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Hans Walraven, Netherlands - Tube collection

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ID = 34647
Photo Hans Walraven

Below you find a part of the tube collection Hans Walraven.

My field is test equipment, especially Philips oscilloscopes.
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Excerpt from the tube collection of Hans Walraven. These images (tube photos) were uploaded to the respective tubes or valves by Hans Walraven.

probably experimental ECH41 with pum stem at the bottom and handwritten label
ECH41 1947
Common type Europe tube/semi... EU

Tube collector page of valve collector Hans Walraven as «own HP at RMorg»
As a member of Hans Walraven displays items in his/her tube collection. Tubes are called valves in British oriented countries.
Valve and tube collectors as well as radio collectors are invited to join Every member can display separate collections of tubes, radios etc.

Hans Walraven started his/her tube collection (valve collection) here on 03.Jun.2024. [index-en]


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