Thordarson Christmas Advertisement
December 1929 QST

December 1929 QST

Table of Contents

Wax nostalgic about and learn from the history of early electronics. See articles from QST, published December 1915 - present (visit ARRL for info). All copyrights hereby acknowledged.

Transformer Core Lamination Configurations

This advertisement from Thordarson is from one of my oldest editions of the American Radio Relay League's QST magazine - December 1929. Thordarson Electric Manufacturing Company was founded in Chicago, Illinois, by Chester H. Thordarson in 1895. He was the first producer of industrial and commercial transformers. They are still in business today. Thordarson patented more than 30 inventions for transformer design and manufacturing back in its early days, including the still most popular form of laminations, the scrapless "E and I." Many discussions are available on various transformer lamination configurations, including the very common "E and I" types.

Thordarson Advertisement

"Yes son - I told St. Nick to bring you all the Thordarson equipment you needed to build your new station -and there it is ~ Merry Xmas"

Thordarson Electric Mfg. Company

500 West Huron Street

Corner Kingsbury

Chicago, Ill.

Here are a few other Christmas-related items on RF Cafe:

Thordarson Christmas Advertisement - December 1929
National Company Christmas and Happy New Year - January 1942
Hallicrafters - A Good Old Fashioned Christmas - January 1942
National Company Christmas and New Year Greeting - January 1941
Amateur Radio Christmas Comics - January 1942 QST
Jensen Radio Advertisement - January 1945 Radio News
E. F. Johnson Christmas Ad - December 1953 QST
Hallicrafters Ad: A Message for Christmas - January 1941 QST
A Christmastide Muddle - January 1930 Radio-Craft
Thordarson Christmas Advertisement - December 1929 QST
Norelco Advertisement - April 1957 Radio & TV News
How Christmas Came to S. McSquegg - December 1953 QST
Mac's Radio Service Shop: A Breathing Spell - January 1955 Radio & Television News
"Merry Christmas" from the Staff - December 1958 Radio-Electronics
Kenyon Transformer Holiday Message - January 1941 QST
Carl and Jerry: Under the Mistletoe - December 1958 Popular Electronics
The Day Before Christmas - December 1958 Radio-Electronics
The Telephone News - Bell Telephone, December 1958
Hallicrafters Ad: Good Old Fashioned Christmas - January 1942 QST
Terminal Radio Corp. Christmas and New Year Greeting - January 1941 QST
National Company: Merry Christmas and Happy New Year - January 1942 QST
National Company: Merry Christmas and Happy New Year - January 1941 QST
What Happens When Engineers Think Too Much About Christmas
Politically Correct "The 12 Days of Christmas"
"12 Days of Christmas" Memo

SATNow Satellite Industry Resources Database - RF Cafe Website

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...