I was going to mention the Wireless Girl site but Steve, N4RM,
beat me to it! Lotsa stuff on that site that goes well beyond the
Viking II & CDC.
Check out the very indepth analysis of these rigs. There is an
investigation/debunking of mods that have been "out there" on the
net, and mods that Janice finally implemented.
The Viking II discussion on modulation also applies to various AM
transmitters. It is worth a read if you want to avoid destroying
your iron in just about any AM transmitter.? I blew up a mod
transformer on a Valiant years ago, never knowing why, and finally
found the answer here. Many tips to learn about here.
The CDC, in addition to the expanded coverage, has a really nice
fast-acting compression circuit not present in the Viking II. I
decided to leave that circuit unmodded - it works really well as
far as I'm concerned.
Check out the other topics on this site, quite a lot of info.
73 John KN3I
