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TM500-series back-plane connectors


Colin Herbert
 

I have a TM504 which has one of the springy brass-coloured contacts on the back-plane mangled. I have tried removing one of these contacts from a spare back-plane connector with no success - they just get destroyed. I think if I could obtain a good contact, I might have some luck in fitting it to the damaged back-plane. This might mean that I will have to destroy a plastic back-plane connector to obtain one, unless someone has a broken back-plane connector that has loose contacts. It seems that these connectors were originally made by EDAC, but he modern ones don't have the same contacts - they are nickel-plated brass and are a different size. Similar connectors are made by and for JAMMA, too, but they are also not like the originals.
Does anyone have any ideas or some loose (and correct) contacts?
TIA, Colin.


 

Hi Colin,
If the contact is not one of the ones dedicated to providing power or connecting to the pass transistors then it may never get used and you can put a note on the top of the TM504 saying that you removed it. The odds are extremely low that you will ever need that particular contact on that slot to interconnect a signal between plugins.

If that pin is being used for something important then I have the entire backplane from a prototype TM501 with the transformer and all the parts. It has the EDAC connector on it. You can do what you want with it. You are welcome to it.

Let me know off list (dennis at ridesoft dot com) if you can use it.
Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Colin Herbert via groups.io
Sent: Wednesday, September 02, 2020 6:36 AM
To: TekScopes@groups.io
Subject: [TekScopes] TM500-series back-plane connectors

I have a TM504 which has one of the springy brass-coloured contacts on the back-plane mangled. I have tried removing one of these contacts from a spare back-plane connector with no success - they just get destroyed. I think if I could obtain a good contact, I might have some luck in fitting it to the damaged back-plane. This might mean that I will have to destroy a plastic back-plane connector to obtain one, unless someone has a broken back-plane connector that has loose contacts. It seems that these connectors were originally made by EDAC, but he modern ones don't have the same contacts - they are nickel-plated brass and are a different size. Similar connectors are made by and for JAMMA, too, but they are also not like the originals.
Does anyone have any ideas or some loose (and correct) contacts?
TIA, Colin.





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Dennis Tillman W7pF
TekScopes Moderator