Popular_Electronics 1958-05.pdf

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-67-3
Technicians
the
will
run
train
now
for
your
future
in
the
U.S.
AIR
FORCE
As
a
man of
mechanical ability,
you have
a
bright future.
For
in
the
new Age
of
Space,
it
is
the technician trained
in
rocketry,
jet propulsion, electronics,
or allied
fields,
who
will
be
the
important, sought
-after
man.
And,
remember, nowhere
else can you
get
so
broad and
complete
a
training
for
these
Space
Age
specialties than
as an
Airman
in
the
U.S.
Air
Force.
See
your
Air
Force
Recruiter today
-or
mail coupon.
The
future
belongs to
the Airman
You'll
go
places
faster
in
the
U.
n
PASTE COUPON
ON
POSTCARD AND
MAIL
TO:
Airman Information,
Dept.
PE
6321
Box 7608,
Washington
4, D.
C.
Please send me
information
on
my
opportunities
in
the
U.S.
Air
Force.
am
between the
ages
of
17
-34
and
reside
in
U.S.A. or
possessions.
I
AIR
FORCE
Name
Address
City
Zone
State
Just
2
settings
on
the
NEW
Co2eI
FAST
-CHECK TUBE
TESTER
tests
over 600 tube types
completely, accurately
...AND
IN
SECONDS!
NO
MULTIPLE
SWITCHING
NO
ROLL
CHART
CHECKING
CANNOT
BECOME
OBSOLETE
Engineered
to
accommcdote
all
future
new tube listings
fur-
tube
types
nished
periodically.
...
The FAST -CHECK
enables you to
save
valuable
time
SIZE:
143/8"
and
eliminate unprofitable call
backs. You earn
extra
money and win confidence by showing your
customer the
actual condition
and
life
expectancy
of the tube
on
the large meter
scale
of the
FC-2. The
extra
tubes you
w
11
sell each
city
will
pay
for
the
FAST -CHECK
in
a
very short time.
N:
111/4"
D:
N/e"
WIDE RANGE
OF
OPERATION
more
than
Checks
quality
of
over
600
tube types
all
TV
and
radio
tubes,
including
the newest
99% of
series
-string
TV
tubes,
auto
12
plate -volt
tubes,
OZ4s,
magic
eye
tubes and gas
regulators.
Checks
inter -element
shorts and leakage.
Checks
for
gas
content.
Checks
NEW`
Special
compartment
to accommo-
date
line
cord
and
CRT
Test
Adapter
cable
...
TRY
THE
FC-2
BEFORE
Shipped
on
approval for
FREE
10
day
trial
No
obligation
to
buy
YOU
BUY IT!
for
life
expectancy.
Pay
in
small monthly payments at
net
cash
prices...
no
financing
charges
GUARANTEED
FOR
ONE
CRT
adapter,
tube
listings
....... ........
only
Net FULL
YEAR
This
extremely
low
price
s
made possible
only
because
case
complete
MODEL
FC
EASY
TO
BUY
IF
YOU'RE
SATISFIED!
-2-
housed
with
O
IMPORTANT
FEATURES
/
Checks each section
of multi
-section tubes
and
even
if
only
one section
is
defective the tube
will
read
"Bad"
,/
41
long
lasting phosphor-bronze tube
sockets accom-
modate
all
present and
future
tube types
-cannot
become
obsolete
t/
Less
than
10
seconds
required
to test
any tube
,/
Large
D'Arsonval
type meter
is
extremely
sensitive
yet
rugged
-is
fully
protected against accidental burn -out
,/
Line
isolated
t/
7-pin and
9
-pin straighteners
con-
veniently
mounted
on
panel
,/
Quick reference tube chart
lists over 600 tube types
I/
Line
voltage
compensation
NEW
A
specially
designed
PICTURE TUBE ADAPTER
cable
is
making it
a
highly efficient
CRT
Tester
-
now
part of the
FC
-2
Rejuvenator.
This
feature eliminates
the
need
of carrying
extra
instruments and
makes
the
FC
-2
truly
an
all-
around tube tester.
