Visual Electronics X/Y Vector Monitor - P7 (GM) Phosphor.
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- Опубликовано: 11 дек 2024
- I saw this on eBay while looking through the test equipment section, it was advertised as a "Basic Oscilloscope"
I could see from the pictures that it was a X/Y Vector monitor, I was quite curious about it and thought it was unusual so placed a bid and won it.
I powered it up today to check it over and noticed the image persistence, I removed the orange filter and could clearly see this has a P7 phosphor CRT, which was unexpected.
The plan originally was to build a curve tracer or an octopus tester for it but now I'm not too sure what to use it for as I find the P7 phosphor fascinating.
I deliberately put it out of focus for the video so the camera can see the transition of colour with the phosphor persistence (And to save spot burning the CRT)
Truly beautiful display. I love the P7 phosphor. IMO it would be best to keep it as an X/Y scope and just build your own adapter circuits for it.
I've been wanting to build a radar scope with one of these tubes and use two out of phase sign waves to rotate the scan. Then to make the scan you could multiply a ramp wave with the X and Y sign waves.
Thank you for your comment. I will definitely keep it as a X/Y display, I need to have another look inside see if I can adjust the input voltage levels. If not I will build a circuit with an opamp.
Do you know what this display would have been used for? It seems a bit unusual as full deflection is TTL levels or higher.
That sounds amazing, I'd love a radar scope, I hope you find a suitable tube, I can look at the crt on this and give you a part number if it helps your search. I know it's made by Heerlen (Philips)
You have given me food for thought here, I could use my ARB to generate ramp waveforms and try what you said above.
We have just moved house so everything is still in boxes and I can't wait to get my workshop set up again!
@@dalerobinsuk I'm guessing it would have been used for anything requiring an XY display such as vector graphics, testing TV's, etc.
I've already found a suitable tube that uses P7 phosphor. It only cost about $45 shipped. All I have to do is power it and either drive some coils or the deflection plates if it has them.