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| Hewlett Packard 522B counter |
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| TimFox:
Amusing detail about the CDE test unit: the "common" post is red, while the "R" and "C" are black. |
| MaxFrister:
--- Quote from: TimFox on July 16, 2022, 04:22:37 pm ---Amusing detail about the CDE test unit: the "common" post is red, while the "R" and "C" are black. --- End quote --- And indeed common is positive. That seems to have been "common" for magic eye bridges. My Heathkit C-3 Condenser checker is the same except that the common terminal is also black. I have to remember that little quirk every time I get it out. |
| edpalmer42:
I see you're looking for a hard copy of the manual. I'm not sure what you've found online, but I spent a few minutes and came up with the following: Manuals: https://www.ebaman.com/remository/ELECTRONICS/Test-Equipment/HPAgilent/Counters/HP-521/ http://www.ko4bb.com/getsimple/index.php?id=download&file=HP_Agilent/HP_522B_Frequency_Counter_Service_Manual.pdf http://bama.edebris.com/manuals/hp/521a/ http://www.hparchive.com/Manuals/HP-523B-Manual.pdf It looks like the 521, 522, and 523 counters are all nearly the same Other Info: https://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1953-09.pdf https://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1952-11.pdf |
| MaxFrister:
Someone has sent me a clean copy of the schematics. They should be available in a couple of days at http://www.ko4bb.com/getsimple/index.php?id=manuals. |
| Cubdriver:
Cool old beast, and definitely a room heater! Nice score! :-+ :-+ -Pat |
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