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A recent edition of the ARRL Contest Update highlighted the availability of this shirt with the number 73 on it. Since this shirt is offered by Think Geek, I figured it had to be ham radio related. After all, we own the number 73! See my previous posting on the topic.

Well, it turns out that this shirt is actually derived from The Big Bang Theory television show, when Sheldon explains that 73 is The Best Number.

Check out this video clip:

Well, it doesn’t stop there. Using my friend Google, I found a number of web pages on the topic of the number 73. Wikipedia even has a page dedicated to it. (Who edits a Wikipedia page about a number anyway?)

Here are some fun facts about 73:

• 73 is the 21st prime number
• Reversing the digits of 73, produces another prime number, 37, which means 73 is an Emirp
• The PT boat in the television show McHale’s Navy was PT-73.
• In Morse code, 73 is a palindrome

But to me, 73 is still just Best Regards.

73, Bob K0NR

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