Source of new Spectrum edge connectors?

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Firefox
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Source of new Spectrum edge connectors?

Post by Firefox » Fri Apr 26, 2019 12:05 am

Is there a good source for new ZX Spectrum edge connectors? I assume there must be, because there seems to be quite a cottage industry going cranking out new DivMMCs and the like.

Apologies if this is obvious, but after quite a bit of searching around I've not found an answer.
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PeterJ
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Re: Source of new Spectrum edge connectors?

Post by PeterJ » Fri Apr 26, 2019 6:39 am

https://ebay.us/NkRUD4

These are from Retro Computer Shack
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1024MAK
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Re: Source of new Spectrum edge connectors?

Post by 1024MAK » Fri Apr 26, 2019 8:37 am

Edge-connectors are also available from the larger electronic suppliers. You want 0.1” pitch.

For use on Sinclair computers, all of them require cutting down and a locating pin adding.

There are various ways of forming a locating pin. In no particular order...
  • Pull out the appropriate contacts with thin long nose pliers. Drill a hole from the top to the bottom of the plastic. Then using a hot soldering iron, drive a nail through the hole. Finally use a small hobby size cutting disk to cut the unwanted part of the nail off flush with the plastic.
  • Bend the appropriate contacts together and then solder.
  • Find a suitable size piece of plastic (bits of old cassette cases are apparently suitable), or a piece of PCB or matrix board (strip board) cut to size. You want a tight engineering fit. Pull out the appropriate contacts with thin long nose pliers. Then carefully glue the plastic/PCB in place.
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Re: Source of new Spectrum edge connectors?

Post by Firefox » Sat Apr 27, 2019 7:02 pm

Blimey, you used to be able to get them ready-made and new from Maplin and RS and the like...

Well, many thanks for the pointers!
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1024MAK
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Re: Source of new Spectrum edge connectors?

Post by 1024MAK » Sat Apr 27, 2019 10:25 pm

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Firefox
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Re: Source of new Spectrum edge connectors?

Post by Firefox » Sun Apr 28, 2019 8:24 pm

1024MAK wrote:
Sat Apr 27, 2019 10:25 pm
Well, various people will do the hard work for you...
Now then, I really like the look of this one:

http://www.divide.cz/index.php?y=ZX_ExpBoard_3.en
Image

That's perfect for experimenting with the Spectrum's expansion port. 0.1" pin headers are widely available for next to nothing, and having more than one port would make it easy to hook up a logic analyser to see what's going on.

Many thanks for the tip!
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