MFJ . . . the World Leader in Ham Radio Accessories!

164 Pages·2007·22.66 MB·English

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QS1 2007 Dealer cover.pmd 1 11/9/2006, 2:50 PM
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Hy-Gain_rotators_NEW_3.qxd 4/14/2006 10:39 AM Page 1
ROTATORS
. . . the first choice of hams around the world!
HAM-IV HAM-IV TAILTWISTER SERIES II CD-45II
The most popular $55995 Forlarge medium antenna Forantenna CD-45II
rotator in the world! arrays up to 20 sq. ft. wind load. arrays up to 8.5 $38995
For medium communications Available with DCU-1 Pathfinder sq. feet mounted
arrays up to 15 square feet wind digital control (T2XD) or stan- inside tower or 5
load area. New5-secoWnd brake dard analog control box (T2X) sq. ft. with mast adapter. Low
delay! NewTest/Calibrate func- with new5-second brake delay temperature grease good to
tion. Newlow temperature and newTest/Calibrate func- -30 F degrees. New
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grease permits normal tion. Low temperature Test/Calibrate
operation down to -30 grease, alloy ring function. Bell
degrees F. Newalloy Wgear, indicator rotator design
ring gear gives extra .potentiometer, fer- gives total
strength up to 100,000 PSI for maximum rite beads on poten- weather pro-
reliability. Newindicator potentiometer. Rtiometer wires,newweather- T-2X tection, dual 58 ball bearing racegives
Newferrite beads reduce RF susceptibility. proof AMPconnectors plus $64995 proven support. Die-cast ring gear, stamped
NewCinch plug plus 8-pin plug at control 8A-pin plug at control box, steel gear drive, heavy duty, trouble free
box. Dual 98 ball bearing race for load triple bearing race with 138 T-2XD gear train, North center scale, lighted direc-
bearing strength and electric locking steel ball bDearinigs for large load $102995 tional indicator, 8-pin plug/socket on con-
wedge brake prevents wind induced antenna bearing strength, electric lock- trol unit, snap-action control switches, low
movement. North or South center of rota- ing steel wedge brake, North with DCU-1 voltage control, safe operation, takes maxi-
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tion scale on meter, low voltage control, or South center of rotation scale on meter, mum mast size to 21/16inches. MSLD light
max mast size of 21/16inches. low voltage contrSol, 21/16inch max. mast. duty lower mast support included.
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HAM IVand HAM VRotator Specifications TAILTWISTER Rotator Specifications CD-45II Rotator Specifications
Wind Load capacity (inside tower) 15 square feet Wind load capacity(inside toCwer) 20 square feet Wind load capacity (inside tower) 8.5 square feet
Wind Load (w/maWst adapter) 7.5 square feet Wind Load (w/ mast adapter) 10 square feet Wind Load (w/ mast adapter) 5.0 square feet
Turning Power 800 in.-lbs. Turning Power A1000 in.-lbs. Turning Power 600 in.-lbs.
Brake Power 5000 in.-lbs. Brake Power 9000 in.-lbs. Brake Power 800 in.-lbs.
Brake Construction WElectric Wedge Brake Construction MElectric Wedge Brake Construction Disc Brake
Bearing Assembly dua.l race/96 ball bearings Bearing Assembly Triple race/138 ball brngs Bearing Assembly Dual race/48 ball brings
Mounting Hardware Clamp plate/steel U-bolts Mounting Hardware Clamp plate/steel U-bolts Mounting Hardware Clamp plate/steel U-bolts
Control Cable Conductors 8 Control Cable Conductors A8 Control Cable Conductors 8
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SEhffiepcptiinvge WMeoigmhetnt (in tower) 28i00 f2t6.- llbbss.. SEhffiepcptiinvge WMeoigmhet nt (in tower) 3400 f3t1.- llbbTss.. SEhffiepcptiinvge WMeoigmhet nt (in tower) 1200 f2t2.- llbbss..
