The opening paragraph of this
installment of Mac's Radio Service Shop includes a reference to someone
named Dr. Kildare.
As the article appeared in a 1954 issue of Radio & Television News
magazine, you are excused for likely not being familiar with the good doctor. I
remember Dr. Kildare (a fictional character) as a
Prime Time TV show that aired
in the 1960s, but his legacy goes back to the 1930s in movies and radio. Back to
the story line, though. Mac is wearing a newfangled type of headphone that must
have looked like a stethoscope, and that triggered Barney's comment. However, as
is often the case, the subject quickly changes to advertising techniques where Mac
explains his philosophy of honesty being the best policy. Along with such probity
must be an effort to convince potential customers that preventative maintenance
is a sign of responsible ownership. Just as you would take your car in for a relatively
low cost annual checkup to hopefully avoid a major bill later, TVs, radios, tape
recorders, and phonographs should also be brought into the shop for a good going
over. If you didn't know who Dr. Kildare was, then you probably never owned
a piece of electronic equipment with parts that wear out - like vacuum tubes, paper
capacitors, and dial cords - and therefore would never have had cause to be
concerned about such maintenance.
Mac's Radio Service Shop: Service Shop Advertising
By John T. Frye
Barney, late as usual after his lunch hour, came charging into the service department
only to be brought up short by the sight of Mac, his boss, wearing something that
looked like a doctor's stethoscope. The gadget was plugged into a tape recorder;
and the service shop owner, unaware he was being observed, was keeping time to the
rhythm on the silently moving tape with a waving forefinger.
"Well, well! If it isn't Old Doctor Kildare himself!" Barney shouted gleefully
at the nape of Mac's neck, delighted at catching his employer off guard. "What's
your prognosis, Doctor?"
Rather sheepishly Mac removed the apparatus from his ears, shut off the recorder,
and turned on his assistant with a fierce scowl. "My prognosis," he announced menacingly,
"is that if a certain red-headed Irishman does not knock off his practice of sneaking
up behind people and yelling at them, he is not long for this world."
"What you got?" Barney wanted to know.
"It's a new idea in low impedance earphones. See this little housing on the back
end of the phone plug?" Mac asked as he touched an object about the size of a small
hickory nut sticking out of the "External Speaker" jack of the recorder. "Inside
is a midget 3/4" inch, six-ohm speaker. The output of this speaker goes through
this flexible plastic tube to a 'Y' beneath the chin, and from there anodized aluminum
tone arms carry the sound to both ears. The whole thing only weighs an ounce and
"What's the good of it?"
"Well, for one thing, it can be plugged directly into the external speaker jack
of any tape recorder for personal listening. That's handy when you want to listen
to a tape privately or when you want to crank up the playback level for listening
to a high-fidelity recording without disturbing others. Also it looks like a good
unit to use when people want earphones connected to a radio. This will allow us
to make a quick, easy, and safe installation. By employing a miniature closed-circuit
jack, the secondary of the output transformer can be hooked across the phones when
the plug is inserted, and returned to the set speaker voice coil when the plug is
removed. Since there is no metallic connection between the earphones proper and
the plug, there will be no danger of the wearer being shocked, even when the
phones are connected to an a.c.-d.c. set.
"How's the quality?"
"The manufacturer advertises 'response from 50 to 8000 cps or better.' That does
not say, of course, within what dB limits this response is had. However, take a
listen yourself to this. recording of the 'Studies in Percussion' track by Hal Reeves
that I took off Capitol's "Full Dimensional Sound" test record. Keep an ear cocked
especially for the triangle, the tambourine, and the bass drum."
Barney adjusted the tips of the tone arms in his ears and listened carefully
for two to three minutes. Then he cut off the recorder and announced importantly,
"I may not have a golden ear, but those phones sound good to me. That tambourine
seemed as though it were being shaken right in front of my face, and I could almost
see the bass drum's stretched hide quiver as it gave that last 'whump.'''
"Not to change the subject," Mac remarked as he put the cover back on the recorder,
"but never think I failed to notice you were late getting back from lunch again.
What was it this time? Did you get held up with flying saucer traffic, or was it
really something unusual?"
"Nope; the drugstore was just full of high school kids, and I couldn't get waited
on. While sitting there, though, I really saw a demonstration of the power of advertising.
Remember a while back when you couldn't turn on your radio or TV set without having
a guy on it tell you all about lanolin and sheep's wool and his particular brand
of hair dressing? Well, one of those high school hot shots came in and told the
druggist he wanted something for his hair. The druggist asked what brand he wanted,
and the kid just went 'Ba-a-a-a-a' like a sheep. Without saying another word the
druggist reached up and pulled down the kind of hair dressing that bird on radio
and TV was plugging. His message certainly must have got across!"
Mac chuckled at Barney's graphic description of the drug store scene as he said,
"I'm glad you brought up the subject of advertising, for it's something I've been
thinking about lately. If you're not in too great a hurry to get back to work, we
might talk it over a little."
"I'll try to restrain myself," Barney murmured languidly as he collapsed on one
end of the service bench.
