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- Four blue tubes acquired recently
Figs. 1 and 2 shows a UV 01A Royal Blue Laboratories tube, made in Newark, New Jersey starting in 1926. It has a S-18 bulb shape but otherwise made somewhat like a Brightson, with a mottled maroon colored base. Inked on the base are just enough letters, about half, to prove it is in fact… - Double Exposure of the Marconi Room on the Titanic Repaired!
The before repair picture above is the un- cropped double exposure taken by amateur photographer Father Francis Browne on April, 12th, 1912 and was just one of a good number of photos taken on his journey from Liverpool, where he was studying to become a Catholic priest. From Liverpool he would travel by rail to… - Locked Door Tube Factories
I present this article, every so often, to remind vacuum tube collectors what the business was like, in the early 20’s, after WW1 for the powers that be to enforce their patent rights. Patents are only as good as your policing of them. This article appeared in the November, 1924 issue of “Radio” magazine. - Early Wireless
This postcard was conceived by prominent artist Charles Allen Gilbert (1873-1929) around 1909 and his female subjects called “Gilbert Girls” appeared in hundreds of magazines, etc., around the country. I have seen this same subject in a full-sized framed calendar as well with smaller tear-off days and months at the bottom for the year 1910…. - Marconi Catalog with Fleming Valves
The Marconi catalog above is without a doubt the most accurate and finest scan of the original that can be had. Prominent Marconi collectors, Felicia and Jim Kreuzer, provided the front and rear cover and answered many questions as to what was in between, meaning the pages that are blank. As can be seen, the…