HAM-V HAM-VFormediuUm $2A8R-490 95 FoArcRom-4pa0ct $O1HD3R7-3090A95 For HkinDg-Rsiz-e3da0n0tenAna
$94995 a1n5t esqnunaar aer freaeyts wupin Rtdo large FM/TVupa nttoe n3n.0a saqrruaayrse afenedt Rarea. Coanrtrraoyls c uapb lteo c 2o5n nseqc.ftto. rw, ninedw load
with DCU-1 load area. Similar Uwind load area. Dual 12 ball bear- hardUened stainless steel output shaft,
ing race. Automatic position sensor
to the HAM IV, but newNorth or South centered cali-
includes DCU-1 Mnever needs resetting. Fully auto- bratiLon, newferrite beads on
Pathfinderdigital matic control -- just dial and potentiom.eter wires reduce RF sus-
touch for any desired location.
control unit with E ceptibility,newlonger out-
gas plasma display. Solid state, low voltage control, putH shaft keyway adds relia-
Provides automatic sLafe and silent operation. 21/16 bility. Hieavy-duty self-cen-
inch maximum mast size.
owpitehra mtioanny o lfo bgrgaikneg /acnodn treostto rp,r coogmrapmasti, b6l epre- MsuSpELpoDrt l.iingchltu dduetdy. lower mast htearridnwgasrteee.2 lD cils.apmlapy aancdcurate
sets for beam headings, 1 degree accuracy, to 1o. Machined steel output.
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auto 8-second brake delay, 360 degree AR-40 Rotator SpHecifications HDR-300ARotator Specifications
choice for center location, more! Wind load capacity (inside tower) i3.0 square feet Wind load capacity (inside tower) 25 square feet
ROTATOR OPTIONS Wind Load (w/ mast adapter) 21.5 square feet Wind Load (w/ mast adapter) not apOplicable
MSHD, $99.95. Heavy duty mast support TBurrankien gP Powowerer .435500 iinn..--llbbss.. TBurrankien gP Powowerer 75500000 iinn..--llbbss..
for T2X, HAM-IVand HAM-V. Brake Construction DiRsc Brake Brake Construction solenoid operated locking
MSLD, $39.95. Light duty mast support Bearing Assembly Dual race/12 ball bearings Bearing Assembly bronze sleeve w/rollers
for CD-45II and AR-40. Mounting Hardware Clamp plate/steel bolts Mounting Hardware stainless steel bolts
TSP-1, $34.95. Lower spacer plate for Control Cable Conductors O5 Control Cable Conductors 7
HAM-IVand HAM-V. Shipping Weight 14 lbs. Shipping Weight 61 lbs.
Effective Moment (in tower) 300 ft.-lbs. Effective Moment (in tower) 5000 ft.-lbs.
Digital Automatic Controller AR-35 Rotator/Controller http://www.hy-gain.com
Automatically con- ForUHF, VHF, 6-
AR-35 Nearest Dealer, Free catalog, To Order . . .
trols T2X, HAM-IV, V Meter, TV/FM antennas.
$6995 800-973-6572
rotators. 6 presets for Includes automatic con-
favorite headings, 1 degree troller, rotator, Voice:662-323-9538 Fax:[phone]
accuracy, 8-sec. brake mounting clamps,
DCU-1 delay, choice for center of rotation, mounting hardware.
$64995
crispplasmadisplay. Computer 110 VAC. One
controlled with many logging/contest programs. Year Warranty.
RBD-5 NEW! Automatic Rotator Brake Delay
$3495 Provides automatic 5-second brake delay -- insures your
rotator is fully stopped before brake is engaged. Prevents Antennas, Rotators & Towers
accidentally engaging brake while rotator is moving. Use with HAM II,
308 Industrial Park Road,Starkville, MS 39759, USA
III, IV, V, T2Xs. Easy-to-install. Includes pre-assembled PCB, hardware.
Prices/specs subject to change without notice/obligation (c)2006 Hy-Gain.
