Radio Rallies =      Elvaston Castle - June.    Derby - oldest.   MIDCARS / React.    Telford

http://www.g4rga.org.uk/   For a well kept up to date   Rally list

http://www.qsl.net/g4rga/      For links

email=    This email address is being protected from spambots. You need JavaScript enabled to view it.   asked for link permission

More useful web sites=

http://dl5swb.software.informer.com/

Programs developed by DL5SWB   eg -  mini Ring Core Calculator    Use Opera to open,  NOT IE

http://www.egloff.eu/googlemap/carto.php

QTH locator to a map  

http://en.wikipedia.org/wiki/QRA_locator      Says is obsolete

The QRA locator system has three disadvantages, which led to its replacement by the current Maidenhead system:   It does not cover the whole earth but only an area of 48° by 24°.

If we try to cover a larger area by repeating the letter references, the a given locator corresponds to more than one places on the earth.

Conversion from longitude and latitude to locator reference and vice versa is somewhat complicated.

http://en.wikipedia.org/wiki/Maidenhead_Locator_System

Current   Locator system 

http://www.atdi.co.uk

free propagation tools

http://www.dxsoft.com/

HAM radio software

http://www.dxmaps.com/sitemap.html

Gabriel Sampol   of      Mallorca     Extensive Personal site

http://www.bdg2.dsl.pipex.com/links.html

Brian's Ludicrously Large Links Page   (Not by G4DVS!)

http://www.ntay.com/contest/NGR2Loc.html

NGR to  IARU  QRA locator   Locator    needs 8 character NGR no spaces  

http://www.echolink.org/    Software allows licensed Amateur Radio stations to communicate with one another over the Internet, using streaming-audio technology.

http://www.voacap.com/     Voice of America   Propagation.   Installed the program.     See note

http://www.iw5edi.com/software/ham-radio-deluxe-5-download-links     free version of  Ham Radio Deluxe 5.2     Downloaded it

http://www.ham-radio-deluxe.com/products/default.html

Current pay for versions

http://www.dxzone.com/

  The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio

http://www.sdr-radio.com/

  SDR Receivers   Software

http://www.eham.net/reviews

 Good reviews

http://no.nonsense.ee/qth/map.html

QTH Map program   Locator accurate to 5Mtr     Gives locator a 10 digits     and even more accurate  Latitude & Longitude

http://g8jnj.webs.com/currentprojects.htm

Mixed mode helix AE for 2M 70cms     HF loops

http://www.dxmaps.com/callbook/gmap.php

QTH locator on Google maps

http://forums.radioreference.com/coax-cable-connectors/124559-rg-6-coax.html

Coax

http://arrg.us/pages/Loss-Calc.htm    Coax loss calculator

Coax loss

http://en.wikipedia.org/wiki/Coaxial_cable

      Coax

http://www.rfcafe.com/references/electrical/coax-chart.htm

Properties for  long list of coax types

http://www.brendanquest.org/antenna.html

2m across Atlantic     2014   done Canada to Ireland    not 2 way

http://www.mds975.co.uk/Content/amateur_radio_information.html

Good general on amateur radio

http://www.blitzortung.org/Webpages/index.php?lang=en

Shows lightning strikes  in Europe

http://www.lightningmaps.org/realtime?lang=en

   Shows lightning strikes  in Europe   can zoom

https://dxheat.com/

Ability to select the bands independently or as a group to see real time activity including the operating frequency, very handy, but not only that the ability to choose the mode

http://www.ifwtech.co.uk/g3sek/

Amateur Radio Technical Notebook Something on generators

http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm

Bias circuits for Transistor Linear amps.

http://www.ifwtech.co.uk/g3sek/cleansig/imd1.htm

Screen grid stabilisation   for low IMD

http://www.ifwtech.co.uk/g3sek/in-prac/best-of.htm#psud

Toroidal and other chokes

http://www.zetatalk10.com/docs/Radio/Antennas/Amateur_Radio_Antenna_Projects_2004.pdf

