General > General Technical Chat
Looking for individually screened ribbon cable
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CambridgeMart:
Looking through my cable stock, I found that RG178 is nice and small and will work nicely, so I'm going to make up my cables from this. I just need to find a neat way to keep them flat in a ribbon; failing that, I could bunch them up in expanding braided nylon sleeving I guess.
David Hess:
You could braid the RG178 into flat cable.
ConKbot:
The construction looks similar to how Samtec does their very high speed connectors. I.e.
 https://www.mouser.com/ProductDetail/Samtec/HLCD-30-1200-TR-TR-1?qs=%2Fha2pyFadug1ss0UNWiEgg7s0vKN4IHC0yaasB0PaXCvXLJ0db4i9gB6hBUOAvrQ

If you can find a source that isn't $8/foot .047 coax may be of use for something dense. https://www.pasternack.com/precision-0.056-semirigid-replacement-50-ohm-coax-cable-fep-jacket-pe-p047-p.aspx

FEP or PTFE highly suggested for your own sanity while soldering. Plus then you can use a thermal stripper for cable prep.
It's just a shame pasternack is so expensive that cutting up a samtec cable is a more viable option :P
CambridgeMart:
RTG-178, or at least a Chinese version of it, is available fairly cheaply; it's marginally larger than the Pasternack cable, but that won't be an issue in this case, it is PTFE jacketed (I wouldn't even look at PVC or PE cables for this job).
PlainName:

--- Quote ---find a neat way to keep them flat in a ribbon
--- End quote ---

Clear UV-settable resin. I used this technique to make up a ribbon from discrete wires for a small connector. The photo is of my prototype, so could be a lot neater. Essentially, just dribble across the strip at whatever suitable intervals and fix with a UV LED in 10 secs. The resin could be the blindingly expensive Bondic, or the super-cheap stuff on Amazon for arts and crafts - both do the same thing as well as each other.
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