Frank's Electron tube Pages
updated: 050219	Supplemental stuff

Most items from this page have been moved to the 'electron Tube Data sheets' mirror sites. Go to one of the mirror sites and select 'more' in the upper right corner of the index pages.

some tube related stuff
Simple and yet good (to my opinion) Tone Control Circuit.
Amplifier circuit using 2x PX4 (=PP3-250). It's the LF and power-supply part of my RGD radio. Picture 1 Picture 2
Experimental RIAA pre amplifier I once designed. Gain is 30dB @ 1kHz. The circuit seems to work very well but I never used it yet.
The first Philips tube called IDEEZET. It was made in 1917. Photo from NVHR.
A Philips advertisement from 1928. It says (my translation!): You will enjoy more and more relaxed, if you choose Philips products for your radio equipment.
This is my DIY VL1 output pentode. It worked very well! Found the real one later.
Found this in an old dictionary: vintage IC's. Note: 1 cm = 1 statF = 1.112650 pF.
The first Philips factory (1891). Part of it still exists. Eindhoven, the Netherlands.
Yes! At my work, I designed a tube in a modern 'industrial electronics' test unit. It's a Svetlana GP5 used as precision load (current source) to test a high voltage generator.
Very old Philips valves: Type C, D and F.
If there are still some Futurenet users out there: here's a library with some tubes. (binary file)
Photo of old tubes: Philips AA2 & D1.
How tubes work. This is from my first book about electronics. I got it at my 9th birthday.
Now this is a calculator! Part of IBM EDPM
The oldest known electron tubes! Circuit found in Dendera, Egypt.
Commonly used Philips resistors. 1966

off topic
The background of the front page is not where I live. It's the home of Lara Croft in the game Tombraider. I like the game and I think it's a nice background picture for the front page.
Some other things i'm interested in: I found the Pillars of Hercules and the purpose of the pyramids.
Some photos from the area where we live.
Some software I wrote....