Lots of aerials

http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Homebrew_RF_Circuit_Design_Ideas.htm  Homebrew Idea

http://w4dex.com/projects/EER_Transverter_v2.pdf

HF to LF/MF Linear Transverter with 500kHz Class D     EER Power Amplifier

http://qrz.com/db

     Callsign  search site

https://ssl.qrzcq.com/

Callsign  search site    better

http://www.phickman.co.uk/radio/replist.htm

UK Repeater List

http://www.smeter.net/spectrum/spectrum.php

USA info

http://www.dxarchive.com/mw/perseus.html#      a Pretty Excellent Receiver for Software-Eager Unperceivable Signals!!    2007, PERSEUS is the exciting new SDR

http://www.dxarchive.com/mw/perseus.html#

PERSEUS SDR RECEIVER    A site mainly dedicated to Mediumwave Dxing

http://bama.edebris.com/manuals/

Free technical manuals

http://physics.princeton.edu/pulsar/k1jt/

Weak Signal Communication Software

https://groups.yahoo.com/neo/groups/VNWA/info      VNWA is a Vector Network Analyser

http://sdr-kits.net/VNWA3_Description.html

Vector Network Analyzer

http://en.wikipedia.org/wiki/Quite_Universal_Circuit_Simulator

http://www.qsl.net/g4hbt/psk31.htm

SOFTWARE FOR PSK31

http://amsat-uk.org

AMSAT

http://www.issfanclub.com/#

ISS Fan Club    Get in touch with the ISS

http://www.listenersguide.org.uk

SW radio guide   ATC   BBC   Current HF conditions   Radio Heritage      Reviews

http://www.hamsphere.com/features

  Virtual Amateur Radio. HamSphere to simulate a real shortwave Amateur Radio Station

http://www.amwindow.org/tech/htm/gen.htm

old info General Technical Info

http://swling.com/blog/2014/01/the-best-amateur-radio-and-shortwave-apps-for-ios-and-android-smart-phones/

Amateur Radion APPs

http://www.topbanddf.org.uk/index.htm

160M Direction finding

http://www.mods.dk/

modifications repair instructions and improvement of HAM rigs    Need an account

http://qthlocator.free.fr/index.php

To find Long Lat QTH locator

http://www.spaceweather.com/

News and info about the earth - sun enviroment     Aurora  predictions

http://enigmamuseum.com

world's only source for complete, original working Enigma Machines

http://www.bletchleypark.org.uk

http://en.wikipedia.org/wiki/Automatic_Packet_Reporting_System

APRS is transported over the AX.25 protocol using 1200 bit/s Bell 202 AFSK on  2M

http://www.mods.dk/

Best site on internet for modifications repair instructions and improvement of HAM rigs,

http://www.mds975.co.uk/Content/amateur_radio_01.html    Foundation M3,     Intermediate  2E0    Advanced M0

http://www.telegraph.co.uk/news/newstopics/howaboutthat/11786461/Radio-ham-talks-to-space-station-from-garden-shed.html   6/8/15   Radio ham  space station  garden shed

http://www.electronics2000.co.uk/calc/reactance-calculator.php

Easy reactance calculator

http://www.transmission1.eu/index.php?sid=98b91f9db93447996c91e2e7875edcdf    AR  discussion board   160M

http://www.pervisell.com/ham/skysweeper/skysweep.html

Decoders for CW etc    Support stopped in 2009    For Vista   & Floppies!

http://www.dxmaps.com/spots/map.php?Lan=E&Frec=AMUF&ML=M&Map=EU&DXC=N&HF=N&GL=N&mycall=&myloc=&freq=&prop=

Sporadic E Maps

http://www.ban-plt.org.uk/

Ban Power Line Technology  causing QRM   eg like mine Devolo

http://www.ukqrm.org.uk/

pool our knowledge of man-made interference (QRM)

http://secretlisteners.org/

Just that

http://www.mods.dk/member.php

Free    Modifications of rig

http://www.mods.dk/forum.php?action=ListThread&ModelId=67&RadioId=1-yaesu

On FT-857

http://www.sotabeams.co.uk/liquid-electrical-tape/

 Instead of self amlgamating tape.

