Re: HP 83592B hangs 8350B sweeper
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Peter,
I have an 83594A and an 83595A wth boards that have mismatched part numbers so it may not have been anything nefarious but if so its contagious! There are a couple of boards that don't match any of the manuals I've been able to find, and there are switches that open parts of loops, and pots for adjustments, and none are mentioned in any manual. The "joys" of working on older gear! Steve WB0DBS
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On Oct 16, 2015, at 10:47 AM, 'Peter' bunge@... [hp_agilent_equipment] < hp_agilent_equipment@...> wrote:
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Has anyone noticed that boards in HP 8350 plug-ins have part numbers different from the plug-in model? My 83592 has two boards, A6 and A7, that have part numbers starting with 83595-x. The others start 83592-x. ? I know that replacing the A6 board (83595-60106) with a good one (83592-60106) gets the plug-in working, even with the 83595-x A7 board. ? On the bad A6 board I have found that a pot (R63, SRD bias) was missing and the Band 0 jumper was in the B1 position. The board also has two extra pots which are not shown on the schematic or component location. There are seven single turn pots on the top left, viewed from component side. They are shown in the 83595 manual. Did someone try to get it running with the board from a 83595 (0.01 to 26.5 GHz) plug-in? I need to look carefully at every component. The 60106 in the number is the same (83592-60106) and the boards look identical but I¡¯m sure there are component differences as I have found. I do not believe that this is the original board for the plug-in. ? I have seen instruments put together with odd parts before. I have an HP8656A chassis that is part 8656A and part 8657A inside. I gave up troubleshooting when I discovered this. This is a very dishonest practice to do this and sell the items as-is, for parts, etc. ? ?
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