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G8JNJ

ECLECTIC AETHER - Adventures with Amateur Radio

WEBSITE Status

I'm sorry that my website hasn't been updated much recently.

There are problems with the web editor interface and updating existing pages is problematic.

WEB SDR's


I run the WEB SDR IO group which is primarily aimed at WEB SDR admin's and owners with the aim of sharing experiences and technical expertise relating to operation and running of WEB SDR's - https://groups.io/g/websdr


I'm one of the Admins for the SUWS WEB SDR  - http://websdr.suws.org.uk/ 


I also operate a number of KiWi WEB SDR's which cover the 0-32MHz frequency range


http://websdr.uk:8060/


http://kernow.hopto.org:8073/


http://kiwi.farnham-sdr.com:8073/




Antennas

Active Antennas - Updated June 2021


Loop on the Ground Receive Antenna - First draught added June 2021


Broadband Receive Loop Inductance - First draught added June 2021


Mobeus Receive Loop Antenna - First draught added June 2021


Balun Loss & Experimental method of measurement - First draught added June 2021


50MHz Mixed Mode Omni Antenna


Mixed Mode Helical Antennas

Broadband Vertical antennas Comet CHA-250B & Diamond BB6W & BB7V


G8JNJ Broadband HF Vertical Antenna - Requires no tuner


HF loop antennas


1m HF loop antenna - Uses a novel tuning capacitor - RADCOM antennas column Sept / Oct 2010


G8JNJ ‘Fat-Max ® ’ HF Antenna - 6m to 40m - the poor man's Steppir


HF Variable Pitch Helical antennas DG7PE & Chameleon V1


Loft and Attic antennas for restricted places


33ft Verticals and Ununs


G7FEK Multiband compact garden antenna


M3KXZ no-counterpoise antenna - Does it actually work ?


Slinky antennas - Compact antennas made from Slinky toys are likely to be poor performers


Solarcon / Antron A99 - How well does it work on other bands ?


Portable Vee Dipole - Uses fishing poles and a lighting tripod


Broadband Terminated Vee antenna - A travelling wave antenna using 9:1 Ununs & a 50 ohm terminating load


Rotary Washing line antenna - Various antennas using hardware from scrap rotary washing lines


Washing line wire reel antenna - A cheap portable antenna


Low Band Wire Antennas - Which is the best ?


HF Antenna Switches - Remotely select a Doublet, Tee or Vertical - for use with a 100w tranceiver


Multiband Wire HF antennas - Thoughts on the G5RV and similar designs


Better than a G5RV - the ZS6BK / G0GSV multiband HF antenna  - External site


More information relating to ZS6BK antenna and matching section - External site


Baluns, Tuners & Matching

Audio & Processing

FM on the LF Bands  - How much spectrum does a Narrow Band FM transmission occupy


SSB TX audio equaliser - Published in Radcom February and March 2009


Build an audio Processor and clipper


Boom microphone for Yaesu FT-857 / FT-897 & Icom IC-7000 - modify a cheap PC headset


Modifying Clansman Military Headsets - use with Yaesu FT-857 FT-897 Icom IC-7000


FT-897D - Audio processing and ALC operation



EMC

Other Stuff


Older projects


All other miscellaneous projects can be found by clicking on this page link


Including:-

  • ‘Manhattan’ or 'New Amsterdam' Style construction
  • 40m Antenna Shootout
  • Switched X dipole / Vee Beam
  • Christmas Light - Vertical Antenna


Other items have now been moved to separate pages