Radio Shack SSM-1750 User Manual download pdf (Page 6)

Power

the Product!

Low cost

B &K PRECISION

power

supplies

with high cost

features

Model

1630 (3

amp)

$225

Model

1610 (1

amp) $150

Now you

can

have

the power

you

need,

wherever

you

need

it,

a surprisingly

low cost.

These

new

B &K-

PRECISION

power

sources

each

give

you

control

volts

DC with

fully

adjustable

current

limiting. Other

features

include:

Excellent

regulation

and

low-

ripple

characteristics

Dual

meters

monitor

voltage

and

current

simultaneously

Two

current

ranges

Fine

and

coarse

voltage

controls

Isolated

output

Protected

against

reverse

polarity

external

voltages

Two

identical

supplies

can

connected

in series

parallel

Can

used

as a

constant

voltage

constant

current

source

Compare

prices,

features

and perfor-

mance,

and you'll

agree

that

the

1610 and

1630 power

supplies

are

revolutionary.

Available

for

immediate

delivery

your

local B &K-

PRECISION

distributor.

For

additional

information

the

name

your

local

distributor

contact

B &K-

PRECISION.

ip*KPRECISION

DYNASCAN

CORPORATION

6460 West

Cortland

Street

Chicago,

Illinois 60635.312/889

-9087

International Sales. 6460

W. Cortland

St.. Chicago.

60635

Canadian

Sales:

Alias Electronics.

Ontario

South

and Central

American

Sales,

Empire Exporters.

Plainview.

NY 11603

Pill/il//EDITORIAL

11111

Surging

Back

You

can't always count a product out

when it loses favor. For a brief time, ster-

hi -fi components seemed to have

lost

their appeal to some extent. In 1984,

for

example,

factory

sales dropped

some 28

percent

dollars.

We all heard that

video was usurping its steady growth

po-

sition,

that personal computers

had

cap-

tured everyone's

interest in its

place,

and

so on.

But

as soon

the compact

disc

and

player fired

consumer

interest, sepa-

rate

audio

component sales surged back.

Some electronic products

have

"died," resurged, and then

lost their ap-

peal

for

one

reason

another. CB

radio

an example. Others showed

enormous

promise, such

videodisc players, going

toe to toe

with

competing

systems -in

this

case,

videocassette recorders -only

lose

out

the sales

numbers game.

Will it have

another day?

Then there are

products that display cyclical

appeal,

such as personal computers.

These

ma-

chines

had

relatively bad year

in 1985,

though the

word

"relatively"

has to be

underscored

when

talking

about unit

sales that exceeded four

-million (down

about one -million

from the previous

year).

Cordless telephones

were "hot"

1983 and 1984, the latter year

peaking at

6.3- million units sold

to dealers.

Sales

dipped appreciably

million units

'85, though better designs

that used dual

frequencies and security

codes

were in-

troduced to spur sales.

So far, however,

they haven't

reached their previous pop-

ularity

level.

Audio tape recorders

are taking a back

seat to

CD players

the

hearts and

minds of people

nowadays. But looming

the

background, probably scheduled

for 1987 introduction,

digital

audio

tape (DAT),

which promises sound qual-

ity that approaches that of a

laser- gener-

ated CD disc system,

while adding

re-

cording capability.

So here's a product

that could, indeed, surge

back.

Will cheap computers

enjoy a

resurrec-

tion? With

low -cost IBM clones

abun-

dance today and a greater

awareness on

the part of the public concerning

what in-

expensive computers

can -and

can -

not-do,

it's

doubtful.

Even Commo-

dore

International,

which moved about

21/4 -million computers

last year,

facing

financial troubles.

Low -cost computers

declined by one -third

last

year

world -wide basis. Nevertheless, Com-

modore has introduced an upgraded

model C -64

with

a graphics

video

en-

vironment-

icons,

mouse,

pull

-down

menus

-to stem the

tide. Will this lead to

a resurgence? Time

will

tell.

Household penetration

is an indica-

tion, too, as to

how popular a product is

and

how much play there is in sales po-

tential. For home

computers,

15% pene-

tration is the estimate. So

it's

still a busi-

ness

/professional-

oriented

world for

computers.

Even VCRs, as popular as

they are and as low as their

selling prices

have become today,

were

only

in about

30% of U.S.

homes by the end of

1985.

At that juncture,

it's interesting to note

that 64.7% of

Modern Electronics

read-

ers owned

VCRs.

Sony

tried to bolster

Beta -format sales by

introducing hi -fi

stereo sound, only to be

matched by a

similar development by

VHS makers, so

a resurgence there

is unlikely. Now 8 -mm

and VHS -C camcorders are jockeying

for

position.

Will breadboarding of circuits

slide

away

due

to the

rising star, computer

aided design

(CAD)? More and more

professional design engineers now sit

front

of a computer

workstation

to de-

sign circuits

instead of going

to the

breadboard /solder

iron route, so

it's

possible. Prototypes

will

eventually

have

to be breadboarded, though.

On second

thought, this might be done directly

on a

board whose foil

pattern

was

gene-

rated

by computer.

It's rare to find a product that

lost

favor

bouncing back

unless some special

advance calls

for this to

happen. Ama-

teur radio,

for

example,

does not exhibit

growth

this country.

But if the Morse

Code

test requirement

was lifted, as it has

been in many other countries,

burgeon-

ing equipment sales

will

surely follow.

Meanwhile,

we'll

all

watch

the

moves

that manufacturers

make in enhancing

older technology

to capture our

imagina-

tion as

well as new technology that's

im-

plemented

way that induces us to up-

grade

whatever we

own.

CIRCLE

M ON FREE INFORMATION

CARD

4 / MODERN

ELECTRONICS

September

1986

Say

You

Saw

It In Modern

Electronics

1 2 3 4 5 6 7 8 9 10 11 ... 83 84

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Radio Shack SSM-1750 User Manual Page 6

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