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Apco Manufacturing Company, Providence took over the Auto Parts Company of Providence on June 1st 1917 with the capitalization of the new company of $200,000 as compared to the $30,000 of the Auto Parts Company. 1

Apco itself was started 8 years earlier by Thomas F Wilson with it's main business being a large line of specialties for Ford cars.

The 1921 3 and 1924 4 Providence House Directories list Apco's address at 1200 Eddy St. In 1924 there were two trademarks granted to Apco for Battery Charges (193,794 - May 17th), Current Rectifiers (204,580 - December 30th) 2 and Battery CHargers (187,885 - August 12th) 8 In the 1925 Rhode Island Radio Fan's handbook, Apco was listed as making Battery Chargers and Apco Rectodyne, a radio battery eliminator.

In 1927 the company merged with the Frank Mossberg Company (Founded in 1899), a maker of automotive specialty tools, becoming Apco Mossberg which is still in businees today.

APCO plant in Providence. 1926

APCO Twin Tube

The Apco Twin tube was produced by the Apco Manufacturing Co. of Providence, Rhode Island, ca. 1925 5 . We see mention of the tube in a a Radio Broadcast article in July 1926 7 and in an article on new products in August of the same year. 6 .


Apco Twin Tube
From the collection of
Bill's Vintage Tube Site


Bill Condon's discription of the Twin tube is: "The Apco Twin has a single triode section but uses an "M" style filament that is center-tapped. Metal tabs on the base allow selection of either half of the filament, or both halves at once. Using one half resulted in '01A performance. If both halves were used at once, the tube could be used as an output tube."

Then in the "Saga of the Vacuum Tube" book the discription says: "The Apco Twin Tube was made by the Apco Manufacturing Company of Providence, Rhode Island, in the period 1925-1926. It contained two complete sets of 201A-type elements. These were connected in parallel ex-cept for one end of each filament. When the first filament failed, the second one could be brought into service by slightly unscrewing one of the filament prongs so that a switch arm could be moved from one contact to another. This brought the second filament into the circuit. Each filament took 0.25 ampere at 5 volts. The base was of the UX type and the only identification on the tube was an oval black paper label on the glass bulb with the words "Apco Twin Tube." At the left of the trade name "5 volt" and to the right ".25-amp" were printed—all in dark red on the black label."

So it looks like there were two versions of the APCO Twin tube.



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The Antique Wireless Association Old Timers Bulletin, June 1974.


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APCO Twin Tube, 1925-1926

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APCO Twin Tube, 1925-1926

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APCO Twin Tube, 1925-1926

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St Louis Post-Dispatch
November 21, 1926

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Radio Broadcast, August, 1926.


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Radio-Broadcast
October 1926


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The Philadelphia Inquirer
July 4, 1926






Products


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Apco Automatic A-Battery Charger, 1928

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24/48 Volt Battery Charger, 1924-1926

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24/48 Volt Battery Charger, 1924-1926

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Apco Manufacturing Company, Providence
This is the Apco Recodyne or "B" Battery Eliminator.

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Apco Manufacturing Company, Providence
This is the Apco Simplex Vernier Dial
No 73

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Apco Manufacturing Company, Providence
This is the Apco Simplex Vernier Dial
No 73

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Apco Manufacturing Company, Providence
This is another Apco Vernier Dial
Unmarked but the same type pointer
as the one above.

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Apco Manufacturing Company, Providence
Automotive Spark Coil

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Apco Manufacturing Company, Providence
Automotive Spark Coil

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Apco Manufacturing Company, Providence
This is the Apco Vernier Dial
Courtesy of "clueless".

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Apco Manufacturing Company, Providence
Automotive Spark Coil Ad

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Home Brew Crystal Set
With Apco Dial.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
Apco 6 Volt Battery Charger Instruction Manual
77A, 77C, 77F.

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Apco Manufacturing Company, Providence
Apco Battery Charger 88-B.

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Apco Manufacturing Company, Providence
Apco Battery Charger 88-B.

