Hey there,
I am planning to make a CRT oscilloscope to use on my audio projects. I am not an engineer but learning analog electronics... I would appreciate a lot if you could help me a little bit on building it. I am planning to make it from scratch.
I am willing to use a 3LO1I (3ЛО1И) tube
Here is the information I have found on the tube:
Right now I am trying to build the right power supply to power the tube. I will right here my process.
Thanks in advance...
I am planning to make a CRT oscilloscope to use on my audio projects. I am not an engineer but learning analog electronics... I would appreciate a lot if you could help me a little bit on building it. I am planning to make it from scratch.
I am willing to use a 3LO1I (3ЛО1И) tube
Here is the information I have found on the tube:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Right now I am trying to build the right power supply to power the tube. I will right here my process.
Thanks in advance...
Last edited:
Hey Ketje, thank you this is a great document. I am trying to make a similar tool actually, but without the amplifier. I am willing to make a normal ossiloscope that can be used with props...
I think on your document, the bottom part is the CRT and its power supply. I am trying to make this bottom part from scratch providing correct voltages to the CRT...
Is 3cm not a little small ? It's intended for monitoring as in the circuit I posted.The B4S2 used there has an assymetric deflection system, one plate at constant level,the other the signal.
There are also CRT with symetrical deflection, both plates the same signal but opposite phase.The data you showed doen't specify witch one it is.
Here the horizontal deflection oscillator + phase inverter if needed.
It is the so called transitron circuit.
The explanation is in dutch, hope you can decyfer.
Mona
Attachments
This tube is often paired with the multipurpose oscilloscope/clock board designed by Jon Stanley CRT Clocks or the vector CRT board Zloshnik: vector CRT display.
Thank you all, I have found a very good source and fully working schematics
Ultra-Simple Oscilloscope
I am going to build this one... Cheers.
Ultra-Simple Oscilloscope
I am going to build this one... Cheers.
I highly commend you on trying to build an oscilloscope and I wish you luck.
Have you looked on E-Bay for oscilloscopes ? They are really reasonably priced.
Have you looked on E-Bay for oscilloscopes ? They are really reasonably priced.
Thank you so much. 🙂 I have also checked the prices of old osciloscopes on Ebay, yes they are cheap, but where is the fun if I am not gonna make it 🙄
I have found the previous link I have shared very simple and very well documented. I am glad to find that page which is teaching the concept very well...
I'm not quite sure, but isn't a yet given oscilloscope mandatory for aligning a newly constructed one?
Best regards!
Best regards!
I don't think so. I think, the only calibration I may need is the sweep function, which I am planning to achieve with a 555 chip so it won't be an actual calibration... I am still using a software oscilloscope to test before building the actual one 🙂
I understand the desire to learn by building. That's how I got started almost 60 years ago. A DIY vacuum tube scope may not be the best place to start when you can get a complete kit of a DSO scope with an LCD screen for $25 on Ebay.
I got one of the DSO138 scopes to make a small scope module for my modular music synthesizer. it works far better than I thought it would. It can be DC coupled so calibration can be done with a DVM. Out of the box the cal was better than the 2.4 inch LCD can resolve, so I left it as built. The time base is generated in a microprocessor under crystal control, so again, good as built. The frequency response is in the 250 KHz range which is fine for audio, which is my application.
The DSO138 is a bare board pair without a case for around $25. There is a DSO150 which comes with a case, and may be a newer design, I don't know. I got my DSO138 a couple years ago.
I got one of the DSO138 scopes to make a small scope module for my modular music synthesizer. it works far better than I thought it would. It can be DC coupled so calibration can be done with a DVM. Out of the box the cal was better than the 2.4 inch LCD can resolve, so I left it as built. The time base is generated in a microprocessor under crystal control, so again, good as built. The frequency response is in the 250 KHz range which is fine for audio, which is my application.
The DSO138 is a bare board pair without a case for around $25. There is a DSO150 which comes with a case, and may be a newer design, I don't know. I got my DSO138 a couple years ago.
You only need a fully calibrated oscilloscope for detailed measurements. If all you are looking for is a signal then a DIY project is fine.
That ultra-simple schematic would be a nice setup to watch oscilloscope music; sweep function is not needed for this purpose because the left channel is connected to the horizontal channel X and right channel to the vertical channel Y. Jerobeam Fenderson is the best known composer of this kind of music.
When I was a teenager, I was given the remains of a DIY oscilloscope my grandfather attempted to build in the 1960's. He never got it to work and ended up buying one (a Telequipment S32 that I now have and still use). A useful tube oscilloscope is not easy to build 😎
