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| HP 1741A oscilloscope - restoration project |
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| ivan747:
--- Quote from: tekfan on July 03, 2011, 09:06:45 pm ---Don't be afraid to buy old non working stuff. This is how I got started in electronics. Well that and taking things apart to see how they work never to put them back again! Looking at a schematic and trying to identify the faulty part can be a very rewarding learning experience itself. --- End quote --- I have just tossed away a radio that looks from the 80's after taking it apart. I took the pots and interesting, expansive and hard to find components. I hate cheap bakelite PCB's. If it only depended on me, I would be buying this kind of stuff on eBay on a weekly basis, but I don't pay them and the shipping of this huge test equipment is as huge in cost as the equipment itself. |
| tekfan:
The project continues: At last the CRT came from the US. Here are the broken one and the new one Face of the old CRT Face of the new CTR. The graticule lines are slightly thicker than the old one. |
| MikeB:
Hi Tekfan, this is my first post to this site. I did a similar resto to you - only mine was not quite so bad - still have one problem though. The 'X' scan sometimes just scans half the screen - tapping some buttons can sometimes restore it - any ideas? I do not have the manual yet! Great resto BTW! |
| Spiro:
How much was shipping from Germany? Does it work in the end? |
| amspire:
--- Quote from: MikeB on October 08, 2011, 06:59:32 pm ---Hi Tekfan, this is my first post to this site. I did a similar resto to you - only mine was not quite so bad - still have one problem though. The 'X' scan sometimes just scans half the screen - tapping some buttons can sometimes restore it - any ideas? I do not have the manual yet! Great resto BTW! --- End quote --- I use an HP 1740A as my analog scope. Bought it cheaply with a dead power supply and fixed it. A really nice oscilloscope. The operator and service manuals (including schematics) can be downloaded from Agilent: Operator: http://cp.literature.agilent.com/litweb/pdf/01740-90911.pdf Service: http://cp.literature.agilent.com/litweb/pdf/01740-90909.pdf Application Note: http://cp.literature.agilent.com/litweb/pdf/5952-2040.pdf Also the HP Journal article on the HP1740A is great: http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1975-12.pdf Richard |
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