Home » Archive by category 'SB-221'
  admin - June - 12 - 2017 - Comments Off on Adding the Ameritron AL-80B to the shack

The VA7ST station has a new contesting amplifier — the Ameritron AL-80BX joins a pair of SB-221 amplifiers for high-power operation.

  admin - May - 9 - 2016 - Comments Off on Heathkit SB-221 brought back to life

An overview of my SB-221 amplifier repair project — a notebook about what it needed and what I did.

Propagation Now

Time of latest WWV report Solar flux index -- from SWPC WWV.txt Day's sunspot count -- from SWPC dayind.txt Current A-index -- from SWPC curind.txt Curren K-index -- from SWPC curind.txt Geomagnetic condition based on current A-index and K-index levels GOES 14 Solar X-ray flux -- A or B is good, C M or X is not good Calculated band conditions based on +/- points awarded for latest: A-index, Aurora level, X-ray flux, Solar Flux Index, and typical utility of each band group during hours of daylight or darkness Latest OVATION-prime aurora forecast images K-index (3-hour readings from Boulder, CO) for the past 24 hours Solar Flux and Sunspots for the past 14 days Developed for the Orca DX and Contest Club by VA7ST
Use Control-F5 for latest image