I bought two 750 mm long and 70 mm diameter plasma tubes from Barracuda Glass by Chris Burak. These lovely borosilicate glass tubes are filled with a mix of iodine, argon and krypton, for a bright blue glow. The Tesla coil used, is one of my first Tesla coils ever built. The Kaizer VTTC 1. […]
750 mm Plasma Tubes and Vacuum Tube Tesla Coil Read More »
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 was repaired and saved! Radiometer is a Danish company from 1935, started by the engineers
Radiometer Copenhagen OSG 42b Oscilloscope Repair, From The 1950’ish Read More »
This is a short walk-through on deuterium UV lamp theory and a test of the lamp in operation from its rather special power supply. PSU failed. Lamp failed. Complete fail. The lamp comes from the teardown of a Hitachi L7450 HPLC Diode-Array-Detector. HPLC is short for High Performance Liquid Chromatography. The DAD uses UV light
Hitachi 890-2430 Deuterium UV Lamp Test and Theory Read More »
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, TG1-2,5/4 and TG1-700/25 2x 30W EL34 Amplifier: https://kaizerpowerelectronics.dk/audio/2x30w-el34-tube-amplifier/ 1x 50W 6P45S Amplifier: https://kaizerpowerelectronics.dk/audio/100w-6p45s-monoblock-tube-amplifier/
Power Vacuum, Radio and Electron Tubes – Isolation, Day 7 Read More »
Teardown of the Siemens Polyphos 30 X-ray head which contains step-up transformers, voltage multipliers and a rotating plate x-ray tube and a lot of oil! Be sure to check out part 2 about the collimator and image plate and part 3 X-ray inverter system. Discussion of teardown and additional pictures: https://highvoltageforum.net/index.php?topic=523.0
Siemens Polyphos 30 X-RAY Head 125kV Teardown (Part 1 of 3) Read More »
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 audio amplifier itself is as stable as it will get. Further improvements lie solely on
100 Watt 6P45S amplifier update #2 Read More »
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.
100 Watt 6P45S Tube Amplifier Update Read More »