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HP-41 and video interface 82163a / 92198a
04-24-2017, 03:11 AM (This post was last modified: 04-27-2020 11:16 PM by Dave Frederickson.)
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RE: HP-41 and video interface 82163a / 92198a
(04-23-2017 05:45 PM)Mark Hardman Wrote:  Not trying to hijack the thread. I recently acquired a Mountain Computer HP-IL video interface but have no composite monitor. Does anyone have any experience using an RCA composite to HMDI converter for connecting this interface to a modern computer monitor? Something along the lines of this?

I tried connecting the interface to the composite input on my monitor but experienced a lot of jitter. Marcus suggested I try a vintage monitor and that did the trick. I suspect that modern composite interfaces have a higher input bandwidth than the vintage CRT monitors. I would think that some sort of filter would eliminate the higher frequencies that are causing the jitter, but was unsuccessful finding something.

In related information, the HP 82912A and 82913A monitors are rebranded NEC monitors. The 9" monitor is an NEC JB-902M and the 12" is a JB-1201M.

Regarding the one on eBay, the price won't stay at $10 for long. These usually go for over $500.

I have the 92198 with the manual supplement for the 71, which seems to be missing from the document archives.

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RE: HP-41 and video interface 82163a / 92198a - Dave Frederickson - 04-24-2017 03:11 AM

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