There's been a bit of a delay on this blog. But I'm back and starting to work on my posting about Mastering the Code. Take a look at this page from the July 1933 issue of Radio magazine.  Down the left side of the page are some classified ads. Right above the Ohmite ad is an ad for 1933 Wallace Short Wave Manuals. I own a 1936 printing of this manual and I'm going to tell you about mastering the code from an article in that book written by Don C. Wallace, W6AM.  This book is one of the treasures in my ham radio library. I don't know anyone else who has a copy of this 128 page book. I have searched on the Internet and so far have not found another copy, though I did find a mention of the book. Don Wallace is my hero in ham radio. He was one of the most famous hams in the world for a very long time, and for good reason. When I lived in Los Angeles in the early 1980's, I became a member of the Southern California DX Club. The biggest perk of joining that club was being able to meet the great Don Wallace, who was also a member of the club. Decades earlier in his Short Wave Manual he wrote a four page article on How to Master the Radio-Telegraph Code.   I will tell you about that in detail in my Mastering the Code article.