Ben Hesketh. (Until the late 30s, sets carried the initials M-H, which stood for McMichael-Hesketh.) Their sets were very solidly engineered, and made to a high standard. They also went to a lot of trouble with promotion, publicity... read more >>

Sickness caused by an old PyeSickness caused by an old Pye
When I was about 10 years old, a friend at school had an old radio given to him by his grandmother, rather than throwing it away after the radio shop man had pronounced it not worth repairing. It was a big heavy thing, with a door on the back that opened to reveal the mysterious innards, and a cut out... read more >>

Repairing valve radio setsRepairing valve radio sets
Very early sets made in the twenties and early thirties were mostly T.R.F. (Tuned Radio Frequency) design then the superhet (SUPERsonic HETerodyne) circuit was developed and, due to it’s superior performance took over as the basic design of virtually all sets from the thirties to the present day.T.R.F. SetsThe earliest radio sets (1920s to mid 1930s) were known as T.R.F... read more >>

Philco - People power!Philco - People power!
By the mid 30s, wireless was no longer a luxury for the middle classes, but a part of everyday life for many families. Manufacturers realised that there was a mass market just waiting for a cheap, reliable and efficient radio, which could be marketed as such.The concept of mass produced goods for all had originated in America, at first in... read more >>

How Does a Superheterodyne Radio Work?How Does a Superheterodyne Radio Work?
A Historical Background and Theory of OperationThe superheterodyne receiver circuit made it's first appearance on the market in the mid 20's, and represented a great step forward in radio technology. This new circuit offered incredible sensitivity and selectivity, far superior to the regenerative and TRF designs. The better and cheaper superheterodyne circuit soon became the standard of radio receiver design,... read more >>

Crystal setCrystal set
The Crystal Set The Crystal Detector Circuit The Hook-Up or Circuit Circuit With Coupler Difficulty with Selectivity Picture Diagram of Set

The Crystal SetThe crystal set has always seemed the most wonderful of all radio receivers, for with this device we employ the feeble energy of the radio waves alone to vibrate the diaphragms of the phones without aid or reinforcement from local sources of... read more >>

Crystal radiosCrystal radios
I intend to write a series of articles on crystal sets used on the broadcast band, I will assume the reader has a basic knowledge of resonant circuits, along with frequency and wavelength. If you don"t follow please ask or check in a suitable book. Broadcast frequencies are say 535khz to 1600khz with corresponding wavelengths of 560 metres to 187... read more >>

Antique table radioAntique table radio
Around 1920 the wireless radio became available for the rich people.Now, this was a revolutionary development. The world became smaller and was present in the people’s houses. Who didn’t remember as a little child that you were looking at the back of that magical box trying to find the man whose voice was coming out of the front?Of course, nobody... read more >>