18 February 2017

Raytheon 2051 Thyratron vacuum test

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The WikiPedia page about Thyratrons mentions that they contain some gas. Either neon, argon, mercury or xenon. This means that the tube can ...
15 February 2017

Tektronix 7A13 plugin ... fixed!

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Contary with what I stated in the previous post, I tried to fix the 7A13 plugin. I couldn't leave a burned capacitor in there. Mess...
11 February 2017

Small change in HP 5082-7300 clock firmware

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The picture doesn't show "3" is weaker. I always feel awkward when I flash a new firmware in a clock. That was the case ag...
06 February 2017

Tektronix 7A13 module on fire (almost)

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I spotted it in a drawer, so I tried to plug a 7A13 input module into my Tek oscilloscope chassis. In less than 10 seconds on the CRT a brig...
28 January 2017

Arduino Nixie voltage booster: 12 V to 200 V

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Nixie PSU kits are cheap and robust, but sometimes they can be "too much" for a project: too big, too costly, too powerful . It i...
12 January 2017

From Eagle to KiCad

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For Xmas 2016 I gave myself a little time to test KiCad as a replacement of Eagle. Even if I used it for very few hours, I could not get t...
09 January 2017

Nixie Tube Ciapapuer - 3 - final firmware

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Lately I have pushed to github a new version of the Nixie Tube Ciapapuer firmware . The main change lies in the way the random number gene...
03 January 2017

Ham calls in a stationery store

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I was walking in the neighborhood this afternoon and at the stationer's shop window I saw these bags: They show supposedly U.S. van...