Ad for QST Sept 06.qxp 7.24.2006 1:18 PM Page 1
The Standard By Which All Others Are Judged
NNEEWW PPRROODDUUCCTTSS FFRROOMM TTHHEE IINNNNOOVVAATTOORRSS AATT DDIIAAMMOONNDD
MAY1000 CP725H
Handheld Direction Finding Beam Antenna Diamond’s new CP725H is a four band (6M, 10M, 15M and
The MAY1000 handheld beam is a 40M) trap vertical antenna with trap radials. Its light weight,
great antenna for radio direction find- 6.6 pounds, makes it very manageable during the installation
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ing on frequencies ranging from process and will allow for a simple mast solution. It is 11.8
120MHz up to 500MHz. Every aspect feet tall and the radials are 71” long and can be mounted
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of the MAY1000 is adjustable to opti- 360 degrees around the antenna or concentrated on one side
mize the antenna for a specific fre- if you need to mount it close to a structure.
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quency using a. measuring tape and a Because of its light weight and the ability to concentrate radi-
laminated frequency chart that are als on one side, the CP725H could be used in an antenna
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both provided. Whether you are track- restricted situation where the mast was lowered on its side
ing birds, dogs, ELTsA or a stuck during daylight and raised while operating during the evening.
transmitter, this antenna will be a
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great addition to your kit. The i39” Bandwidth: 6 Meters 500KC,
cable attached to the antenna is ter- 10 Meters 600KC, 15 Meters
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minated with a BNC connector. 300KC, 40 Meters 45 KC.
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Power handling: 500W P.E.P.
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@28/50MHz, 400W P.E.P.
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A @21MHZ and 200W P.E.P.
@7MHz.
W.FMreAquYe1nc0y 0A0djustment Chart eblSeetpmwaeecneetns M
(cm7600) Radio wave directionPelement length R element length (33c50m) A
G50 25
E(mleemaesunrte Lmeenngtt hiof one side)4300 Pelement R element eblSeetpmwaeecneetns 2105Space between elements T
20 10
U10
0120 200 Freque3n0c0y (MHz)400 500 O
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K9000 Motorized Mount
Diamond’s K9000 motorized antenna mount is a Mtried and L
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true product for light weight VHF/UHF antennas. I like to
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think of it as a garage door opener. My garage door opener H
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malfunctioned last year. It wasn’t 24 hours before it was at
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the top of all the honey-do lists to get replaced. Neither my E .
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wife or I wanted to leave the car to open that door.
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Well, we don’t want to get out of the car to lower the H
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antenna either. With the K9000, every time we park in the
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garage, go into a parking structure or drive through a fast 2. et
food establishment it’s a simple matter n
of pushing the button and the antenna R a.
is safely lowered and out of harm’s n
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way. My garage door opener isn’t a n
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luxury, it is a necessity. I think of my To locate an Authorized Diamond Antenna
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K9000 motorized antenna mount in the Dealer call 760-744-0900 n
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same way.
or visit our website at d
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Diamond Antenna is a division of RF Parts Company i
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This Month in QST
January 2007 Volume 91 Number 1
QST (ISSN:0033-4812) is published monthly as its offi cial journal by the American Radio Relay League, Inc, 225 Main Street,
Newington, CT 06111-1494, USA. Periodicals postage paid at Hartford, CT, USA and at additional mailing offi ces.
POSTMASTER: Send address changes to: QST, 225 Main St, Newington, CT 06111-1494, USA.
W Technical
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28 A Simple Add-On RF Stage for Regenerative Receivers ............. Charles Kitchin, N1TEV
Update that old regen to improve performance and make your neighbors happy.
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31 .High Sensitivity Crystal Set ....................................................................... Bob Culter, N7FKI
Modern components can make the old crystal set sing.
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34 A Two Element “Wonder Bar” Beam for 17 Meters .......................... Gary A. Cook, W9JSN
The wAonder bar design returns from the 1950s, set up for a modern band.
37 Old Amplifi ers — Boat Anchors or
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Bargain Basemient Opportunities? .................................................... Tom Sowden, KØGKD
Those old amplifi ers from fl ea markets and auction sites can still put out the power.
