Hi-Fi System
From Object Wiki
| Hi-fi system | |
|---|---|
 | |
| Manufacturer | (unknown) |
| Production years | 1956 |
| Production location | (unknown) |
Hi-fi system, 1956
This system is a collection of separate parts specially selected for quality and was one of the best combinations available at the time. 1. Jason FM tuner, 2. Collaro model 4T200 record deck, 3. Leak TL/10 power amplifier, 4. Leak Point One pre-amplifier 5. Wharfedale loudspeaker
[edit] How it works
1. Radio signals are made up of two kinds of waves: audio (or sound) waves represent the sounds being sent to the audience and radio frequency waves travel with these sound waves to carry them to radios in homes and cars, for example. All waves have three parts: wavelength, amplitude and frequency. Each can be modulated to carry information.
2. Vibrations from sound waves can produce movement in a needle attached to a diaphragm. If this needle is placed on a rotating surface a groove can be cut. The principle behind the record player is that another needle can then be placed in this cut and, as the record is rotated, tiny indentations in the walls of the grooves move the needle. The needle is connected to a tiny magnet that moves through a small coil. Magnets moving through coils produce current. This current can then be sent to the amplifier, which can then reproduce the original sound.
[edit] Memories
I remember separates. I continue to own and listen to separates. It was great to see H J Leak amplifiers; the first amp I had was a Leak stereo 30, all germanium transistors. It is stored in my loft. I have had only two amplifiers since, a Radford HD250 and a Musical Fidelity P170, all made in England. Good products last.
— Adrian Saull, London
Back a bit more to the 1940s, Hi Fi not quite separate but i did make an amplifier and many radios, speakers on a baffle. Valves, push-pull for power output to reduce distortion. On EMI Research first floor Don McCulloch was an oddie,a chemist. A bit remote from the terms, he called push-pull amplifiers, "Shove and Shift." Pity they did not catch on. On the third floor were the glassblowers, little Stan bought a plan, Make Your Own TV. All credit when he switched on but he hit a snag, heads on screen were in the middle of their chests. Simple fault. Later I made a Bailey amplifier, and owned Leak and Quad II. Never bought gold connection cables, are they a con?
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Do you remember separate Hi-Fi systems? Add your memories. |
[edit] In the Science Museum
Inv: No: 1985-1583
This object is currently on display in the Dan Dare & the Birth of Hi-Tech Britain exhibition at the Science Museum, London.