hammag-03-2010

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HAM-MAG
March2010
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InernationalHAMMagazine­
100%HAMRADIO
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5500MMHHzz­­DDXXNNeewwss 2299
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PPOOSSTTIITT!! 33
YO2BS,50yearsontheair 12
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ThehistoryofTorreBert 36
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DDXXNNEEWWSS 2222
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HAM­MAGN.14
March2010]
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IcelandAmateursReceiveNewPrivileges
AsofFriday,February19,Iceland’sPostandTelecomAdministration(PTA)grantedtemporary
experimentalaccesstothe4and600meterbandsatleastthroughtheendof2010,accordingto
IslenzkirRadioamatorar(IRA)PresidentJonasBjarnason,TF2JB;theITAisIceland’sIARUMember­
Society.AfterobtainingaspeciallicensefromthePTA,BjarnasonsaidthatTFstationswith“N”or“G”
classlicensesmaynowoperatebetween493­510kHzand70.000­70.200MHzrunning100W.
Amateuroperationsonbothbandsaregrantedonasecondarybasis.
LaunchofNewARRLWebSiteDelayedto"GetitRight"
AftermeetingwithARRLstaffonFebruary23­­twodaysbeforethenewARRLWebsitewastolaunch
­­ARRLChiefOperatingOfficerHaroldKramer,WJ1B,madethedecisiontodelaytheunveilingofthe
WebsiteuntillateMarch."WorkonthenewARRLWebsitehasprogressedatafranticpacebutthere
arestillsomepotential'bugs'thatcouldaffectmembers.Weneedtobesurewegetitright,"Kramer
said."Ourmembers'security,informationandabilitytoactuallyuseofalltheoptionsonthenewsite
outweighanyrushtomeetanartificialdeadline.It'sjustgoodcustomerservice."
ThenewWebsite­­whichwillcontaintheonlinestore,classregistrations,audio,video,DXCC
information,contestdata,individualizedmemberoptionsandother21stcenturyopportunitiesfor
members­­isoneofthelargesttechnologyupgradeactivitiesthatARRLandFathom,thecompany
programmingthesite,haveeverundertaken."Reviewershavebeenunanimouslyimpressedandare
helpingmakesurewecreatetheeasiest,mostenjoyableonlineexperiencepossible,"Kramer
explained.AccordingtoARRLMediaandPublicRelationsManagerAllenPitts,W1AGP,thecurrent
ARRLWebsiteisnotonlyusedbyARRLmembers,butisaprimereferencesourceforengineers,
hamsandwirelesstechniciansaroundtheworld,makingitthepremierplacetofindinformationabout
AmateurRadio,itsactivitiesandthesciencesbehindit."TheWebisourmainfacetotheworld,andthe
newWebsitewillbefantastic,"hesaid."Althoughweallregretthedelay,Ibelieveourmemberswill
appreciateourdiligenceabouttheeaseofuse,securityandnavigationforthenewsite."
Tweetsinspace­ISSgetswebaccess
Inahightechfirst,astronautsinspacefinallyhaveInternetaccess.
SpacestationresidentTimothyCreamerhasbeenworkingwithflightcontrollerstoestablishinternet
accessfromhisorbitalposteversincehemovedinlastmonth.Hepostedthefirstlivetweettrulyfrom
space."HelloTwitterverse!"hewrote.Before,astronautshadtosendTwitterupdatesbye­mailto
MissionControlinHouston.Thencontrollerspostedthetweets.TheInternationalSpaceStationcrew
cannowuseanon­boardlaptoptoseeadesktopcomputeratMissionControl,andtherebybrowsethe
web.Thisremoteinternetaccessispossiblewheneverthereisasolidhigh­speedcommunication.
Wina...OneyearactivememberofHam-Mag.
Sendusanarticleandwhenitispublishedyouwinyouradhesion.
Tellittoyourfriends.
Sendarticleto:f5sld@free.fr
[
HAM­MAGN.14
March2010]
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Theconfectionideeaofthissourcecamefromthefeedingnecessityofsomedevices(like:clock,
economiclightbulbat12V,radiostations)becauseofthelackofelectricstream,onadefinitelimited
timeperiod(dependsonthebetterycapacity).
I'vechosentheusageofaslug(Pb)batterywith12V­7Ahtightacid(usedinalotofindustrial
schemes,like:alarms,openingdoorlatches,etc).
I'vethoughtforaschemewiththeautomaticchargepossibilityofthebatteryfromthe220Vnetworkby
theinstrumentalityofaredressor­transformerandofa555tipcircuitwiththepossibilityoftuningthe
charginglintels(up)and(down)withthehelpofsomesemi­adjustable.
ThechargingIisgivenbytheR4resistance,whichisarroundthevalueof0,2A.Thepiecesare
mountedonalaywiththeexceptionofthetransformer,ofthefuseonthebatteryandoftheLEDdiodes
whichsignallsthestateofdevice.
Diode(LED1)signallsthatthedeviceisconectettothe220Vnetwork.
Diode(LED2)signallsthevoltagepresencetothevent+13V
Diode(LED3)signallsthatthebatteryischarging;Thisdiodeturnsonandoffautomaticallyatan
intervalofapproximate30seconds­basedonthevoltagetunings­theupperlintelandthelowerlintel­
ofthesemi­adjustables.Theschemeisfunctioningfromthestart,butthetwolintelsemi­adjustable
mustbeadjusted.
Stuffslist
TR1­220/15V­1A
P1=B100C1500R
Z1­DZ10V
T1­BC171C
T2­BD238
C.I.­NE555
S1,S2­semi­adjustable0,5W­10K
Sig1­1A
Sig2­4A
R1­330Ω10,5W
R2­1K10,5W
R3­330Ω10,5W
R4­24Ω2W
R5­6K­0,5W
R6­18K­0,5W
R7–220Ω
R8–1KΩ
R9–2K2
Accum=12V/7Ah
S1­itadjustsforUmax=14,2V
S2­itadjustsforUmin=13,4V
Oncemadethistwoadjustments,thedeviceisfunctional.
Iwishyou:Success!
Y06QCZ­Dorin
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HAM­MAGN.14
March2010]
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[
HAM­MAGN.14
March2010]
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