My name is Jan. Most of the info here is about valves or tubes, tube audio and whatever is fun. Keep these lovely glowing things alive!

Feel free to have a look around this part of my homepages. You will find information about tube equipment I have designed and built over the time. I have been into homebrewing tube equipment since the 60's.

If you would like to try building tube stuff yourself, you must be aware of the lethal voltages in equipments like these. If you have no experience or education please stay away from this or at least have a skilled mentor to help you.