Past Presentations and Articles

Some documents rescued from the old IVARC site - hopefully their owners well recognise them and add an appropriate synopsis

 Graham King G3XSD  How aerials really, really work

aerials.pdf
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Graham King G3XSD How can I do DSP on my microcontroller 

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dsp1.pdf
File Size:	68 kb
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dsp2.pdf
File Size:	234 kb
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dsp3.pdf
File Size:	212 kb
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dsp4.pdf
File Size:	128 kb
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dsp5.pdf
File Size:	119 kb
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dsp6.pdf
File Size:	220 kb
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An Introduction to Echolink
John Noden G8IOK January 2008

echolink.ppt
File Size:	179 kb
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Electronic QSLing with eQSL - Ted Stiles G8BHK

electronic_qsling_with_eqsl.pdf
File Size:	355 kb
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50MHz Collapsible 2 Element Mini Beam: 
An Overview the Development of the “6MBA”
Mike Parkin GØJMI

g0jmi_-_radio_club__presentation_001.pdf
File Size:	5894 kb
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Loops and how antennas (aerials ) really work
Professor Mike Underhill - G3LHZ June 2010

g3lhz.pptx
File Size:	17843 kb
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Digital TV: ATV, Freeview, Freesat and all that…
Noel Matthews G8GTZ August 2009

g8gtz_aug_09.ppt
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  Feld Hellschreiber  Graham King G3XSD

hellinfosheet.pdf
File Size:	273 kb
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Band Pass Filter Design - Richard Harris G3OTK

1_filter_article_version_2.pdf
File Size:	147 kb
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2._qandkmethod.pdf
File Size:	125 kb
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3._nortonstheorem.pdf
File Size:	55 kb
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4._improvinghfsideresponse.pdf
File Size:	58 kb
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5._bartletts.pdf
File Size:	43 kb
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6._inductorlosses.pdf
File Size:	76 kb
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7_zmatching.pdf
File Size:	76 kb
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8._predistortedfilters.pdf
File Size:	60 kb
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9._measurements.pdf
File Size:	181 kb
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Low-power beacons
Paul Wilton M1CNK  June 2009
A brief introduction to setting up and receiving low power beacons - QRSS and WSPR.

mept-talk-for-ivr.pdf
File Size:	5886 kb
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Introduction to VHF/UHF Propagation
Paul Wilton M1CNK June 2013
An introduction to the different mechanisms behind VHF and UHF propagation and how to optimise their use.

an_introduction_to_vhf_talk_2013.pdf
File Size:	1820 kb
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RF ground, counterpoises and elevated radials
Graham King G3XSD

rfgroundpaper.pdf
File Size:	242 kb
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Software Defined Radio
Graham King G3XSD

sdrtalk.pdf
File Size:	482 kb
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Security

securitypt1.pdf
File Size:	323 kb
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securitypt2.pdf
File Size:	1957 kb
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Small Garden Antennas  Graham King G3XSD

small_garden_antennas1.pdf
File Size:	454 kb
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Radio Amateur Test Gear
Paul Wilton M1CNK
A brief run through of useful test gear for the radio amateur, including some based upon low cost micro-controllers.

test_gear_for_the_radio_amateur.pdf
File Size:	9340 kb
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A Tale of two digimodes
Graham King G3XSD

hellolivia1.pdf
File Size:	8829 kb
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Key-clicks and CW Waveform Shaping
Richard Harris G3OTK

keyclicks_version_1.pdf
File Size:	756 kb
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A 3 Band QRP CW Transceiver
Richard Harris G3OTK

a_3_band_qrp_cw_transceiver_version_3.5.pdf
File Size:	1486 kb
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The W3DZZ antenna  

Graham King G3XSD

w3dzzslides.pdf
File Size:	1057 kb
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​Loop Antennas
Glyn Thomas M0GXT
Paul Wilton M1CNK

loop_antenna_extra_ivarc_talk_11aug2017.pdf
File Size:	4976 kb
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m1cnk_loop_talk_2017_08_11.pdf
File Size:	30617 kb
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14/21 MHz Trap dipole
Graham King G3XSD                                                                                       

trap1.pdf
File Size:	1444 kb
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Multi-Band Magnetic Loops

Alan Badcock
G8IPQ

multi-band_hf_magnetic_loop_slides_-1.pdf
File Size:	3770 kb
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Practical usage of  MMANA-GAL for antenna modelling

Graham King 
G3XSD

mmana-galpractical__use.pdf
File Size:	1406 kb
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Enigma: The code and its cryptanalysis, a broad        overview of the Allied effort to decipher ENIGMA     traffic before and during WWII

Steve Tindale
G8XEV

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Waterfall Bandmap video in N1MM

A short mp4 example using SDRPlay RSP1A for panadaptor operation and a Kenwood TS-590S as the main transceiver.   The antenna is the IVARC active rx loop. Sound is included. Simply click on the 'play' button
and click on the frame enlarge to full screen

Graham King
G3XSD

enigma.pdf
File Size:	4955 kb
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Waterfall Bandmap/N1MMplus used in the 'normal way'

The advantages of this are: more compact, and
if used with a cluster site, many signals will be
tagged with their callsigns and in addition clicking
on the callsign causes the call to be entered in the log

Graham King
G3XSD

How to configure and use N1MM+ when starting 80m CW club contests

As part of the IVARC Morse school training sessions, this guide helps getting started and dipping one's toes into contesting

Graham King
G3XSD

n1mm_usage.pdf
File Size:	1269 kb
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How to configure and use N1MM+ 80mCW club contests
Part 2

This part shows how to submit your log to the RSGB
Contest Committee

Graham King
G3XSD

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Maritime Radio... then and now

Graham King
G3XSD/GWZM/GYMT/GZSV

n1mm_usage2.pdf
File Size:	391 kb
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marineradio.pdf
File Size:	3773 kb
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