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63 Product Review ......................................................................................... Mark Wilson, K1RO
ICOM IC-R2500 CommSunications Receiver; ElmerRadio Crystal Radio Receiver Kit;
W MFJ-1164 AC Line Filter
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News and Features
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9 It Seems to Us: We Go to Court ........................................................... David Sumner, K1ZZ
12 This JustM In ....................................................................................L.. Jo.el P. Kleinman, N1BKE
Field Day Life Saver; Inside HQ, Media Hits; more.
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42 The Golden Anniversary of the Collins KWM-1 ............................... Mike O’Brien, KØMYW
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During this, the 50th anniversary of the introduction of the venerable Collins transceiver, it’s
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time to take a look at hoEw it came to be and what it meant to 1950s-era hams. .
.
46 How the FCC Helped to End World War II .................................... M. Walter Maxwell, W2DU
Few knew that the FCC’s RadHio Intelligence Division played a central, if quiet, role Rin the war
effort. i
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49 The ARRL Online Auction: Going,2 Going, Gone! ................... S. Khrystyne Keane, K1SFA
.
This fi rst-ever event exceeded expectations, so look for it again!
72 Happenings .............................................R.............................................. Rick Lindquist, N1RL
“Omnibus” rules changes effective December 15; League seeks support for 60 meter
allocation; WRC-07 preparations; Red Cross bOackground checks; more.
US & Possessions: Membership in the ARRL, including a one year subscription Membership without QST is available to the imme diate family of a member
to QST, is available to individuals at $39. Age 65 and over, with proof of age, living at the same address, and to anyone who is legally blind, for $8 per year.
$36. Licensed radio amateurs age 21 and under and the eldest licensee in Foreign remittances should be by international postal or express money order
the household may qualify for the rate of $20. Life Membership, inc luding a or bank draft negotiable in the US and for an equivalent amount in US funds.
subscription to QST is available at $975.* Age 65 and over, $900.* Member-
ship and QST cannot be separated. Libraries and institutions, $39 per year. Copyright © 2006 by the American Radio Relay League Inc. Title registered
Single copies $5. at the US Patent Offi ce. International copyright secured. All rights reserved.
Quedan reservados todos los derechos. Printed in the USA.
International
To compensate for additional postage for mailing outside the US, the follow- QST®, DXCC®, VUCC®, DX Century Club®, ARES® and Amateur Radio
ing rates apply: Emergency Service® are registered trademarks of the American Radio Relay
League, Inc.
Canada: Membership in the ARRL, including a one year subscription to
QST, $49, payable in US funds. Life Membership, including a subscription to The ARRL and QST in no way warrant the products described or reviewed
QST is available at $1225.* Libraries and institutions, $49 per year. herein.
All Other Countries: Membership in the ARRL, including a one year QST is available to blind and physically handicapped individuals on audio cas-
subscription to QST, $62, payable in US funds. Life Membership, including a sette from the Library of Congress, National Library Service f or the Blind and
subscription to QST is available at $1550.* Libraries and institutions, Physically Handicapped. Call 1-800-424-8567.
$62 per year. Indexed by Applied Science and Technology Index, L ibrary of Congress
*Payment arrangements available. Please write for details. Catalog Card No: 21-9421.
4 January 2007
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QST Workbench
51 The Doctor Is IN
Harold Kramer, WJ1B
Sideband legalities; feeding open wire line through walls; stealth antennas.
Publisher
53 Short Takes ..........................................................................................Larry Wolfgang, WR1B Steve Ford, WB8IMY
Editor
K4AVU Coax Crimper
Joel P. Kleinman, N1BKE
54 RF Activated Timer ........................................................................Allen T. Poland Jr, K8AXW Managing Editor
Avoid repeater timeouts by sensing your signal.
S. Khrystyne Keane, K1SFA
56 Hands-On RadiWo ..................................................................................... H. Ward Silver, NØAX Assistant Editor
Joel R. Hallas, W1ZR
Experiment #48 — Baluns
Technical Editor
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58 Simple Audio Computer to Transmitter Morse Keyer .....................Dennis McCall, KF3AD Larry D. Wolfgang, WR1B
Dean Straw, N6BV
Make computer generated code that works the fi rst time.
