January 1958 Radio-Electronics
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Electronics,
published 1930-1988. All copyrights hereby acknowledged.
"Rediscovery of FM Broadcasting"
could be a contemporary headline. The decline of broadcast radio has been a major
concern of station owners for well over a decade since Internet and satellite radio
has dominated the venue through which listeners access radio stations. Local broadcasters
have long aired syndicated programs that include national advertising, but the money
to pay for those segments came from revenue supplied largely by local companies.
FM broadcasting began commercially around 1945 in the familiar 88-108 MHz band
yielded by the military following World War II, and grew in number of stations
very rapidly in the first few years. Then, it began a decline for a few more years
until finally leveling off after about a decade. Even though FM had a clear advantage
(literally) over AM because of electrical noise immunity (car alternators, household
appliances, lightning, arcing power lines on wet days), and its license to broadcast
at night, is seems the public was not overly willing to shell out money for new
radios when their old radios sufficed. The broadcast radio industry sprang into
action in educating the public as to the advantages of FM, including none of the
aforementioned AM weaknesses as well as superior music quality and stereo channel
separation. It worked smashingly well (...a little British lingo). Today, broadcast
radio (and television for that matter) is again fighting to survive in the presence
of cable, satellite, Wi-Fi, Internet, and other alternative means. Ultimately, it
comes down to who can attract enough advertisers to pay the bills. This is an example
of is Capitalism at its finest. See also Mr. Lachenbruch's 1960 article entitled,
"FM Radio Finally Makes It."
Rediscovery of FM Broadcasting
By David Lachenbruch
Once almost down and out, FM is on the upswing again
This year, for the first time since the very early 1950's, you'll see FM radios
displayed by nearly all major manufacturers - and a greater assortment of imported
and minor-brand FM sets than ever before.
This spring or summer, you're likely to see the first AM-FM automobile radios
bearing the imprint of top U. S. car radio manufacturers.
Is it for real this time? Is FM going to catch on after 10 disappointing years?
It's still too early to tell. But this much is apparent - FM is experiencing
a very definite boost in popularity which seems sure to accelerate in 1958.
It's a small increase, but it shows up at both the broadcasting and the receiving
ends of the business. The downward trend in number of stations on the air and in
production of receiving sets has halted for the first time since early 1950. If
the signs of FM's health were plotted on a graph, 1956-57 would show up as the beginning
of a small upward bump (see Fig. 1). The new signs of FM life bear close watching
by everyone whose livelihood - or interest - is geared to radio.
Blaupunkt Kolon 3-way auto radio has FM, AM and longwave bands.
A Sick Industry
Ask almost any broadcaster and he'll tell you that FM is still a very sick industry,
a far cry from the virile newcomer who seemed destined to knock AM radio out of
the spectrum after World War II - until television came along.
The number of FM stations on the air began tapering from its peak of 730 late
in 1949, dwindling to 536 by early 1956. Then the casualties virtually stopped,
and the number of operating stations even increased slightly to 544 by September,
Then, last summer, the FCC's normally quiet FM section was stunned by a comparative
avalanche of applications for new stations. During a single 8-week period, the commission
received a total of 24 applications - an average of 3 a week, compared with fewer
than one a week in the same period the preceding year. Applications on file for
new stations now total about 50.
For the first time in years, the FCC has more applications than available channels
in some big cities - making it necessary to hold hearings among applicants for contested
In the New York City area, where 16 FM stations are operating or authorized,
there are 6 applications for the 2 vacant channels. In Los Angeles, where 17 are
on the air with 1 more ready to start, 5 applicants are vying for 2 remaining channels.
In Philadelphia, 7 are operating and there are 4 applicants for the 4 available
These cases are exceptions, of course. In most locations - even big cities like
Chicago - FM channels are going begging. But these illustrations are indications
of the broadcaster's current reappraisal of FM's possibilities.
Fig. 1 - FM stations on the air. Slight upturn began early
in 1957 along with sharp increase in applications.
Fig. 2 - FM receiver production by years, including TV sets
with continuous tuners which tune FM band. Without such sets, FM set production
would have dipped to about 878,000 in 1949, staying at about this level in 1950-51.
There were other signs of a renewed interest in FM in 1957. Westinghouse Broadcasting
Co. ended the repeater status of its FM outlets in Pittsburgh. Pa., and Portland,
Ore., programming them separately from their AM companions - with classical music
exclusively. Westinghouse also applied for a new FM station in Boston to replace
the one it took off the air 2 years ago, and ordered brand-new transmitting equipment
for its Cleveland FM outlet. Both of these will also be independently programmed
with serious music.
A few other large-network-affiliated outlets began programming their FM stations
independently from AM - Washington's WMAL is an example. And NBC applied for a new
FM station in Philadelphia as a companion for its AM and TV stations there, but
currently has no plans for separate FM programs.
Many FM-only stations, and independently programmed FM's, report a definite increase
in the amount of mail received from listeners - generally considered a reliable
indication of a pickup in audience size.
During the long years of FM's post-1949 famine, one question frequently asked
in the broadcasting industry has been: If FM is dead, why won't it lie down? Why
did considerably more than half of the peak 730 stations stay on the air, when official
FCC figures show only a handful of them making a profit from FM operations?
The National Association of Radio & Television Broadcasters, in a recent
questionnaire to FM broadcasters. asked each one to give its own reason. The most
recurrent answers were:
1. By duplicating AM programs on the FM transmitter, it costs virtually nothing
to stay on the air.
2. FM listeners are a loyal bunch and it would be poor public relations to turn
the station off.
