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The History Of Car Radio

Sal1950

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Fun stuff, I'm not entirely sure of the articles history. LOL

HISTORY OF
THE CAR RADIO
Seems like cars have always had radios,
but they didn't.

Here's the story:

One evening, in 1929,
two young men named
William Lear and Elmer Wavering
drove their girlfriends to a lookout point high above the
Mississippi River town of Quincy, Illinois, to watch the sunset.

It was a romantic night to be sure,
but one of the women observed that
it would be even nicer if they could listen to music in the car.



Lear and Wavering liked the idea. Both men had tinkered with radios (Lear served as a radio operator in the U.S. Navy during World War I) and it wasn't long before they were taking apart a home radio and trying to get it to work in a car.

But it wasn't easy: automobiles have ignition switches, generators, spark plugs, and other electrical
equipment that generate noisy static interference, making it nearly impossible to listen to the radio when the engine was running.

One by one, Lear and Wavering identified and eliminated each source of electrical interference. When they finally got their radio to work, they took it to a radio convention
in Chicago.

There they met Paul Galvin, owner of Galvin Manufacturing Corporation.
He made a product called a "battery eliminator", a device that allowed battery-powered radios to run on household AC current.
But as more homes were wired for electricity, more radio manufacturers made AC-powered radios.

Galvin needed a new product to manufacture. When he met Lear and Wavering at the radio convention,
he found it. He believed that mass-produced, affordable car radios had the potential to become a huge business.

Lear and Wavering set up shop in Galvin's factory, and when they perfected their first radio, they installed it in his Studebaker.

Then Galvin went to a local banker to apply for a loan. Thinking it might sweeten the deal, he had his men install a radio in the banker's Packard.

Good idea, but it didn't work Half an hour after the installation, the banker's Packard caught on fire. (They didn't get the loan.)

Galvin didn't give up. He drove his Studebaker nearly
800 miles to Atlantic City to show off the radio at the
1930 Radio Manufacturers Association convention.

Too broke to afford a booth, he parked the car outside the convention hall and cranked up the radio so that
passing conventioneers could hear it.
That idea worked -- He got enough orders to put the radio into production.

WHAT'S IN A NAME
That first production model was called the 5T71.

Galvin decided he needed to come up with something a little catchier.
In those days many companies in the phonograph and radio businesses used the suffix "ola" for their names -

Radiola, Columbiola, and Victrola were three of the biggest.

Galvin decided to do the same thing, and since his radio was intended for use in a motor vehicle, he decided to call it the Motorola.

But even with the name change, the radio still had problems:
When Motorola went on sale in 1930, it cost about $110 uninstalled, at a time when you could buy a brand-new car for $650, and the country was sliding into the Great Depression.
(By that measure, a radio for a new car would cost about $3,000 today.)

In 1930, it took two men several days to put in a car radio -- The dashboard had to be taken apart so that the receiver and a single speaker could be installed,
and the ceiling had to be cut open to install the antenna.

These early radios ran on their own batteries, not on the car battery, so holes had to be cut into the floorboard to accommodate them.

The installation manual had eight complete diagrams and 28 pages of instructions. Selling complicated car
radios that cost 20 percent of the price of a brand-new car wouldn't have been easy in the best of times, let alone during the Great Depression.

Galvin lost money in 1930 and struggled for a couple of years after that. But things picked up in 1933 when Ford began offering Motorola's pre-installed at the factory.

In 1934 they got another boost when Galvin struck a deal with B.F. Goodrich tire company to sell and install them in its chain of tire stores.

By then the price of the radio, with installation included, had dropped to $55. The Motorola car radio was off and running.
(The name of the company would be officially changed from Galvin Manufacturing to "Motorola" in 1947.)

In the meantime, Galvin continued to develop new uses for car radios.
In 1936, the same year that it introduced push-button tuning, it also introduced the Motorola Police Cruiser, a standard car radio that was factory preset to a single frequency to pick up police broadcasts.

In 1940 he developed the first handheld two-way radio
-- The Handy-Talkie for the U. S. Army.

A lot of the communications technologies that we take for granted today were born in Motorola labs in the years that followed World War II.

In 1947 they came out with the first television for under $200.
In 1956 the company introduced the world's first pager; in 1969 came the radio and television equipment that was used to televise Neil Armstrong's first steps on the Moon.

In 1973 it invented the world's first handheld cellular phone.

Today Motorola is one of the largest cell phone manufacturers in the world.

And it all started with the car radio.

WHATEVER HAPPENED TO
the two men who installed the first radio in Paul Galvin's car?

Elmer Wavering and William Lear, ended up taking very different paths in life.

Wavering stayed with Motorola. In the 1950's he helped change the automobile experience again when
he developed the first automotive alternator, replacing inefficient and unreliable generators. The invention lead to such luxuries as power windows, power seats, and, eventually, air-conditioning.


