HR 1980 09.pdf

SEPTEMBER 1980

L matching network

half-wave baluns

quads and quagis

pi-network design

TS-520-SE counter mixer

portables gives

the broadest cho~ce

at the lowest mice

7w-

* ichc only synthesized h,

watts

* The same dependabilit5

Circuitry that has been

more than a million hol~r.i o onvrarrr

S-7.

* Heavy duty battery pat".

* The S-5's excitinl

*With touch tone

SPECIFICATIONS

Frequenc Coverage 144 to 148 MHz

Channel lpaclng Rece~veevery 5

* External microphons carlr;rh;l;*

transmtt S~mple

SUPPUEO ACCESSORIES

Telesco Ing whlp antenn

la, ni-cad ba

ttery

r 600 kHz

Power Requirements 9 6 VDC

OPTIONAL ACCESSORIES

Current Dram

17 ma-standby

12 Button touch tone pad (not ~nstalled):

S39 16 Button louch tone pad (not

900 ma-transmll

~nstalled)$48 Tone burst enerator

Antenna Impedance 50 ohms

D~mens~ons

40 mm x 62 mm

529 95 CTCSS sub-audlble!one control

The first and most thoroughly field

170mm (16x

529 95 Rubber flex antenna 8 Leather

x67 1

charg~n unit $6 ~atc%ln & watt

11 hter lug mob~le

tested hand-held synthesized radio available. 1

- mmM (R ,h

17 oz

800 channels in the palm of your hand.

Better Ihan.5

$89 Matchlng 10 watt out~utoower

microvolts nominal for

Simple to operate. (You don't need a

20 db

arnpllf~er

(S80) 5149

degree in computer programming)

ACI ,

1 Heavy duty battery pack allows more

,st again. Thistime with a superior quality s)

3d 220 MHz hand

empo is fir

eld transct

iroughout

mthesizc

an use2:

eering.

U--- 4rV

operating time between charges.

wer With anS-2 Inyour car orpocketyouc

20 MHzrepeaters

1 External microphone capability

--- - - -a.

the U.S. It offers all the advanced engin

premium quality

urnponents and exclt~ng

features of the S-1. TheS-2 OIIWI~ 1uJ0channels Inan

1 The lo1

The S-

installc

west pric

1 T (Witl

~d)

ce ever..

i touch I

9.00

.$259.00

xtremely l~ghtwe~ght

but rugged case.

... $28'

tone pac

you're not on220 this IS the perfect way toget started. Withtheaddition of theS-

5 (25W output) or S-75 (75W output) Tempo solid state amplifier it becomes a

owerful moblle or base statton If you have a 220 MHz ng, the S-2 w~lladd

b versat~lityIts low price includ

emendous

eavy duty

r~ce

es anexter

lnd telescc

Wit

)hone cap1

I antenna.

Ine pad...$(

abil~ty,

helds ..." bi name' qualit at affordable rices. Th

... $349

a- '

nl-cad battery pack, charger, 8

IH-12 6 FMH-!S o erate in t& 135 to 174 MR~

.oo

399.00

-~r: a!:

. .

range

e FMH-40 & FMH& In the 440 to 480 MHz rgnnn

't~ R, UHF SOLID STAY

loost your signal. .. give It the range and clarity of a high powered base

. .

'""$,".

provide

s and featu

eiver ...a

mpo also offers the FMT-2 & FMT-42. They

tatlon. VHF (135 to 175 MHz)

cellent VHF or UHF mobile communicattonl

Dr~ve Power

Output

Model NO

Pr~ce

mote control head for h~de-awaymounttng

130W

130A02

$209

so available is the su erb MU-3 pocket reci

1OW

130W

130A10

$189

niature. 2 channel Y& high band monitor UI p.yuy

1111

re1

Plc

frc

30W

130w

130~30

celver

now

80~02

?ase call or write for complete information. Also avai

lable

I ow

BOW

BOA 10

30w

80~30

)m Tempo dealers throughout the U.S. and abroad.

BOW

50W

50A02

70A02

?OW

UHF (400 to 512 MHz) n

d FCC type aciepted modds

E OROER NUMBER: l~421-0631 also available.

