I once built a HF oscillator with a GU81M tube. The anode voltage came from 2 microwave transformers. The feedback to the grid of the tube consisted only of a small wire antenna and a resistor against GND. The anode was connected to a resonator coil. At the other end of the coil, a plasma flame usually ignited immediately when the anode voltage was switched on, sometimes one had to help with a WELL INSULATED piece of metal. With the piece of metal I could draw up to 10cm long HF - arcs. The radiated HF - power has immediately crashed my PC in my house and 2 TV - devices have switched off. Fortunately, they still worked properly afterwards. Otherwise, my wife would probably have done terrible things to me. 😂 After that, I used the "device" only a few times outside and then disassembled it.
Wow - I looked up those tubes - they are really high power tubes. It certainly makes my little HV generator look like a toy! With such large HF arcs your project would seem to have a lot of similarities with a Tesla coil, but with way more power. Certainly a good example of induced voltages messing up electronics - similar to a EMP. Was it just for fun? Or was there a use for you high power HF generator? When I first saw HF oscillator I immediately thought ham radio but it clearly isn't that.
@@ElectromagneticVideos That was a test setup at that time, which went in the direction of CW - tube Tesla coil. In the middle of the residential area, the device would certainly have brought me sooner or later in trouble with our RegTP. Therefore I did not work on it any longer. The HF - power was surely >0,5kW, because the anode plate started to glow within seconds. The oscillation frequency was about 6MHz. (RegTP = Regulatory Authority for Post and Telecommunications in Germany.)
@@kaysonntag74 That is very very cool! An incredible amount of power - year ago I was involved in digital HF communications and a few hundred watts was all that was needed to go continent type distances. You didnt make a video of it, did you? It would have been fascinating to see!
@@ElectromagneticVideos This is not my video, but in principle it is a pretty similar circuit that is used there. I have my video also uploaded at that time, but I no longer know the name of the account at that time on RU-vid. So the discharge looked with me but also. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_dLIVwTXCyc.html