https://www.ab9il.net/#wintips

tips on windows, Radio, DX conditions, VLF,

http://www.hamgeeks.com/technical-resources/coax-length-to-wattage-lost-chart-for-2m-70cm/      Power lost in coax  2M  & 70cms

http://www.reversebeacon.net/      RBN is a network of stations listening to the bands and reporting what stations they hear, when and how well.

https://sdrworks.wordpress.com/

Some FT-857 stuff

http://mwrf.com/rf-classics/microwave-diodes-why-schottky-barrier-why-point-contact

Microwave Diodes… Why a Schottky-barrier? Why a Point-contact?   Root site good

Sun and Band conditions sites

http://www.dxinfocentre.com/tropo_eur.html

Tropospheric Ducting Forecast   6 DAY FORECASTS OF VHF, UHF & MICROWAVE SIGNAL STRENGTH

http://aprs.mountainlake.k12.mn.us/#

Actual  Tropospheric Ducting from individual stations

http://www.tesis.lebedev.ru/en/sun_pictures.html

Russian Sun info  Magnetic storms,  Flares, Geomagnetic

http://www.hamqsl.com/solar.html#addwebsite

shows HF band conditions

http://www.solarham.net/index.htm

Masses of Solar Info by VE3EN     Good Aurora forecast

http://dx.qsl.net/propagation/

Limited HF propagation info

http://www.arrl.org/here-comes-the-sun

ARRL site. good read

http://prop.hfradio.org/

Radio Propagation : Space Weather : Sunspot Cycle Information

All above in     AR Amateur Radio

Main SDR receivers on Web folder list

websdr*********   use Firefox  or Opera NOT IE  HTML5 does not work    *******

http://websdr.org/java.html

WebSDR problem with the latest Java update Most now allow use of HTML 5  audio feature

Brians list of SDR  Sites  here-

Some have Mobile phone versions

http://websdr.org/

   The most complete list of SDR

http://www.dxzone.com/catalog/Internet_and_Radio/WebSDR/

list of SDR

http://hackgreensdr.org:8901/

HF WebSdr is located at the Nantwich Secret Nuclear Bunker, formerly R.A.F. Hack Green.   Best of all.

http://hackgreensdr.org:8902/

VHF / UHF WebSdr is located at the Nantwich Secret Nuclear Bunker, formerly R.A.F. Hack Green

http://www.1942khz.net/

Derby SDR   160m only Is close to   Martyn, G8DKV.   who will overload

http://websdr.ham.ee:8901/

located in Estonia (KO18UO)

http://websdr.suws.org.uk/

web 9 3cm  23cm   70cm   2m   Southampton

http://mowcopsdr.boldlygoingnowhere.org:8901/

10Ghz  Mow cop

http://amsat-uk.org/2013/12/28/websdr-for-434-and-1296-mhz/     Southampton   70  23cm

http://129.187.5.188:8901/

      2m amateur band from the Olympic Tower Munich, Germany.

http://g7jjp-websdr.no-ip.org:8901/

LW  Peterborough

http://sdrspace.com/

Actual SDR receivers

http://rsgb.org/main/operating/web-sdr-receiver/     Boulton   G4HYG     20  40  160M but only to 1860

http://w5za.no-ip.org/

  10M     28140 - 28330 Shreveport, Louisiana,    10M SSB  band plan 28225 - 29100 

http://www.160m.net/

Top band SDR by G4FPH    near Stafford in central England (IO92AS). Think very deaf

http://sk4ko-websdr.no-ip.org:8901/

Sweeden   80 40 20

http://www.cheshiresdr.co.uk/

Chester SDR    433000 - 434950,   144 - 146,   28 - 30Mhz

http://radiogeek.co.uk/

Cleethorpes SDR    IO93XN 432 - 434,    434 - 436,     144 - 1463cm 10,368 - 10,370

http://websdr.suws.org.uk/

Farnham Southhampton WebSDR     3cm  432-434 434-436 & 436-438,   143-145  145-147,    49.99 - 51.99,    5khx 2Mhz    

