Electronics > Metrology

Anyone have an original Fluke 5200A extender card

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Rax:
Here's the same, brought a bit further along, though the location of the vertical card connector (female, receiving for the card to be troubleshooted) is not yet determined precisely. The latter is a TE 1-5530843-0, which I think is the most affordable fitting choice (in the US).

tridac:
I got an externder card from an Ebay seller in Korea, around $60, from memory, after searching for ages for the Fluke accessory. Looks larger than the Fluke version, but if I were trying to build one, would probably have one small card with connector at each end, then use ribbon cable to join the two. Would provide more flexibility in terms of card orientation. The power supply is definately fragile and runs quite hot in normal operation, discolouring the boards over time. Probably exacerbated by uk line voltage, often nearly 250 volts. Low value resistors used as fuses, if any problems arise on the power amp, which must have been pushing the state of the art at the time. Got over the heat problem by fitting a small fan in the psu compartment, which now runs much cooler. Well worth the mod.








 

Rax:
The good news: 2U ENIG finished boards are in production in beta stage. This far everything checks out.

The bad news: in checking how my alpha-run batch works and fits, I removed A9 (oscillator control module), and as I'm trying to put it back, I'm seeing a rainbow ribbon dangling unconnected. Can anyone possibly look at their A9 and see if they see this? Is it un-connected (can't imagine why). If connected, where does it connect?

I'm in that unpleasant place where I hope I didn't prove Murphy (the guy with the laws) right and damage my working unit when I didn't really need to.

Rax:
Record pictures from last year - when I was "photo-documenting" the unit - seem to show the same dangling ribbon cable.

Granted, I don't think I had any reason to look at this particular module very closely, much less pull it out.

Could it be this was not connected in the unit as I received it (and working fine)? If yes, what was its use? Probing? Some sort of impedance matching network? I can come up with a couple other crazy ideas, but this is at this time really mysterious to me. Also, not documented in the SM, as far as I can tell.

Rax:
A bit of spam possibly on this specific thread (and hopefully closing off this side story shortly), but a quick check seems to point to no obvious issues. So the unit seems to work OK.

I'd still like to figure out what's the use or reason for this ribbon cable coming out of U5.

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