Category: Blog

Home / Blog
Post

Rental Automobile Dubai: Every Thing You Need to Know About

Introduction Renting a automobile in Dubai can provide a convenient and flexible method to discover this vibrant city and its surrounding areas. With a plethora of rental automobile companies to choose from, it’s essential to understand the ins and outs of renting a automotive in Dubai to make sure a easy and hassle-free experience. In...

An Audion By British Thomson-Houston?
Post

An Audion By British Thomson-Houston?

This author has scanned all the magazines that appear on this website and many had very intersting articles like this one that Fin Stewart submitted in Vol. 14, No 2, April, 2012. Fin Stewart quote: “I picked up a mint copy of the book: BTH, Reminiscences – Sixty Years of Progress published in 1946, and...

Diodes From the Twenties
Post

Diodes From the Twenties

John Fleming, working for the Marconi Wireless Telegraph Co. in London and was the first to experiment with the Edison Effect light bulb. Some of the 2nd generation Fleming valves were tubular and were mounted in what became known as the “Gallows Type”. Third and fourth generation Fleming valves took on the shape of English...

Vacuum Tubes That Went to Court
Post

Vacuum Tubes That Went to Court

This is a copy, with a few updates, that this author uploaded to groups.io on 2/2/2021. Hope it has some interest? This author, 15 years ago, attended an auction in New York City. While no old radios or vacuum tubes were mentioned, 1 lot did have several items that I had to purchase. The items...

D-Lux Blue Vacuum Tubes
Post

D-Lux Blue Vacuum Tubes

Very little information is available on the D-Lux Blue brand of tubes shown above. Serlin & Company, 129 Michigan Ave., Detroit, Michigan sold these UV-201-A tubes for just 2 months in 1925 in the Detroit Free Press newspaper. They resemble the Brightson True Blue brand very closely in diameter of glass bulb, blue color, and...

Moorhead Companies Tube Contributions: 1915-1925
Post

Moorhead Companies Tube Contributions: 1915-1925

While this article is a re-do of a previous work, it has never appeared in either the old TCA magazine or on this website. It is not the complete line Otis Moorhead offered, but it represents a good deal of his product line. All tubes reside in the Joe Gruber collection. Click on the pictures...

DeForest Notes
Post

DeForest Notes

June, 1912 – February, 1914 These documents appeared in Vol., 19, #2, April 2017 of the TCA magazine. Forward was written by Ludwell Sibley shown below. There are too many pages to present here in any other form other than a hyperlink here: DFN In the same group of scans I did at Jerry Vanicek’s...

John Hays Hammond Jr. Torpedo Relay Tube
Post

John Hays Hammond Jr. Torpedo Relay Tube

Forward This article first appeared in the TCA magazine numbered Vol. 18, No. 2, April, 2016. Since that writing, I have, mostly by accident, found much more information on Hammond and will be expanding the original. First, I will copy the article as it appeared and after I will add the additional newly found facts...