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  1. bertus

    Sign out, log out, ending my session?

    Hello, Delete the cookies of your browser. That will also delete the "remember me" cookie. Bertus
  2. bertus

    Strange old capacitor

    Hello, Electectrolitic capacitors may dry out over time and loose a lot of their capacity. It is hard to tell what type of capacitor you have on the pictures. The capsite can tell you more about capacitors: https://iequalscdvdt.com/ Bertus
  3. bertus

    Strange old capacitor

    Hello, For higher voltage capacitors, you could have a look at this site: http://www.askjanfirst.com/eindex.htm?/ekatalog.htm Bertus
  4. bertus

    Strange old capacitor

    Hello, It looks like a triple capacitor. It consists of 2 capacitors of 12 uF 450 volts and one capacitor of 16 uF 50 volts. Bertus
  5. bertus

    Sign out, log out, ending my session?

    Hello, I do not know where the servers are located. I do know they use cloudflare to have fast access from all countries over the world. Only @eerob knows where the servers are located, as he does all the technical stuff of the websites of the group. Bertus
  6. bertus

    Sign out, log out, ending my session?

    Hello, Indeed, there has been a change. The forum has been merged with an other electronics forum. The owner will make an official announcement soon. Bertus
  7. bertus

    No reset button found in 4G LTE Mobile WiFi Modem

    Hello, What is the black thing on the modem? Bertus
  8. bertus

    No reset button found in 4G LTE Mobile WiFi Modem

    Does this help:
  9. bertus

    OLD Tektronix Oscilloscope Identification

    Hello, The one you show seems to be a rack version of this one: https://w140.com/tekwiki/wiki/531 The rack version seems to be called RM31. Bertus
  10. bertus

    How do I run a 24VAC solenoid off of a couple of 9V's?

    Old thread. Locked.
  11. bertus

    Audio amp modification

    Hello, The filtering must be done in the circuit before the one you shared. The amplifier circuits look equal. Bertus
  12. bertus

    Artificial Intelligence---What is the Hardware Behind it?

    Hello, Have a look at the following page: https://www.supermicro.com/en/glossary/ai-hardware Bertus
  13. bertus

    Thought for the day ....

  14. bertus

    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Hello, I assume so, as they are stated as open source. Bertus
  15. bertus

    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Hello, The internet archive has some books on the arduino. From beginner books to very advanced books: https://archive.org/search?query=opensource+arduino&and%5B%5D=mediatype%3A%22texts%22&and%5B%5D=language%3A%22English%22 Bertus
  16. bertus

    Math Severity as applied to Serious Electronics

    Hello, Worldradiohistory has a bookshelf full of old books: https://www.worldradiohistory.com/Home-Book.htm Bertus
  17. bertus

    Math Severity as applied to Serious Electronics

    Hello, Yes, there are more books available over there: https://archive.org/details/opensource?tab=collection&query=electronics&and%5B%5D=language%3A%22English%22 A well known series is from neets: https://archive.org/details/neetsmodules_202003/NEETS%20MOD%201%20NAVEDTRA%2014173A/mode/1up Bertus
  18. bertus

    Math Severity as applied to Serious Electronics

    Hello, This booklet is a nice reference, with a lot of formulas used in electronics: https://archive.org/details/analog_engineers_pocket_reference Bertus
  19. bertus

    garage door opener 2

    This is a follow up from this old thread: https://maker.pro/forums/threads/garage-door-opener.290346/ Bertus
  20. bertus

    Comedy Thread

    https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Gernsback/Gernsback-Electronics-Comics.pdf
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