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Building a valve CRO from junk parts.
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Return to top of page · Post #: 1 · Written at 9:17:05 AM on 19 February 2016.
	Fred Lever Location: Toongabbie, NSW Member since 19 November 2015 Member #: 1828 Postcount: 1250
Here we are folks. I am in the process of building this CRO and have the CRT and Vertical amplifier sections designed and at the bench test stage and written up an article to cover these. I need to do other stuff now like working for a wage (how boring) and will take some weeks to get to the Time base, Horizontal amplifier and then putting all the stuff into a case. Like all projects I'm making it up as I go so you just cannot put a time on it. So for this post I will send a PDF covering the first part, CRT and Vertical Amp and that may prompt some enthusiasts to make their own CRO? Fred. Building a Valve Oscilloscope, Part 1

Return to top of page · Post #: 2 · Written at 10:01:16 AM on 19 February 2016.
	Redxm Location: Tamworth, NSW Member since 6 April 2012 Member #: 1126 Postcount: 466
Looking forward to reading about another of your projects. ben

Return to top of page · Post #: 3 · Written at 9:18:02 PM on 19 February 2016.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7301
Looking promising so far. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 4 · Written at 7:41:25 PM on 28 February 2016.
	Fred Lever Location: Toongabbie, NSW Member since 19 November 2015 Member #: 1828 Postcount: 1250
Ok so now here is part 2 of what will be 3 parts I guess. This covers the time base and horizontal amplifier. The 3rd part will be about making the power supply into a module, winding a power transformer the same as the rough test unit and jamming it all into a x-PC enclosure. Fred. Building a Valve Oscilloscope, Part 2

Return to top of page · Post #: 5 · Written at 7:43:30 PM on 19 March 2016.
	Fred Lever Location: Toongabbie, NSW Member since 19 November 2015 Member #: 1828 Postcount: 1250
Finally I have completed the oscilloscope and present the third part here to be read in conjunction with the first two parts. In this part I build the power supply module including winding a power transformer and fight the whole thing into a PC tower cabinet. The CRO was then "calibrated" so voltage and frequency can be approximately read off. I'm happy to answer any questions about it just add to the thread. Fred. Building a Valve Oscilloscope, Part 3

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