The Cathode Ray Tube site
History and Physics Instruments
Artifacts from the last CRT factory in Europe
On this page are artifacts from the CRT factory in Heerlen, generously donated to
me in order to save them for the future. Here you see several prototype or
engineering samples CRTs from the last half century. Most of them went into production.
Besides that I found educational components which show the building of the tube
and gun system and other interesting stuff.
Huge collection of electron guns made in the Heerlen CRT factory.
Many of them carry the type of the CRT were these are used in, some dated.
First tube made in the Philips factory in Heerlen.
These tubes came from the display cabinet in the factory and are
engineering samples or prototype tubes.
They are generously donated to the CRT site.
To the left; the first tube made in the Heerlen (Philips) factory (as told)
It's a DG16-1, this type was made as early as 1937.
To the right; the factory produced more than one million CRT's
on 16-6-1995. Employees made this 1.000.001 example for display.
Below; a tube from the last produced batch special for the Cathode
Ray Tube site. A second tube was given to Frank-Philipse for his effort
to save all CRT documentation.
Last produced PDA CRT in Europe a D14-376GH/123 with serial# The Last One
Two 12 cm TV projection tubes.
The tube in the front is an engineering sample of the NatLab. A 20MW13, 50 KV tube with magnetic deflection. The blue tube in the back looks like a more modern copy and wears the number MW9469 (hand written) but is probably the MW13-38. The blue paint was used as a substitute for the normal outside graphite layer in the testing process to prevent electrical shocks.
Collection of small CRTs some with crude made glass cones.
All unsigned. To the left a flying spot scanner tube, most likely the Q7-100GU.
Here a memory CRT L14-150GH/93.
CRT from the 1970's a time before digital memory.
The tube looks transparent because they used a layer of tin-oxide to prevent the risk of spilling aquadag graphite on the expensive screen inside.
This large memory tube was called a helix tube, no details known.
The tube has a small 6x8cm active screen.
A couple of medium sized tubes. A standing "demonstration" tube 15D7GH. To the left an unknown 7cm tube, to the right a D7-222GY.
An engineering sample 202D12GH/109
This is a first attempt of a dual gun tube with acceleration spiral. It's is a bulky experimental model for the E10-126P which has a much more slim design. It didn't pass for production due to it's size.
Engineering model of the D18-120GH with an extended cone melted on a standard 12cm cone. The inside is aluminized.
Engineering model of a 10cm faceplate CRT made out of flat float glass.
Type unknown but there seems to be a production of it.
The tube is very crude made probably the first attempt.
Approved for production 17-10-1969
Display materials and other interesting stuff
Samples activated phosphor with UV light.
From left to right; GH(P31) - YA - BE(P11) - WE(P45)
These small pots filled with phosphors were used in a dark room to compare the screens of test tubes with these samples as a reference.
Exploded view of the most modern PDA (post deflection acceleration) electron gun with a dome-mesh used in scopes above 40Mhz up to 100Mhz. The 4µm nickel mesh containing 30µm holes gives an extra acceleration to the electron beam in order to produce enough light on the screen at high frequencies.
Monitor inline triple gun for CRT with magnetic deflection.
Exploded view of the Mono gun used in less complicated CRTs.
The glass process preparing the cone in three steps.
After adding the neck and graticule faceplate its getting the new name "balloon" the next steps in completing.
Balloon with phosphor, aquadag layer and aluminized.(dome-mesh)
Balloon with aquadag layer
and phosphor. (dome-mesh)
Balloon with aquadag layer
and phosphor. (mono type)
The following step is fitting the electron gun, evacuating and sealing process. Now the tube is ready for check and alignment.
Here the neck, graticule screen, and the lead enamel seals
used to melt the neck and front glass to the cone.
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