3. FM gives daytime-only AM stations an opportunity to provide some nighttime
4. Duplicating programs on FM extends the coverage of low-powered AM stations.
5. Local sports events, carried on FM only, have a big following.
6. The possibility of future developments in the FM band makes it worth while
to keep a foot in the door.
It's impossible to estimate just how many FM dials are actually being twisted.
About 8,000,000 sets have been produced since FM started up after the war, but how
many have been scrapped or are standing idle, nobody knows.
There aren't even any current statistics on FM receiver production or sales.
The industry's record keeper, Electronic Industries Association (formerly RETMA),
stopped keeping track several years ago when manufacturers' interest in FM approached
the vanishing point.
Before EIA (or RETMA as it was then) stopped counting, it estimated 1,175,000
sets were produced in 1947, peaking to a high point of 1,600,000 in 1948 (see Fig.
2). Then came the drop, with annual output dipping to a little over half a million
by 1952. In subsequent years, production probably fell to about 200,000 annually,
reaching this lowest ebb in 1954.
A turning point came in 1955. That year, it's estimated that production of sets
and tuners increased to 275,000. The uptrend continued in 1956, with sales climbing
well over 400,000, and an educated guess would put 1957 sales somewhere above half
a million. Not a boom by any means - but a step up.
Hi-Fi and FM
What did it? All of the probable answers revolve around high fidelity and the
education of the American ear.
Though audio aficionados had been hooking up components for best possible musical
reproduction for years, their purchases of FM tuners (made by nearly 20 small manufacturers)
never comprised a numerically important factor for nationwide FM. But their enthusiasm
was so contagious that by 1955 it had spread to some important manufacturers, who
decided that hi fi might become a magic word for the mass market.
Telefunken Opus covers FM, AM and shortwave bands.
Pilot's FM-530, FM tuner.
RCA International receiver, European made, has FM, AM, 2 shortwave
The time was ripe. Phonograph records had attained a quality far beyond the ability
of the average phonograph to reproduce. The natural companion to hi-fi recordings
was hi-fi radio-FM.
But in 1956, the first big year for packaged hi fi, most of the 500,000 units
sold under the hi-fi label did not contain FM. The number doubled in 1956 and a
greater proportion of them had FM tuners. In 1957, it's estimated that some 1,700,000
packaged hi-fi units were sold. It's improbable that anywhere near half of them
had FM, but the proportion increased again.
Distributors in some cities now report that it's practically imposible to sell
packaged hi-fi unit without FM.
At least some of the credit for America's recently renewed interest in FM is
due the Germans. In Germany, where FM has virtually replaced AM because of the crowded
broadcast band, manufacturers with such jaw-breaking names as Grundig, Telefunken
and Blaupunkt began exporting their generally excellent FM-AM-SW sets to the U.
S. The Germans are believed to have sold as many as 50,000 here in 1956 and perhaps
75,000 in 1957. American manufacturers sat up and took notice.
More American Sets
During the long FM famine, only one major U. S. manufacturer - Zenith - continually
produced FM receivers in quantity. Late in 1954, just before the FM upturn began,
a small American manufacturer - Granco Products, Inc. - experimentally turned out
a $30 FM-only set with a circuit based on the design of its uhf TV converter. This
clicked, and Granco claims its sales of FM sets and tuners hit 100,000 in 1956,
and even more in 1957.
Other American manufacturers have decided to try again. For their 1958 lines
they have announced not only hi-fi sets which include FM tuners, but such items
as FM-AM clock radios and table models. Among those now offering or preparing to
offer FM sets are: Motorola (its first since 1952), Admiral (first since 1954),
RCA (which will import a specially made set from Germany), GE, Philco, Arvin, Columbia,
Magnavox, Stromberg-Carlson and Olympic. British radio manufacturers are also hoping
to crack the 1958 U. S. markets with their FM sets. At least one Japanese manufacturer
plans to export FM tuners to this country.
Also from Germany, along with German-made automobiles, came FM auto radios. Again,
U. S. manufacturers plan to follow suit. It's understood that both Motorola and
Philco have FM car radios on the drawing boards for introduction this spring or
Last summer, the FCC asked for the TV industry's comments on a proposal to facilitate
highway FM reception with standard buggy-whip auto antennas by permitting FM stations
to use vertical polarization in place of the traditional horizontal polarization.
Commenting on this proposal, some FM stations pointed out that the FCC rules already
permit circular or elliptical polarization which could produce the same effect without
any changes in the rules. (However, no station is currently using circular or elliptical
polarization). Other stations expressed the view that present transmissions can
be picked up satisfactorily by conventional auto radio antennas, that if there is
any reception problem at all, it will be in areas far distant from FM stations.
All of these signs point to a definite increase in public awareness of FM. But
FM station operators have their eyes on another development which they hope will
permit them to keep serving a small and loyal public audience, and make money too.
This is multiplexing (see "Multiplexing and You," Radio-Electronics, October,
1957) - now permitted by the FCC on a regular basis. The commission has more than
50 applications by existing FM stations who want to begin this service, and a number
of them have already started.
Stations plan many ingenious uses for the multiplexing technique. Among them
are background music for stores, factories and offices; specialized programs beamed
to schools; special home-study courses, etc.- all to be offered simultaneously with,
and in addition to, regular FM broadcasts.
Equipment has already been developed for binaural radio using a single FM channel.
Some day soon, multiplex FM receivers may well be a companion to binaural tape players
in the home.
Which way FM? The signs of renewed activity in the 8-108-mc band are not of boom
proportions. But there is more hope today than at any time since 1949 that this
superior form of radio finally will take its well deserved place under the audio
Posted May 14, 2019(original