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Apco Manufacturing Company, Providence
Apco Battery Charger 88-B.

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Apco Manufacturing Company, Providence
Apco Battery Charger 88-B.

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Apco Manufacturing Company, Providence
Apco Battery Charger 88-B.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Products Phamplet.

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Apco Manufacturing Company, Providence
Apco Fully Automatic "A"
Battery Converter Phamplet.

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Apco Manufacturing Company, Providence
Apco Fully Automatic "A"
Battery Converter Phamplet.

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Apco Manufacturing Company, Providence
Apco Battery Charger Phamplet.

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Apco Manufacturing Company, Providence
Apco Battery Charger Phamplet.

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Apco Manufacturing Company, Providence
Apco 6 Volt Battery Charger Instruction Manual
77A, 77C, 77F.

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Apco Manufacturing Company, Providence
This is the Apco 6 Volt Battery Charger.

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Apco Manufacturing Company, Providence
Apco 6 Volt Battery Charger Instruction Manual
77A, 77C, 77F.


Ads


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The Evening News, January 29th 1926.

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B & H Supply Company
Catalog No 26
Providence, RI
Spring 1924.


The Brooklyn Eagle, September, 1925.


Radio World, September 1926.


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Boys Life, October, 1925.


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The Winnipeg Tribune
September 18th, 1928.


The Brooklyn Daily Eagle
December 21st 1924.


Reading Times October 29th, 1926.


Harrisburg Sunday Courier
March 7th, 1926.


The Warren Tribune
September 16th, 1927.


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Chicago Tribune
October 10 1926.


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The Philadelphia Inquirer
September 12, 1926.


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The Philadelphia Inquirer
September 12, 1926

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Radio News, February, 1927.


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Randolph Radio Corp, Catalog 1927.

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Prescott Evening Courier
March 10, 1926.


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Radio News, Janurary, 1925.


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Popular Mechanics, November, 1924.

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Radio News, October, 1924.

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Radio News, September, 1924.

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Radio Broadcast, April, 1925.

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Radio News, August, 1925.

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Popular Mechanics, December, 1924.

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New York Sun, WedJanuary, 1925.

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Radio Listeners Guide, December, 1928.

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citizens Radio Call Book, Fall, 1924.

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citizens Radio Call Book, Spring, 1926.

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Harrisburg Telegraph
March 15th 1924.

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Harrisburg Telegraph
March 5th 1924.

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Suburbanite Economist
October 18th 1927.

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The Evening Herald
March 10th 1926.

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Radio Broadcast
September 1925.

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Citizens Radio Call Book
Spring 1925.

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Citizens Radio Call Book
Spring 1926.

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The Scranton Republican
April 11th 1924.

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Popular Radio
December 1924.


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Radio Engineering, August 1927.

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Radio Age, August, 1925.

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Radio Broadcast, November, 1926.

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The Ogden Standard Examiner
January 31st 1926.

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Radio In The Home, August, 1924.

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Radio Broadcast, August, 1926.


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Radio Engineering, August 1927.

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Automoblie Dealer and Repairer, November, 1919.

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Automoblie Dealer and Repairer, January, 1920.

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Radio Retailing
February 1927.

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Apco, 1919 Ad.

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Radio and Trade Journal, August, 1925.

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The Accessory & Garage Journal, 1914.

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The Brooklyn Daily Eagle
October 21st, 1926

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The Brooklyn Daily Eagle
January 7th, 1925.

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Arizona Republic
December 21 1927.

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Radio-Broadcast
October 1926


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St Louis Post-Dispatch
November 22 1925


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Detroit Free Press
January 7 1925


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Hartford Courant
October 13, 1926



1 Hardware Review, June, 1917

2 Index of Patents Issued From the United States Patent Office, 1924

3 1921 Providence House Directory

4 1924 Providence House Directory

5 The Multivalve Tube and its Applications

6 Radio Broadcast August 1926

7 Radio Broadcast July 1926

8 Index of Patents Issued From the United States Patent Office, 1924