Radiometer Copenhagen OSG 42b Oscilloscope Repair, From The 1950’ish

The previous owner of this Danish vintage oscilloscope had tried to plug it in and the only result was smoke! I was asked if I wanted it for repair or it would be thrown out. The Radiometer Copenhagen OSG 42b …

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Agilent Markes UNITY Thermal Desorber Teardown – Gas Chromatography

Teardown of the Agilent Markes UNITY Thermal Desorber. Which contains a cold trap (Peltier) and some very fine fluid mechanical parts. A thermal desorber is used as a part in the chain of machines used in Gas Chromatography. I have …

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Power Vacuum, Radio and Electron Tubes – Isolation, Day 7

A talk about various power vacuum, radio or electron tubes, depending on what you like to call them. Triodes, Tetrodes and Pentodes in a range from 10 to 800 Watt plate dissipation. PL36, EL34, 6P45S, PB2/200, PB2/250, QB3/300, 250TH, QB5/2000, …

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100 Watt 6P45S amplifier update #2

The latest update to the 100 Watt 6P45S tube amplifier is about a lot of testing and fault finding that have gone into the tube amplifier. This is to correct noise and hum issues. It is now in a state where the …

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100 Watt 6P45S Tube Amplifier Update

The latest update to the 100 Watt 6P45S tube amplifier is about the new printed circuit boards. The circuit boards was installed in the enclosure and a simple signal generator test was performed.

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