Lear also continued inventing. He holds more than 150 patents. Remember eight-track tape players? Lear invented that.

But what he's really famous for are his contributions to the field of aviation. He invented radio direction finders for planes, aided in the invention of the autopilot,
designed the first fully automatic aircraft landing system, and in 1963 introduced his most famous invention of all, the Lear Jet, the world's first mass-produced, affordable business jet.
(Not bad for a guy who dropped out of school after the eighth grade.)
 

Blumlein 88

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Earl Muntz had an endless loop 4 track AutoStereo player for cars. I saw one once in an early El Camino. His version didn't switch tracks during songs. Lear used them in his jets, but developed the 8 track which he let big automakers help push for cars. Ironically the first 8 track I ever saw was a Lear 8 track player on an early El Camino.
 

Zapper

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The part of the old tube radios that I find most interesting is the vibrator power supply - a type of electo-mechanical switched mode power supply used to generate the high voltage needed for the tubes from the 6V or 12V car battery voltage. Apart from the EMI mitigation and the power supply, a car radio is just a radio.
index.php

The schematic above show a push-pull driver with a full-wave tube rectifier. A chattering relay vibrator device did the switching.

Synchronous rectification was even used:
Screenshot_20230722_123407_Brave.jpg

In this circuit the full wave rectification is performed with a secondary set of contacts on the same armature as the primary contacts and switching at (approximately) the same time. (Although this circuit wouldn't last long without some snubbing on the contacts to supress contact arcing, such as the R1,R2,C2 in the first schematic.)

Reference: https://www.radioremembered.org/vpwrsup.htm
 

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fpitas

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The part of the old tube radios that I find most interesting is the vibrator power supply - a type of electo-mechanical switched mode power supply used to generate the high voltage needed for the tubes from the 6V or 12V car battery voltage. Apart from the EMI mitigation and the power supply, a car radio is just a radio.
index.php

The schematic above show a push-pull driver with a full-wave tube rectifier. A chattering relay vibrator device did the switching.

Synchronous rectification was even used:
View attachment 300779
In this circuit the full wave rectification is performed with a secondary set of contacts on the same armature as the primary contacts and switching at (approximately) the same time. (Although this circuit wouldn't last long without some snubbing on the contacts to supress contact arcing, such as the R1,R2,C2 in the first schematic.)

Reference: https://www.radioremembered.org/vpwrsup.htm
Switching power supply. And most people think switchers are modern.
 
OP
Sal1950

Sal1950

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The part of the old tube radios that I find most interesting is the vibrator power supply - a type of electo-mechanical switched mode power supply used to generate the high voltage needed for the tubes from the 6V or 12V car battery voltage.
Back in the day it was the first thing that failed.
I repaired many a radio for friends, etc by just replacing the vibrator.
They plugged in just like a tube and looked like the old fluorescent tube starters.
Many were easily accessible from just reaching under the dash to the rear of the radio.
rsz_ferrocarts.jpg



The part in the article I most enjoyed was learning the history of the company name Motorola.
 

fpitas

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I seem to recall that for a brief period of time you could get transistorized vibrator replacements.
 

fpitas

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Blumlein 88

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Many of the cars in the 1930's had the AM antenna mounted underneath the running board on the passenger side. Not exactly the best place for them.
 

fpitas

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Many of the cars in the 1930's had the AM antenna mounted underneath the running board on the passenger side. Not exactly the best place for them.
Modern whips are stainless. I bet that was expensive then.
 
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Sal1950

Sal1950

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Modern whips are stainless. I bet that was expensive then.
The price of stainless really has come down in recent times.
I bitch to our maintenance department when they use mild steel fasteners for outside apps.
Then they wonder why the awning blew off our pool's side cover in a light wind.
Mild steel and chlorinated pool water don't mix very well. :facepalm:
 

Blumlein 88

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The antenna was several loops of wire between steel brackets in those days. AM only then.
 

fpitas

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The antenna was several loops of wire between steel brackets in those days. AM only then.
Yeah, I'm old enough to remember how tough it was to push electronics to 108MHz :D
 

NoxMorbis

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So, is it just me, or is the takeaway from this story that even really dumb people can succeed?
 

fpitas

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Mart68

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My father bought a 2 year old Austin Maxi in 1977 that was the first car he had with a radio

For cassette we had to wait until 1986 when he got a new Rover 213

I think one time he let me have my choice of music, the rest of the time it was his, usually something like 'Band Of The Irish Guards Play The Classics.'

'When you have your own car then you can play your choice of music' etc

Did not know about the origins of the Motorola name, very interesting.
 

fpitas

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Something to consider: this was when electronics was still a novelty. Degrees didn't mean a lot.
 
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