Is except Cal~lornia

lants please call collect on our regular n~mbsrr

11240 W. Olymnic Blvd.. Lor Angeles. Calif. bww LIJI~I-orui

N. Euclid.

sr, Missou

Anaheim.

ri 64730

Callf. 928(

011tput. (Switchable for 1 or .J wart orJerdttt

pack, clarger

holster S16 C~garetle

output Q3 8 VCD ower ampl~!er (S30)

lw available is the expanded line of Tempo commerci

~nd

IT'S ONLY ASTROmLOGICAL ...

Dual PTO's, 235 Watts PEP & CW HF SSB Transceiver Featuring "VRSTM"

on all Frequencies, IF Passband a Knob with a New Twist, and Over 100,000

Tuning, with LED Position Fully Microprocessor-Controlled

Indicators and Full Break-In Frequencies on Present or Envisioned

"Ham" Bands.

There's a new name on two popular Amateur transceivers. CUBIC COMMUNICA-

TIONS replaces SWAN on the front panel of both the ASTRO 102BXA and the ASTRO

150A. Swan Electronics actually has been part of the Cubic Corporation for years. With

Cubic being a large, highly diversified, multi-million-dollar company, known and re-

spected worldwide, this change seemed only logical.

The same people will be making these radios in the very same factory. You're as-

sured of continued superb performance. Performance that has made both ASTRO

models outstanding choices for today's demanding Amateur.

Prices remain unchanged. However, the ASTRO 102BXA will be supplied less the

old, marginal, CWN crystal filter. A superior, 400 Hz, Spole CWN filter, to operate with

the passband tuning, is optional, priced at $82.50 list.

Shipment of the new CUBIC COMMUNICATIONS ASTRO transceiver line has al-

ready begun.

It's time to start thinking of AMERICAN PRODUCTS for AMERICAN HAMS. If

we're to remain the strong and proud America we all love and respect, we've got to

start looking for ways to keep our hard-earneddollars at home.

MADISON ELECTRONIC SUPPLY, INC., is proud to lead the way in the 1980s with

these two fine examples of AMERICAN technology.

ACCESSORIES AVAILABLE

SEND FOR COMPLETE BROCHURE

CALL FOR QUOTES

Electronics Supply, Inc.

1508 McKinney Houston, Texas 77002 7131658-0268

THE CHANGE FROM SWAN TO CUBIC!

NEW

GRAADMRSTER

MFJ INTRODUCES THE

MEMORY KEYERS

I At $139.95 this MFJ-484 GRANDMASTER I

memory keyer gives you more features per dollar than any other

memory keyer available - and Here's Why . . .

WEIGHT CONTROL TO PENETRATE

MESSAGE BU?TONS SELECT DESIRED 25 CHARACTER MESSAGES.

ORM PULL TO COMBINE MEMORI

RESETS MEMORY IN

A ANDBFOR 1, 2, OR

USE TO BEGINNING.

CHARACTER MESSAGES.

MEMORY SELECT: WSI-

TlONS 1. 2. 3 ARE EACH

SPEED CONTROL. 8 TO

SPLIT INTO MEMORY SEC.

50 WPM PULL TO

TWELVE 25 CHARACTER

MESSAGES). SWITCH COM.

BlNES A AND B POSmON

K GIVES YOU 100. 75. 50.

LEOS (4) SHOW GICH TONE C~TROL. VOLUME

OELAY REPEAT CONTROL CEO INDICATES

CON-

OR 25 CHARACTERS BY

MEMORY IS IN USE AND

PULL TO TUNE.

TROL. POWER

(0 TO 2 MINUTES) PULL

DELAY REPEAT

PRESSING BUllONS A. B.

WHEN IT ENDS.

ON OFF.

FOR AUTO REPEAT.

MODE.

C. OR 0.

NOW YOU CAN CALL CQ, SEN0 YOUR QTH,

Instan@ insert or make changes in any

control. 8 to 50 WPM.

NAME. ETC., ALL AUTOMATICALLY.

playing message by simply sending. Continue

Wclght mntml lets you adjust dot-dash.

And only MFJ offers you the MFJ.484

by touching another button.

space ratio; makes your signal distinctive to

Grandmaster memory keyer with this much

Memory resets to beginning with button. or

penetrate ORM.

flexability at this price.

by tapping paddle when playing. Touching

Tone control. Room filling volume. Speaker.

Up to twelve 25 character messages plus

message button restarts message.

