Suppliers
Rapid OnLine
Langrex Valves( etc.)
BA Nuts & Bolts
Radio Spares
Mouser
Farnell
QRP Labs
eBay
g3sxh - links
WSPR
Propogation
hf propogation
space weather - UK
space weather - US
WSPRnet spots
m0xdk map
vk7jj wspr maps
K1JT WSPR
kb9amg - g3sxh-2way reports
kb9amg - g3sxh-RX reports
kb9amg - g3sxh-TX Spots
RSGB DX Cluster
Ultimate Kits
G4ILO (USB Link)
dj2ls rf heat map
Calculators
Resonant Frequency
66 Pacific On Line
LeLeivre -Attenuators
Watts to dB
Passive Filters
AA5TB Loop Antenna
Antennas
KG4ZOW Moxon Design Calculator
ON5AU Moxon
ADS-B DIY Antenna
M0UKD Slim Jim Calculator
YO3DAC Wire Antennas
pa3hcm 5/8 lambda
Radio Shops
etc
The Valve Museum (data, equivalents, CV nos)
Signal Identification Guide
FDM User Manual
QRZ.com
eHam.net
Ofcom
RSGB
ARRL
Nevada
Waters and Stanton
Martyn Lynch
Moonraker
Francis Kay Vintage
Pi Hut
Currys PC World
eBay