The
adapter enables
you to check
all
picture
tubes
(including
the
new short -neck 110 degree
picture
tubes)
for
cathode emission,
also to
rejuvenate
and restore
shorts and
life
expectancy
cathode emission
of
weak
picture tubes.
it
rugged oak carrying
It
almost gat the
cost
of
the
Fast-Check
with
the
extra
money
I've
made, and
it's
SERVICEMEN` are
only
2
weeks"
. .
.
"It's
easier to
use
SAYING IIBEUT
wouldn't
ever
want to
than you
said"
.
THE
FC
-2
use
it
in the shop and take
it
be
without
it"
. .
*Names
on request
along
on every
call."
WHAT
YOU
ARE
BUYING
DIRECT
FROM
THE
MANUFACTURER
"I've
"You've really
made
tube testing
a
snap"
...
off
paid
...
MAIL COUPON
NOW
MONEY
RE-
-NO
CENTURY
ELECTRONICS
CO
-I
"I
"I
M
MN
la
I
-
-t
-
ti
Name
Address
....
NMI
INC
ti
to
to
"'
1
Roosevelt Avenue
MIN
-
IM
Dept. 335,
Mineola,
N.Y.I
QUIRED 'WITH
am
not
completely
Please rush the new
Model
FC
-2 FAST -CHECK
TUBE TESTER
for
a 10
day
trial
period.
If
satisfied
I
will
return the instrument
within
10 days
without further obligation. If
fully
satisfied
I
agree to pay
the down payment
within
10
days and
the monthly installments
as
shown. No
financing
charges
are to
be
added. Should
I
fail
to make payment when due, the
unpaid balance shall
become due end
payable at
ORDER...
ABSOLUTELY
III
NO
RISK
ON
YOUR
PART
...I
.
BUDGET
TERMS: Pay
$14.50
within
10
days
after
receipt of instrument.
Bal-
ance
$11.00 monthly for
5
months,
pis
shipping
charges.
PREPAID
TERMS: Enclose
$69.50 with
coupon
as
payment in
full
and Century
will
pay
all
shipping
costs.
10
day money
-back guarantee.
POPULAR ELECTRONICS
is
Published
monthly
by
Ziff
-Davis
Publishing
Company.
William
B.
Ziff.
Chairman of the gimp]
1f41t-
IiiUt'.i,
at
lid
1i.
Ente si
ClAcago
1,
ill.
1.tereri
as
nd
class
matter August
27. 1954 at the Post
Office.
Chia
t;'+.
Illiu
Authorized l,y
Post
l tiMMM,-
De,i't't.men
t.
Ottawa.
Canada.
as
nd
class
matter.
SUBSCRIPTION RATES:
One
year
I'.S.
ana
P!c
=ea-
a:uun,
und
l:anada
$4.00:
Patt-Antericau Union
counlrien $4.30,
all oilier forci
-nt
cuuutrien
$31.00.
.
-
--
-
iliElm
^I
M-_
---MN
is
City
State
is.
3
POPULAR
MAY
Publisher
& EdiFar
OLIVER
READ,
W
1
ETI
1958
ELECTRONICS
VOLUME
8
NUMBER
5
Managing
Cditor
VIN
ZELUFF,
W2HSU
Technical Editor
LARRY
KLEIN
Associate Editors
CONTENTS
FEATURE
Articles
and Electronic
Developments
MIKE BIENSTOCK
MARGARET
MAGNA
Finding
Your Way
in SPACE
How
to
Make
Parts
Substitutions
(Part
Tubes
Control
Car
The
Truth Detector
2-
capacitors)
Brooks
Currey,
Jr.
33
41
Contributing
Editors
H.
BENNETT
L.
E.
GARNER,
Jr.
H.
S. BRIER
H. POLLACK
J.
T. FRYE
R. P.
TURNER
West
Coast
Editor
EDWARD
A.
ALTSHULER
Art Editor
ALFONS
J. REICH
Eugene Richardson
Budd
E.
