On this site:

Onno's Electronics Page

What's new (highlights)?
2026-04-17 Updated ELV FC7008 counter
2026-04-11 Added Philips B5X74A plano radio
2026-03-14 Added Philips PE4801 regulated power supply
2026-03-14 Updated Philips PM5100 LF generator.
2026-03-08 Added Philips GM2315 LF generator
2026-01-16 Updated Philips GM2317 LF generator
2026-01-04 Added GM2885 Calibrating oscillator
2025-12-26 Added autoranging capacitance meter
2025-12-22 PM532O and PM5321 signal generators.
2025-12-14 Added Erres KY585 radio.
2025-12-04 Added Bush TR82C transistor portable.
2024-04-27 Updated Bush VHF81 after repair.
2015-03-08 Updated Guitar amp project page.
2015-01-31 Updated Bedrock 600 guitar combo page.
2012-06-18 Added Advance DVM1
2010-04-17 Added Elektorscope DIY scope
2007-01-13 Finished restoring second 667A
2004-07-07 Bemelman Nixieclock finished
2001-05-23 Added UM58 homebrew regen receiver

... ... Complete change history.

This website is there to share my fascination for 20th century electronics technology. When I was young, I became an electronics hobbyist. I found it truly fascinating to understand, build and fix radios, amplifiers, color TV's and measuring instruments yourself. These were like magic objects. Since, electronic devices have become smaller and increasingly difficult to change or repair. Still, even modern electronics can be analysed and often fixed.

A lot of these pages are about obsolete electronics that glow in the dark. That made them look like magic objects. Old equipment using thermionic valves or gas discharge tubes that produce light and heat. Maybe they are too large, or too unsophisticated for today. Even if they may look rough and primitive today, they are technological achievements of their time. Some are complex and intricate and sometimes hard to understand if you do not have the knowledge. That is what makes them interesting. Read on and enjoy.

The site has five chapters: one nice valve
Valve Veneration
Read about radios, scopes and other old-days electronic equipment, based upon Thermionic Valves (or call them Electron Tubes if you like).
Neon Nostalgia
Covering nixies and other neon tubes, electronic devices that depend on ionised gas to function. There are also references to neon display resources. On a separate page How To Drive Nixies, I'll discuss the principles for nixie driving circuits.
Intricate Instruments
Electronic measuring instruments are the tools of the trade for any electronic engineer. I have collected a number of mostly old instruments to use and to admire their ingenuity.
Projects Page
Clicking on the "projects" link will bring you descriptions of some electronics projects that I built.
Odds & Ends
Finally, under "Odds & Ends" you will find stories of some other repairs etc, etc, etc.

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