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In Reply to: RE: Cetron 7236 posted by gvvt on January 20, 2009 at 19:44:50
At least if you are into the history behind vacuum tube production, as I am. The below outlines the history of that company AND answers your question - YES - Cetron bought many Tung-Sol tube lines, including the 7236.
• 1927 O.T. Mcllvance Leaves GE And Starts Continental Electric
Co., With His Brother H.A., In The Old Geneva Organ Co. Building (Richardson Still Uses This Building Today To Store & Test Tubes)
• 1941 – 1945 Continental Electric Builds Tubes For WW II
- Phototubes
- Thyratrons
- Rectifiers
• 1947 – Richardson Electronics, Ltd. Is Formed By Art Richardson Sr.
• 1949 – Disgruntled Engineers R. Hutchings & L. Prevost Leave
Continental to Form National Electronics
• 1955 Continental Starts Selling Products Other Than Vacuum Tubes
1958 – Continental Incorporates Taylor Tubes of Chicago - The Start
Of Building Power Grid Tubes like 805, 810, 845, 8000 etc....
• 1962 - Continental Phased Out Production Of CRT's and Non-Tube Products Tubes For WW II
• R. Packard Purchase Controlling Interest And Change The Company
Name To: CETRON ELECTRONICS
• 1972 - Cetron Starts Building 300B
• 1975 - Cetron Acquires Bloomfield Electronics And
Tung-Sol Tube Types 6336, 6384, 6528 etc...
• Cetron Focuses On T&R, Power Grid Types For U.S.
Government Contracts
• 1979 – Cetron Acquires RCA Photo Tube Production Line
• 1980 - 1981 Richardson Electronics-Concerned That Tube Manufactures Are Exiting The Business – Acquires National And Cetron In Order To Maintain A On Going Supply Of tubes For Their Customers
• 1982 – 1986 Richardson Consolidates The Cetron & National Plants
• Acquires Additional Tube Types From GE, RCA And Westinghouse
• Continues To Supply Tubes To U.S. Government
• Starts to Supply Western Electric Tubes
• 1988 – Acquires Production Equipment From Western Electric
• 1987 up to present Richardson Electronics Continues To Produce Tubes And Has Expanded Product Offerings In solid State Devices And
Security Systems
Note the last item - Richardson Electronics continues to manufacture tubes - although I don't think the LaFox Illinois based company is making them in the USA...they are getting Russian tubes and branding them Narional Electronics, since they own the brand. But you CAN buy tubes from them, even today!
Rob"Let there be songs, to fill the air"
Follow Ups:
Thanks. I'm pretty much a complete idiot about electronics, but I'm fascinated by tubes, and I'm planning to start soldering stuff soon.
That sort of answers my question. Does "acquiring" a tube type imply that Cetron's standards were more or less equivalent to Tung-Sol's? (I ask because of the things one reads about the material differences in JJ vs Tesla, or the New Sensor "Mullards," etc.)
If you don't mind sucking me a little deeper into all this, could you explain the Cetron codes?
Reading around the metal base:
7236 / Made in U.S.A. 105 A 72241 / 8049
I'm guessing 105 is a manufacturer code, but I can't find it listed anywhere.
Is 72241 the date code with a shift number, or is 8049 the date code?
In either case, did the quality of the Cetron remain near the level of the Tung-Sol, which I understand from all the sales pitches, was the best?
Thanks
You can still order some very interesting NOS tubes directly from Richardson Electronics - I just did ;)
Rob"Let there be songs, to fill the air"
Thanks - that does look interesting.
Golly, tube rolling is fun.
I cannot answer some of those questions, hopefully someone else can, but I have some Cetron tubes which I think are very good. USA-manufactured Cetron tubes are of higher quality than the current "Tung-Sol" branded Russian tubes that New Sensor corp makes - this is not the same thing.
Rob"Let there be songs, to fill the air"
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