Gonder
55
56
Oscilloscope
Traces-
Ignition
Systems
The
Art
of
Tape
Correspondence
Carl Kohler
Howard
Burgess
Carole
F.
Hoover
57
69
ELECTRONIC
Build -It-
Yourself
Projects
Art
and
Drafting
Dept.
J. A. ROTH
W.
K.
VAHLSING
M.
WHELPLEY
Advertising Director
Check Your
Marksmanship
with
Bullets of
Light.
R.
L.
Winklepleck
Build
a
"Half-
Pack"
Francis
J.
Leyva
Trick Tones
from
A.F.
Oscillators
Frank
H.
Tooker
Single -Stick
Antenna
Saves Space
William
I.
Orr
Card File
Transmitter
Donald
A.
Smith
37
47
50
60
JOHN A. RONAN,
JR.
Advertising
Manager
WILLIAM
G. McROY
77
,sf
D,(f,,J
AUDIO
and
Make Your
Own
Disc
Records
Where fo
Hi -Fi
How
to
Install
a
P.A. System
Make Your
Own Arm
Notch Your
Hi
-Fi
Hi -EI
Features
E
William
B.
Ziff
Chairman of
the
Board
c
s
Eugene Garnes
43
51
1946-1953
ZIFF
-DAVIS
.?t
NG
z
ce
One
Jeff
Markell
Louis
E.
Garner,
Jr.
Leonard
C.
Holzer
R
Wayne
Crawford
63
73
82
PUBLISHING
CO.,
Experimenter's Workshop
Protect the Short -Wave
"Two-
Lunger"
Variable
A.C. Power
for
Your Workshop
Make
a
"Cat- Whisker"
Crystal Detector
Poor
Man's
Theremin
for
the
Musically
Minded
New York 16,
N. Y.
William Ziff,
President;
H. J.
Morganroth,
Vice President;
W. Bradford
Briggs, Vice
President; Michael
H.
Froelich, Vice Presi-
dent; Michael Michaelson,Vice
President
and
Circulation Director; Victor
C.
Sta-
bile, Treasurer;
Albert
Gruen,
Art
Di-
rector.
Park
rustt
Ave.,
Donald
Stoner
Paul
Harvey
Art Trauffer
L.
R
68
68
84
84
GBC
Member
Audit
Bureau
of Circulations
Zarr
ti
IN
i.'
Miscellaneous
Electronic
News
64
All
-in -One
Flash
"Hearing"
Aid
Tiny Talky
U.H.F.
Converter
For
SWL's
and Hams
Lightweight
Direction Finder
Sentry
Guards
Utility
Lines
Space
Speedometer
Take Me to Your Leader'
(Also
see
page 6
for DEPARTMENTS)
Cover photo by
Joe
Petrovec
40
40
40
40
54
54
54
advertising manager;
Western Office,
Room
412,
215 W. 7th
St.,
Los
Angeles
17,
Calif.,
John
E.
Payne,
manager.
SUBSCRIPTION SERVICE
BRANCH OFFICES:
Midwestern Office,
E.
Lake St.,
Chicago,
III.;
Jim
Weakley,
All
communications concerning
sub-
scriptions
should
be
addressed to
Cir-
culation Dept., 64
E.
Lake
St., Chicago
1, III.
Include your
old address
as
well
as
new-enclosing if
possible
an
address label
from
a
recent
issue of
this
magazine.
Allow
at
least
4
weeks
for
change of address.
CONTRIBUTORS:
54
59
Copyright
O
1958
by
Ziff-Davis
Publishing
Company.
All rights
reserved.
.,er,9e
Net
Paid Circulation
267,9Sg
4
Contributors
are
advised to
retain
a
copy
of
their
manuscripts
and
illustra-
tions. Contributions should
be
mailed
to the
New
York
Editorial
Office and
must
be
accompanied
by
return
post-
age.
Contributions
will
be
handled
with
reasonable
care,
but
this
magazine
as.
sumes no
responsibility
for
their
safety.
