Today, I took delivery of my new Owon SDS1102 100MHz Oscilloscope, and the nanoVNA. These will get tested over the weekend. The nanoVNA cost just £27 and looks to be an impressively capable little device - albeit with, for me, a very steep learning curve! The 'scope on the other hand has cost considerably more, and will be the subject of detailed future posts.
Something Ive not said much about is the Seafix 2000 RDF unit. This is considerably chunkier, and heavier, than the Euromarine Radiofix unit. I got this from an ebay seller and it came with the original headphones, which work quite well. As with the other unit, I need to find time to get it up onto the top of the local hill where it is radio quiet, and try it out properly.
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| Seafix 2000 marine RDF 'gun' |
A few images of traces on the little DSO138 'scope kit now. I discovered an extra set of details that can be displayed by holding down the OK button when the timebase is highlighted. The trace below shows the HV generator on the Geiger circuits blocking oscillator, as measured at the switching transistors collector.
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| Blocking oscillator pulses |
What is interesting, is what happens when the timebase is decreased and the trace adjusted to show just one of the blocking oscillators pulses -
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| Inductor ringing during oscillator cycle |
It is possible to see the 'ringing' of the inductance as the induced currents oscillate. Having not worked with blocking oscillators and flyback converters before, I found this to be quite fascinating, and it really shows the value of a modern oscilloscope - even a £10 200kHz one!
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