Senior Assistant Technical Editors
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60 Wire Antennas — Keeping Them. Up ................................................... Joel R. Hallas, W1ZR Rick Lindquist, N1RL
Wire antennas can work well…if they don’t get blown down in the breeze! Happenings
61 Hints & Kinks ..................................R.................................................Larry D. Wolfgang, WR1B Mark J. Wilson, K1RO
Product Review
Idiot lights; paddle hint; cigarette lighter adapters; more.
A Mike Tracy, KC1SX
Product Review Lab Testing
D Steve Ewald, WV1X
i Public Service
Tom Hogerty, KC1J
Operating O Contests
Mary M. Hobart, K1MMH
At the Foundation
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W Bill Moore, NC1L
DX Century Club
50 School Club Roundup 2007 ............ Lew Malchick, N2RQC
Eileen Sapko
99 Results, W2006 ARRL VHF/UHF Century Club
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UHF Contest ....................... John (JK) Kalenowsky, K9JK John Troster, W6ISQ
Paul L. Rinaldo, W4RI
W M Al Brogdon, W1AB
. Bernie McClenny, W3UR
28 A John Dilks, K2TQN
G H. Ward Silver, NØAX
i T Gene Zimmerman, W3ZZ
Paul Wade, W1GHZ
Contributing Editors
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Michelle Bloom, WB1ENT
R Production Supervisor
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Jodi Morin, KA1JPA
U Assistant Production Supervisor
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Joe Shea
Production Assistant
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Maty. Weinberg, KB1EIB
46 Production Coordinator
E OUR COVER
From the bottom: A Harvey Wells Band- Sue FaHgan
Lmaster TBS-50C Senior Transmitter, a Graphic Desiign Supervisor
Globe Matcher WRL Electronics Model David Pingree,2 N1NAS
EAT4 Antenna Tuner and a Hallicrafters Senior Technical Illu.strator
54 .Skyrider SX-12 Commercial Receiver
Devon Neal, KB1NSR
HgIsrsaucee. tBhied dceorvse rto oofk o huor manen tuhaels Vei nthtaregee Technical Illustrator R
items, iand many others, in the ARRL’s Ed Vibert
fi rst-ever Online Auction. Read more Proofreader O
about the2 Auction on page 49. Photos by
Jon Bloom, K.E3Z. Debra Jahnke, K1DAJ
Business Services Manager
R Bob Inderbitzen, NQ1R
Departments Sales & Marketing Manager
O Amy Hurtado, KB1NXO
Circulation Manager
Diane Szlachetka
Amateur Radio World .............................83 Microwavelengths ..................................87 Advertising Graphics Designer
At the Foundation ...................................98 New Books ..............................................55
Coming Conventions .............................94 New Products ..............................52, 59, 71
Contest Corral .........................................97 Old Radio .................................................90 In order to ensure prompt delivery, we
ask that you periodically check the
Correspondence .....................................24 Public Service .........................................77 address information on your mailing
Eclectic Technology ...............................84 Silent Keys ..............................................92 label. If you fi nd any inaccuracies, please
contact the Circulation Department at
Exam Info ................................................89 Special Events ........................................96 [email protected] or 860-594-0200
Feedback .................................................71 Strays ....................30, 48, 55, 89, 92, 96, 98 immediately. Thank you for your as-
Guide to ARRL Member Services .........14 Technical Correspondence ....................70 sistance.
Reprints and permissions:
Ham Ads ................................................140 Up Front in QST ......................................20
[email protected]
Hamfest Calendar ...................................94 W1AW Schedule .....................................93 See page 14 for detailed contact infor-
Hamspeak ..............................................101 The World Above 50 MHz .......................80 mation.
How’s DX? ...............................................85 75, 50 and 25 Years Ago .........................93 Telephone: [phone]
Index of Advertisers .............................158 Fax: [phone]
January 2007 5
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