http://websdr.ewi.utwente.nl:8901/

Covers LW to 10M in one sweep Not very sensitive on 160M    Only a Mini-Wip

http://weert.websdr.nl/

 160  can just be heard on Narrow CW   , 80, 40, 20, 17

http://dj3le.spdns.de:8901/

160     500Hz - 2400Hz   quite sensitive Can here me, 80,   40,   20,    15,    10      Silberstedt 10km west of Schleswig, North-Germany JO44PN  84m loop/MiniWhip

http://websdr.sk3w.se:8901/

160 can hear me,    80  CW  SSB,    40,  20 CW,  15,  10  144-145 Sweeden

http://hackaday.com/2015/02/12/why-you-should-care-about-software-defined-radio/

general intro

http://w7rna.dyndns-remote.com:18901/    W7RNA WebSDR receiver at Sedona, AZ. - approx. 100 miles (160km) north of Phoenix  Arizona USA    40,  80,  160M

http://k2sdr.dyndns.org:8902/

Web SDR in New Jersey   USA80m-  G5RV - located 1/2 mile W. of Atlantic Ocean    +Hustler 6BTV     Aerial      Just in on CW on 20M

http://websdr.yo3ggx.ro:8765/

SDR Bucharest, Romania (KN34bk)    80 40 30 20

http://websdr.ham.ee:8901/

Estonia (KO18UO)   160 80 40 30

http://www.globaltuners.com/

Receivers you can take over

http://sdr.mysdr.de:8901/

2M  11M   10M  15M   located near Friedrichshafen (at Lake Constance / Bodensee, South Germany).

http://dalkeithsdr.co.uk:8901/     Dead

http://ardam-andorra.no-ip.org:8901/

Andora 40 6 80 20M

http://g3xbm-qrp.blogspot.co.uk/2010/01/web-sdr-locations.html

http://websdr.ewi.utwente.nl:8901/

Wideband SDR  LW to 10M  at Twente Netherlands.  Not very sensitive

http://amateurradioreceiver.com/stations.php

List of SDR Says use   http://websdr.org/ instead of this site

http://www.160m.net/

160 80 40   at Stafford G4FPH     

http://g4hyg.no-ip.net:8901/

60 40 20 160m Boulton G4HYG  10m vertical optimised for local ground

http://websdr.suws.org.uk/

Farnham WebSDR

SDR design

http://www.reddit.com/r/RTLSDR/comments/2g4w2f/question_regarding_rtlsdr_r820t_performance_on/

http://wwwhome.cs.utwente.nl/~ptdeboer/ham/sdr/

PA3FWM's software defined radio page

Other URLs

http://websdr.org/java.html

January 14, 2014, Oracle released Java 7 update 51, and with that update using WebSDR receivers has become more difficult.

http://www.websdr.org/faq.html

FAQ  about the WebSDR project IE  does NOT support  HTML5 Use Opera  V15,   Firefox  V17

https://www.flightradar24.com/60,15/6

http://www.lightningmaps.org/?lang=en#y=-9.3974;x=34.0086;z=7;t=3;m=sat;r=0;s=0;o=0;b=;n=0;

Shows live lightning worlwide

http://www.mds975.co.uk/Content/pirateradio.html

The Story of Offshore & Pirate Radio

Java  now use HTML5

on Firefox

http://vk5pas.org/category/websdr/ =   The WebSDR project has, since its beginning, used Java applets to play sound and show the waterfall display. These are so-called “unsigned” applets, which run in a restricted environment (called “sandbox”), where they cannot do any harm to your computer and thus are totally safe, in principle.

 Java and this sandbox are made by Oracle, and apparently Oracle has trouble making this sandbox totally safe. These bugs can be exploited by malicious applets to harm your computer. In the latest Java release, they apparently gave up the hope of fixing all sandbox bugs; instead, they now make it as difficult as possible to run unsigned applets at all, both the malicious and the good ones.

On Windows/Mac, you can find this list by going to the system control panel or System Preferences and choosing Java (you may want to use the control panel’s search function); then choose the Security tab, and click on “Manage Site List”. Then there’s an “Add” button to add a URL to the list. Put the complete URL there,

HTML5 Is not a total solution either: it doesn’t work on Internet Explorer, and generally not on older versions of browsers.    So I always use  Firefox or Avant.