If you worked the special event AM station at the FARfest (Gaithersburg) last month, you heard a Johnson Invader 2000 transmitter modified by Frank, KB3AHE. Not only did he fix the audio, make the thing transmit 'true AM' (a carrier and both sidebands), he also made it much more stable and easy operate. Well, now Frank has shared his knowledge on this rig with a mondo-mega write-up with info on all the mods.
Check them out on The AM Window Web Site.
http://www.amwindow.org/tech/htm/invader2000.htm