Hi All,
I'm currently updating the site in order to make it easier to maintain.
So please excuse any formatting errors whilst I'm implementing changes.
I hope you can still find the information you are looking for.
Note that due to the popularity of the site, it may occasionally exceed bandwidth quotas.
In future any updates will be featured on the new blog page.
Regards,
Martin - G8JNJ
Details of my Amateur radio activites can be found by clicking on this link
All current projects can be found by clicking on this link
G8JNJ Broadband HF Vertical Antenna - Requires no tuner
Broadband Vertical antennas & the Comet CHA-250B
M3KXZ no-counterpoise antenna - Does it actually work ?
Slinky antennas - Compact antennas made from Slinky toys may be proor performers
Portable Vee Dipole - Uses fishing poles and a lighting tripod
1m HF loop antenna - Uses a novel hinged plate tuning capacitor
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
Multiband Wire HF antennas - Thoughts on the G5RV and similar designs
Low Band Wire Antennas - Which is best
HF Antenna Switches - Remotely select a Doublet, Tee or Vertical for use with your 100w tranceiver
Better than a G5RV - the ZS6BK / G0GSV multiband HF antenna - External site
More information relating to ZS6BK antenna and matching section - External site
The best source of HF antenna information - Cebik - External site
Problems with broadband transformers using Iron Powder Cores
6:1 Unun construction - Similar to Comet CHA 250 matching unit
Using Auto-Tuners - Some general information, Hints & Tips
General notes on Balun performance and construction
Baluns that actually work - a few turns of coax don't - use a kg of ferrite - External site
Useful notes on the selection of ferrite materials - External site
Design for remote antenna switch for use with ZS6BK antenna - External site
SSB TX audio equaliser - Originally published in the February and March 2009 issues of Radcom
Build an audio Processor and clipper
Boom microphone for Yaesu FT-857 / FT-897 & Icom IC-7000 - modify a cheap PC headset
FT-897D - Audio processing and ALC operation
WSPR - personal beacon reporting system
Goldwave - Sound editing and analysis
Audacity - Sound editing software
Spectrum Lab - Audio analyser and more
Scanner recorder - Simple VOX triggered audio recorder
EZNEC antenna modeling software
Reg Edwards antenna design programs
Elsie - LC Filter design software
Ring core inductance calculator
Milmega - Desktop RF calculator
Allsorts of RF calculators
See eham for my reviews of:-
Autek Research VA1 Vector RX Analyst
Array Solutions AIM 4170 by W5BIG
Elad SNA-2550 2.5 GHz Scalar Network Analyzer
Ham Radio Deluxe - Superb free control and logging software
Spectran HF-6080 - Low cost spectrum analyser
Spiderbeam 18m telescopic pole
W4RT OBP Module with Heil HC-4 & HC-5 mic capsules
W4RT One Plug Filter – 2.3KHz Collins mechanical filter board
W6ELProp - propagation prediction software
Yaesu FT-897D HF and VHF /UHF Tranceiver