Sinclair ZX80 / ZX81 / Z88 Forums

You have a ZXpand Keyboard Membrane (blue tails). We had an issue with the bonding of the silver ink on some of these (the factory are still not sure why) so the easiest is to send you a replacement. However, it could also indicate that some of the pins inside the molex connectors are corroded or be...

Thanks for the pictures XavSnap - that is helpful as we can all see the keys link to the middle pin in the 5 way connector.

It will be interesting to see what the issue is....

I was actually looking to see if anyone had any information about, or experience with, making membranes... I have a number of retro machines for which no one's producing replacements, so I'm doing some research to see how feasible it would be to do runs of them. -John- I have quite extensive experi...

I am working on this without using mass production molds... the reason was to make membranes that had no keyboard labels that could be customized. Otherwise use Retroradionics for replacement membranes. Charles Charles - I am actually going to have a short production run of ZX81 membranes with a bl...

It is possible that the membrane has a fault - but the first thing to check is to short the 5 way connector with the 8 way using a piece of wire. Also check that are no pieces of the old membrane inside either connector (sometimes a tiny sliver is left behind). The pins on the connectors can also be...

Excellent - do you plan on offering these for sale?

I have just messaged gamesTM on Facebook - apparently 1st November will be their final issue, so I asked if they would consider uploading the magazines to the internet to form an archive ! I also asked if they had PDFs of the issues you mention.

JohnsBargs wrote: ↑Fri Oct 19, 2018 11:30 am So, did I miss something, or are these enhancement files available anywhere?

See page 2 - you need the Chroma interface to get the extra colour

Excellent find - Atlântida and Columbia look excellent!

Welcome - great to see another programmer on here