"A fellow moved into our neighborhood recently," Mac explained, "and when he
found I ran a service shop, he jumped on me all spraddled out. He says TV service
advertising is strictly for the birds, and that it makes no consistent sense. To
prove his point. he pointed out several ads in a metropolitan newspaper. One shop
harped on the expensive equipment and the advanced technical knowledge needed to
do modern TV service work. On the next page another shop boasted that practically
all service work could be performed right in the customer's home in a very short
"This guy then went ahead to say that twice he had had to call a service technician
to repair his set. In each case the call was answered by a young kid who, as he
put it, 'didn't look as though he were dry behind the ears yet.' This boy came in
carrying a small tool box, about two dozen tubes, and a single meter - probably
a v.t.v.m. In both cases he looked in the back of the set, noted a burned out tube,
replaced it, and was on his way. Where was the 'expensive equipment?' this fellow
wanted to know. As for 'advanced technical knowledge,' it required about as much
of that as would be needed to find out which bulb was burned out in a floor lamp.
According to the way my neighbor looks at it, that business about expensive and
delicate instruments being needed to do TV work is a lot of hooey. So is the talk
about technical knowledge. The fact that most TV repairs can be made right in the
home by a man who has not been shaving too long, using only a v.t.v.m., proves to
him he is right."
"He has built up quite a case," Barney observed.
"On the surface, yes; but it has a lot of holes in it. As I told him, you do
not need to have a long gray beard to be a TV expert because television itself,
as we know it, is hardly ten years old. Youth, with its eagerness to learn about
new things, is a natural for this brand-new field. Probably the age of the youngster
who fixed the set would be about the same as that of the men who are designing,
testing, and flying our modern jets; and the Air Force seems satisfied with the
job they are doing.
"I also pointed out that when he called for service he was doubtless asked about
the make, model, and symptoms of his receiver. Using this information, the technician
called upon his technical knowledge and his rich fund of experience and probably
made a very shrewd guess as to the likely cause of the trouble before he hung up
the telephone. Then he consulted his service library, in which he would have. invested
a minimum of $400, to determine exactly what tubes he would need to take along for
that particular job. Finally, from his array of service instruments, in which he
would have invested from $1000 upwards, he selected the one best suited to determine
whether or not the set could be repaired in the home if his original guess as to
the cause of trouble proved wrong."
"The knowledge and equipment that a set owner sees displayed when a technician
makes a home call is only a very small per-cent of that at his disposal," Barney
threw in. "It's kind of like an iceberg that has nine-tenths of its bulk hidden
below the surface supporting the one-tenth that is in plain view."
"Exactly," Mac agreed. "At the same time I must admit my neighbor has a point
in there being inconsistency in service shop advertising. When one shop talks about
the expensive equipment and extensive technical knowledge needed to perform service
work and another stresses how quickly and easily it can be done right in the customer's
home, this is confusing to say the least.
"The inconsistency lies in the fact that two different types of service operation
are being described. Abrupt set failures are usually produced by faults that can
be quickly detected and corrected by a skilled technician right in the home. On
the other hand, all television sets are subject to a gradual deterioration in performance
as the months go by. Tubes lose a bit of their emission; condensers develop slight
leakage; resistors change value; dirt accumulates on the tube face and on the selector
contacts; circuits drift out of alignment. The total effect of these defects is
arrived at so gradually that quite often the owner fails to notice how much his
reception has suffered. The only way in which the receiver can be restored to the
kind of operation it had when it was new is for the receiver to be checked over
completely, using expensive and delicate instruments that cannot be lugged around
in a service truck. In other words, a receiver cannot practically be kept in first-class
working condition unless it makes periodic visits to a service shop."
Mac paused for a moment and then went on. "What I am going to try to do in our
advertising is to persuade our customers that this is so. To get the point across,
I'm going to resort to analogy. For example, to reach the women customers, I plan
to say something like, 'If you are a good housewife, you sweep and dust every day;
yet you still give your home a general housecleaning at least once a year. Your
TV set needs a complete going over once a year, too.' For the men I propose something
like this: 'If a fan belt breaks, you stop in a filling station for a new one and
are on your way; but every so often you leave your car at a garage for a complete
check. Your TV set deserves a careful annual inspection also.' Then I'll go ahead
to urge our customers to let us have their sets while they are on vacation. This,
of course, will help fill in our slack summer season; but more important, it will
give us plenty of time to go over each set completely, locating and correcting every
defect, and to bench-test it thoroughly - something we can't do when the customer
is yelling for it back every hour on the hour."
"Are you going to say this will prevent the customer's having set failures during
the rest of the year?"
"No, because no one can honestly promise that. A tube heater can open up or a
condenser pop at any time. Certainly the likelihood of failure will be lessened
by these annual checks, but the principal advantage to the customer will lie in
the fact that his set will be operating in tip-top shape. If a particular part fails,
it can be replaced with confidence that this will be all that is needed to restore
the set to perfect operation. We cannot guarantee uninterrupted reception with these
annual checks, but we certainly will be able to promise good reception; and you
know as well as I how many sets we see that produce some kind of a picture and some
sort of sound but are a long, long way from providing the kind of reception they
were designed to give."
Barney heaved a big sigh and slid off the bench. "And I was just looking forward
to a nice long slow-business summer," he murmured.
"My deepest sympathy," grinned Mac. "You certainly are the most abused service
shop assistant that ever soldered a lead!"
Posted April 2, 2021
Mac's Radio Service Shop Episodes on RF Cafe
This series of instructive stories was the brainchild of none other than John T.
Frye, creator of the Carl and Jerry series that ran in
Popular Electronics for many years. Mac's Radio Service Shop began life
in Radio & Television News
magazine (which itself started as simply Radio News), and then changed
its name to Mac's Service Shop after the magazine became
World. "Mac" is electronics repair shop owner Mac McGregor, and Barney
Jameson his his eager, if not somewhat naive, technician assistant. "Lessons" are
taught in story format with dialogs between Mac and Barney.