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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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6th Feb 2014, 10:52 pm | #1 |
Nonode
Join Date: Aug 2007
Location: Walsall Wood, Aldridge, Walsall, UK.
Posts: 2,874
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Advance/Gould OS 4072/OS 4074 Repair Hints!
Hi!
Watch this space for repair hints and tips with regard to these very sophisticated British-Made Digital Oscilloscopes that seem to be giving too many members fearful nightmares! Chris Williams |
10th Feb 2014, 2:37 pm | #2 | |
Nonode
Join Date: Aug 2007
Location: Walsall Wood, Aldridge, Walsall, UK.
Posts: 2,874
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
Hi!
Quote:
This Forum is, and always was, intended for Members to share information, tips and repair hints that have kept so much of the older (repairable!) technology alive that the very great majority of Members, myself included, earned our living on, and in my opinion, once the data has been obtained by legitimate means, wether it be outright purchase, freely given by the generosity of others or "reverse-engineered" from an exsisting item of equipment, should be freely accessible without further payment needed or the need to install disreputable adware-infested "download-managers" to access it, or have to visit specialist repositories! In addition, I feel that the material contained in this Manual is too valuable and important to be secreted away and offers a valuable insight into a combination of analogue, digital and high-voltage techniques in one piece of equipment! I will also draft replacement circuit-diagrams with fully-annotated components onto A4 sheets for easy printing, but this will be a long project, so please bear with me everyone! Please note - I haven't yet been able to purchase one of these oscilloscopes yet as I'm only on Jobseeker's at the moment, so the hints I will provide are based on my experience with other oscilloscopes, industrial electronics, monitors, etc! I will work thro' the scope in the following order:- 1) PSU; 2) CRT Circuit; 3) Blanking/bright-up; 4) Pre-amps; 5) Vertical plate amplifier; 6) Input triggering; 7) TV triggering; 8) Timebase; 9) Horizontal plate amplifier; 10) CCD Board; 11) Acquisition Board; 12) Display Processor; 13) Microprocessor; 14) RAM; 15) Front Panel; 16) Hard-Copy plotter; 17) Miscellaneous. As I work thro' each section, I'll scan and post the relavant Original Manual pages with each post to keep the file-sizes down, and my final post will give instructions for assembling a Full Copy of the Manual in the correct order! Some time in the future, when I can obtain one of these Oscilloscopes myself, I will upload additional material as I can produce it, for example, one project will be a set of gerber-files to make the two Service Extender Cards. Bear with me everyone, please! Chris Williams
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It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed! Last edited by Chris55000; 10th Feb 2014 at 3:03 pm. |
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10th Feb 2014, 3:34 pm | #3 |
Retired Dormant Member
Join Date: Feb 2014
Location: Torino, Italy.
Posts: 2
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
Hello, this is the second post from me on this forum, the
first one was a request for the manual fo the 4072/4074. I hope you can proceed with your work, first of all because I need the manual And also because I've done this before acquiring a manual and then uploading it on a free manuals repository, maybe not a nice thing to do from the manual seller point of view. But the company was gone from a long time, many people willing to pay for the manual copy reported that the seller didn't even answer to their emails etc... The public manual can help keeping these wonderful devices go (someone mentioned Solartron? ) Anyway I'm with you ! Fabio |
10th Feb 2014, 8:12 pm | #4 |
Retired Dormant Member
Join Date: Feb 2014
Location: Near Leeds
Posts: 24
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
This will be great as i am sure it will be a great learning tool for people like me.
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16th Mar 2014, 6:51 pm | #5 |
Retired Dormant Member
Join Date: Nov 2013
Location: Ramsgate, Kent, UK.
Posts: 5
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
Hi guys,
I am delighted that so many people appear to be restoring their Gould 4074. GREAT. We are just doing the same. Our problems appears around the character generator, and we need urgently : A) An extender card on loan etc. B) The character generator ROM, if you happen to have the code we can burn it here. Or you perhaps have any ideas, tips etc. Thanking you all Al: ---- |
17th Mar 2014, 1:27 pm | #6 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,643
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
Cross reference: https://www.vintage-radio.net/forum/...ad.php?t=75710
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25th Mar 2014, 9:55 am | #7 | |
Retired Dormant Member
Join Date: Nov 2013
Location: Ramsgate, Kent, UK.
Posts: 5
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Re: Advance/Gould OS 4072/OS 4074 Repair Hints!
Quote:
Do you have a Gould 4074 display board we could use, to swap over ours for comparison purposes ? Needless to say, we will return it in good shape. We appear to have a blanking problem. 16 dots. Kind regards Al: --- |
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