[Ql-Users] Membranes Quanta Dec/Jan Mag. p52
I was interested to see in Quanta the picture of the replacement membrane with strip leads. This is just what I have done, but with a standard membrane. Having found that the fault was in the leadout strips, and jumpered breaks by drilling holes and fitting fine wires with conductive paint, as more broke, I decided that the best way was to cut them off and fit strip cables in a similar way, the strip cable having the same pitch as the connectors on the main board. There seemed no point in putting another of the same pattern in. I've done several and they have been fine. I probably put a note about this in Quanta at the time. I have also got a Rainbow keyboard which came fitted to a QL; it just plugs into the connectors, and usefully sports a numeric pad. I don't know what is inside as it is rivetted! BryanH ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Membranes Quanta Dec/Jan Mag. p52
I was interested to see in Quanta the picture of the replacement membrane with strip leads. This is just what I have done, but with a standard membrane. Having found that the fault was in the leadout strips, and jumpered breaks by drilling holes and fitting fine wires with conductive paint, as more broke, I decided that the best way was to cut them off and fit strip cables in a similar way, the strip cable having the same pitch as the connectors on the main board. There seemed no point in putting another of the same pattern in. I've done several and they have been fine. I probably put a note about this in Quanta at the time. I have also got a Rainbow keyboard which came fitted to a QL; it just plugs into the connectors, and usefully sports a numeric pad. I don't know what is inside as it is rivetted! BryanH Little tips and suggestions like this are always helpful. Why not jot it down and put it in Quanta or QL Today for a wider audience to read of the possibilities. My only slight concern would be when plugging the strip cables into the membrane sockets ont he keyboard. Would this potentially force them wider open so that if ever you went back a standard membrane (and thank goodness Rich is securing supplies of these vitasl spares with assistance from Quanta) they would fail to make proper connection with the by-now wider contacts? Years ago (in the 1980s) I had a QL with a replacement keyboard sat in place of the original keyboard (Schoen or one of those types,I forget which). When it became faulty and I tried to use the original keyboard and cover, the keyboard did seem intermittent, but I couldn't tell at the time if this was the membrane (which had been in the attic for a while) or the contacts which was the problem. That QL got kept for spares for years so I never did find out if it was my adventures with the wire connections which caused the problem or not. Dilwyn Jones ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Membranes Quanta Dec/Jan Mag. p52
-- QBBS (QL fido BBS 2:257/67) +44(1442)-828255 t...@firshman.co.uk http://firshman.co.uk Voice: +44(0)1442-828254 Fax: +44(0)1442-828255 Skype: tonyfirshman TF Services, 29 Longfield Road, Tring, Herts, HP23 4DG On 21 Dec 2010, at 16:54, Dilwyn Jones dil...@evans1511.fsnet.co.uk wrote: I was interested to see in Quanta the picture of the replacement membrane with strip leads. This is just what I have done, but with a standard membrane. Having found that the fault was in the leadout strips, and jumpered breaks by drilling holes and fitting fine wires with conductive paint, as more broke, I decided that the best way was to cut them off and fit strip cables in a similar way, the strip cable having the same pitch as the connectors on the main board. There seemed no point in putting another of the same pattern in. I've done several and they have been fine. I probably put a note about this in Quanta at the time. I have also got a Rainbow keyboard which came fitted to a QL; it just plugs into the connectors, and usefully sports a numeric pad. I don't know what is inside as it is rivetted! BryanH Little tips and suggestions like this are always helpful. Why not jot it down and put it in Quanta or QL Today for a wider audience to read of the possibilities. My only slight concern would be when plugging the strip cables into the membrane sockets ont he keyboard. Would this potentially force them wider open so that if ever you went back a standard membrane (and thank goodness Rich is securing supplies of these vitasl spares with assistance from Quanta) they would fail to make proper connection with the by-now wider contacts? Years ago (in the 1980s) I had a QL with a replacement keyboard sat in place of the original keyboard (Schoen or one of those types,I forget which). When it became faulty and I tried to use the original keyboard and cover, the keyboard did seem intermittent, but I couldn't tell at the time if this was the membrane (which had been in the attic for a while) or the contacts which was the problem. That QL got kept for spares for years so I never did find out if it was my adventures with the wire connections which caused the problem or not. Dilwyn Jones ___ QL-Users Mailing List http://www.qd.demon.co.uk/smsqe.ht Yes that is exactly what happens. Tony ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Membranes Quanta Dec/Jan Mag. p52
On 21/12/2010 04:36, Tony Firshman wrote: i found the most common break was where the tails joined the main part. when fitting one should make a gentle bend, unlike the factory. Yes, that is where I had to put the jumper links, but if opened up, more broke, so I put the ribbon cable on. There was also a problem where the fierce connector stripped the conducting strip. The connectors are made to take a board edge connector, so should be able to take the ribbon, and still pick up the new membrane or an old one. I am sure that I did a sketch etc, but it is so long ago that I don't know if I could find it. I've not got an example, except cased up, to see exactly how I did it. BryanH ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Membranes Quanta Dec/Jan Mag. p52
On 21/12/2010 17:06, Tony Firshman wrote: On 21 Dec 2010, at 16:54, Dilwyn Jones dil...@evans1511.fsnet.co.uk wrote: I was interested to see in Quanta the picture of the replacement membrane with strip leads. This is just what I have done, but with a standard membrane. Having found that the fault was in the leadout strips, and jumpered breaks by drilling holes and fitting fine wires with conductive paint, as more broke, I decided that the best way was to cut them off and fit strip cables in a similar way, the strip cable having the same pitch as the connectors on the main board. There seemed no point in putting another of the same pattern in. I've done several and they have been fine. I probably put a note about this in Quanta at the time. I have also got a Rainbow keyboard which came fitted to a QL; it just plugs into the connectors, and usefully sports a numeric pad. I don't know what is inside as it is rivetted! BryanH Little tips and suggestions like this are always helpful. Why not jot it down and put it in Quanta or QL Today for a wider audience to read of the possibilities. My only slight concern would be when plugging the strip cables into the membrane sockets ont he keyboard. Would this potentially force them wider open so that if ever you went back a standard membrane (and thank goodness Rich is securing supplies of these vitasl spares with assistance from Quanta) they would fail to make proper connection with the by-now wider contacts? Years ago (in the 1980s) I had a QL with a replacement keyboard sat in place of the original keyboard (Schoen or one of those types,I forget which). When it became faulty and I tried to use the original keyboard and cover, the keyboard did seem intermittent, but I couldn't tell at the time if this was the membrane (which had been in the attic for a while) or the contacts which was the problem. That QL got kept for spares for years so I never did find out if it was my adventures with the wire connections which caused the problem or not. Dilwyn Jones ___ QL-Users Mailing List http://www.qd.demon.co.uk/smsqe.ht Yes that is exactly what happens. Tony ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm I have come across this on a few QLs - it was one of the things that lead me to source some new molex connectors earlier in the year - I bought up the last stocks of some of them (one company sent me 2 for free) -as Molex said that they would have to make some new ones if we needed them with a minimum order of about 200 !! -- Rich Mellor RWAP Services http://www.rwapsoftware.co.uk http://www.rwapservices.co.uk -- Try out our new site: http://sellmyretro.com ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