Any
copy accepted
is
subject to what-
ever adaptations
and
revisions
are nee.
essary to meet the
requirements of
this
publication.
Payment covers
all
au-
thor's, contributor's
and
contestant's
rights,
titles,
and
interest
in
and
to
the
material
accepted and
will
be
made
at our
current
rates upon acceptance.
All
photos
and
drawings
will
be
con-
-
idered
as
par!
of
material
a
--
POPULAR ELECTRONICS
/
t
These
men
are
getting
practical training
in
ELECTRONICS
ON
REAL
A.C. and
D.C.
Motors
Generators
Switchboards
Controllers
Appliances
Electronic Units
Prepare
for a
better
job and
a
real
future in TOP
OPPORTUNIY
FIELDS.
Train
on real full-size
equipment
at
COYNE
where
thousands
of successful men
have
trained
for
nearly
60
years-
largest,
oldest, best
equipped
school
of its
kind
-eat.
1899.
Trained instructors
show you how,
then
do
practical jobs
yourself.
No previous experience or
advanced education
needed.
Employment
Service to
Graduates.
in Chicago
START
NOW
-PAY
LATER
COYNE
-
-
Train
in
Great
Shops
of
Liberal
Finance and
Pay-
ment
Plana.
Part
-time employment help for
students.
GET
FREE
BOOK
-"Guide
to Careers
in
ELECTRICITY
-ELECTRONICS
and TELEVISION- RADIO "
-no
obligation;
no
salesmen
will call.
Vets
and Non
-Vets
get
vital facts
now.
Coyne Electrical School
S00
So.
realm
Street
Chartered Not
For
Profit Chicago
12,
Dept. S8-2C
COLOR -TV
ON
REAL
Television
Receivers
COYNE ELECTRICAL
SCHOOL
500
Including
Color TV
AM and
FM
Radios
Auto
Radios
Test Equipment
S.
Paulina St., Chicago 12,
111.,
Dept.
58 -2C
Send
BIG
FREE
book and details
of
your training
offer
by return mail.
I
am
interested
In:
Ele-tricity-
Electronics
Te'erision -Radio
Name
Address
City
State
You
CAN
BE
DOING
KW
WORE
INTEREgQUICpNO
PROFITABLE
LIKE
TNIS
The
future
is
YOURS in TELEVISION!
A
fabulous
field
-good
pay-
fascinating
work
-a
serri
ecuirorz
104
e)/zee
Booh
and
full
details,
including
easy
Payment
Plan.
No
obligation,
no
salesman
will
call.
eLev,aw,t
prosperous future
in
a
good
job, or independence
in
your
own
business!
Coyne brings you
MODERN-QUALITY
Television Home
Train
-
ing;
training
designed
to meet Coyne
standards
at
truly
lowest cost
you
pay
for
training
only
-no
costly
"put
together
kits."
Not
an
old
Rad.o
Course with Television
"tacked on."
Here
is
MODERN
TELEVISION
TRAINING
including
Radio,
UHF
and
Color
TV.
No Radio background or previous experience
needed.
Personal
guidance by Coyne
Staff.
Practical Job Guides
to
show you how
to
do
actual
servicing jobs
-make
money
early
in
course.
Free
Life-
time Employment
Service
to Graduates.
-
a
r#
.
CO
sMer'
COYNE
Television
Dept.
58
-1I2
Send Free Book
and details
on how
I
can
get
Coyne
Quality Television Home Training at
low cost
and
easy
terms..
Name
Address
State
City
5
Home
Training Division
500
S.
Paulina St.,
Chicago
12,
III.
COYNE
A
TECHNICAL TRADE INSTITUTE
OPERATED
NOT
FOR
PROFIT
500
5h,
Paalina
St, set,
Chicago
12,
Dept.
58
-.12
S.W.
`euaa
Coyne
-the
Institution
behind this
train.
inp...
the
largest,
oldest,
beat
equipped
residentialsehoo
l
of its kind.
Founded1899.
LA,,y,
195R

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