Modulators And Drivers

[pwdrive]

You can check out Ham shortwave live on any of the web SDR sites, the UK's Hack Green is a good one to start with, try the 40 meter band on that site, plenty of activity this time of night, you will need to select lower side band mode, tune by dragging the cursor then fine tune with the +- buttons, the waterfall display will show where abouts in the band the current transmission are, it might take a while to master it at first but it's easy after a while:

http://hackgreensdr.org:8901/

Hams below 10MHz are on lower sideband (LSB) and above 10MHz on upper sideband (USB)

Shanwick, Volmet etc will be on upper side band even though they may be below 10MHz

Lawrence.