Steve Anderson wrote:No problem, I hope others have picked up a few pointers and one day will have a go too..
Yesi hope you have a go at another one as well ,advice it sure helped me i am still very interested in improving skills building them like to try a all valve monitor one day .
Hope too others look on and give it a go ..doing this one i am less worried about taking something different CRT i am used too ,as long as you know some information about the CRT you tend to be able to tweak it to work from a lower voltage range more information the better ,i must of had enough to get it going ,Data sheets do help .
...nor me! I'm not even sure I would have attempted using this CRT. Your dogged determination has proven its worth again!
It was more at the start i had nothing to loose it was going to sit there for years and do thing or experiment and see how it goes worst case you brake it ,i did figure i should at least be able to see a cathode ray spot then its a matter of brightness control and focusing control if you get passed this step onto the deflection side .
A dark room helps as you can notice the unfocused cathode rays on the phosphor then you can start tweaking to it and test for any improvements bit of trial and error works for me ,i kept on mind the HV power supply voltages would have to be adjusted to this CRT so started off on the lower side the end result voltages were very close to the data sheet .
I have the monitor set to sync at a frame rate of 12.5Hz all line rates from 40 line to 80 tested at the moment the pictures are between 50 line and 64 as we know with the bandwidth we have a on a PC sound card there's detail loss trying it to high with that frame rate ,i will be dropping the frame rate for a more lines later on should give very good detail for this size tube then .
I've been a bit quiet here recently, two other projects are occupying me at the moment...
1) An update to my GPSDO (Global Positioning System Disciplined Oscillator) such that it now uses the GLONASS (Russia), Galileo (Europe), Beidou (Chinese), QZSS (Japan) satellites in addition to the usual US GPS and US SBAS systems. This gives me a frequency reference of 10MHz +/- 0.005Hz after a warm-up of an hour, but it's on 24Hrs so I don't have to wait. I don't really need that degree of accuracy, I'm just fascinated by time and its inverse, frequency. Positional accuracy should be within 10cm, but that I don't need - I think I know where I am when at home![/quote]
I have not played with Satellites for a while not sure how often your waiting for them to update your device ,but i found it takes a few bit of the day up tracking them getting things ready.
2) Real work, i.e. paying...A Sound Pressure Instrument for measuring and recording sound levels during concerts and the like, though not that many concerts happening right now. When the prototype looks at least reasonably presentable(?) I may post up a small item on it.
Steve A.
That ones a bit different might get the bomb squad out on you if you bring a Gadget into a concert
[quote]
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.