Tune function keys transmitter for tuning.

a 100. 75. 50. or 25 character message

LEDs show which 25 character memory is

Ultra reliable solid state keying: grid block,

(4096 bits total).

in use and when it ends.

10 ma. max., + 300 V, 100 ma. max.).

A swltch comblnes 25 character messages

Built-In memory saver. Uses 9 volt battery,

for up to three 50 character messages.

no drain when power IS on. Saves messages

CMOS ICs, MOS memories. Use 12 to 15 VDC

To ntard, pull out the speed control, touch

in memory when power loss occurs or when

or 110 VAC with optional AC adapter, $7.95.

a message button and send. To playback,

transporting keyer. Ultra compact. 8x2~6 Automatically switches to external batteries

push in the speed control, select your mes

inches. All IC's ~nsockets.

when AC power is lost.

sage and touch the button. That's all there

PLUS A MFJ DELUXE FULL FEATURE KEYER.

OPTIONAL BENCHER lAMIbC

is lo it!

bmbk opefalion with squeeze key. Dot-dash

PADDLE for all memory

You can repeat any message continuously

insertion.

keyers. Dot and dash pad.

and even leave a pause between repeats (up

Oatdash mrmofks, self.completing dots and

dles have fully adjustable

to 2 minutes). Example: Call CO. Pause. Lis-

dashes, jamproof spacing, instant start (ex-

tension and spacing for the exact "feel" you

like. Heavy base with nonslip rubber feet

ten. If no answer. ~t repeats CO again. To

cept when recording).

answer simply start sending. LED indicates

All controls are on front panel: speed,

ellminates "walking". $39.95 plus $3.00 for

Delay Repeat Mode.

weight, tone, volume. Smooth linear speed

shipping and handling.

THIS MFJ-482 FEATURES FOUR 25 OR A 50 AND TWO 25 CHARACTER

THIS MFJ-481 GIVES YOU TWO 50 CHARACTER MESSAGES.

Speed, volume, weight,

MESSAGES.

Speed, volume, tone

tone controls

controls

Combine memay switch

Repeat funclan

Repeat, tune funclons

Tune function

I Similar to MFJ.484 but with 1024 bits of memory, less delay repeat.

memory saver

Bullt-in memory saver

Similar to MFJ-482 but with two 50 character messages, less welght

single memory operating LEO. Weight and tone controls adlustable lrom

controls. Internal tone control. Volume control is adjustable from rear

rear panel. 6x2~6

inches. 110 VAC or 12 to 15 VDC.

panel. 5x2~6

inches. 110 VAC or 12 to 15 VDC.

Order By Mail or Call TOLL FREE 800-647-1800 and Charge It on -

/VNI EF&j

MF J ENTERPRISES, IN C. MISSISSIPPI STATE, MISSISSIPPI 39762

2 september 1980

P. 0. BOX 494

MoreDetails? CHECK-OFF Page 94

RECORD

TlONS A. B, C, D (UP TO

cathode, solid state transm~tters(-300 V.

Bu~lt-~n

Order any product from MFJ and try it. If not delighted, return within 30 days for a prompt refund (less shipping).

Order today. Money back if not delighted. One year unconditional guarantee. Add $3.00 shippinglhandling.

For technical Intormatlon, orderlrepalr status, In Mlsslsslppl, outaide continental USA, call 601 -323-5869.

ham

magazine

contents

12 Gunn oscillator design

for the 10-GHz band

Richard Bitzer. WB2ZKW

24 measuring capacitance

of electrolytic capacitors

Jerome H. Hemmye, KP4DIF

26 appreciating the L

matchingnetwork

Earnest A. Franke, WAPEWT

32 half-wave balun:

theory and application

John J. Nagle, K4KJ

37 Yagi antenna design:

quads and quagis

James L. Lawson,WZPV

46 navigational aids

for small-boat operators

Henry S. Keen, W5TRS

50 optimum pi-network design

Ulrich Fleischrnann, DL9LX

58 regulated power supply

for VHF transceivers

Lawrence F. Beebe, WA8RXU

80 counter mixer for the

Kenwood TS-520-SE transceiver

E. R. Larnprecht, W5NPD

64 a simple 40-meter transceiver

Edmund H. Marriner, W6XM

94 advertisers index 4 observations and

83 flea market

comments

88 ham mart

8 presstop

68 ham notebook

94 reader service

74 new products

67 short circuits

september 1980

6 letters

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