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1770 wire links

Posted: Tue Jun 11, 2019 7:29 am
by marcusjambler
quick question :

I'm struggling to find the wire links as used in the 1770 Beeb upgrade.
Does anyone have a source for them?

Marcus

Re: 1770 wire links

Posted: Tue Jun 11, 2019 9:18 am
by johnkenyon
Take a couple of resistors from that pack of 1000 you got cheap on eBay, clip the leads off, bend to the right spacing with your pliers, trim to length, install....
That's the cheap way...

Re: 1770 wire links

Posted: Tue Jun 11, 2019 9:21 am
by AndyF
I found one supply of these, well one type of kit they were not brilliant and did nto want to stay in the socket, if that was the sockets fault or not I'm not sure. In the end I just gave up and soldered some nice insulated links directly, job done. :)

Re: 1770 wire links

Posted: Tue Jun 11, 2019 9:25 am
by marcusjambler
Thanks fellas...

Of course I can do those things ( and often do :D )
Just trying to source the correct part

Re: 1770 wire links

Posted: Tue Jun 11, 2019 9:48 am
by Elminster
I guess to get them as good at the ones you get in the kit you would want to heat shrink some heat shrink in the middle of your resistor leg.

Re: 1770 wire links

Posted: Tue Jun 11, 2019 10:22 am
by johnkenyon
Elminster wrote:
Tue Jun 11, 2019 9:48 am
I guess to get them as good at the ones you get in the kit you would want to heat shrink some heat shrink in the middle of your resistor leg.
Or increase the leg length (if inserted in an IC socket), or solder with an air gap between wire and PCB if being soldered in...

Re: 1770 wire links

Posted: Tue Jun 11, 2019 12:46 pm
by 1024MAK
Or maybe some proper industrial headers for wire links etc...

link/component header

dust covers

:mrgreen:

NB similar parts may be available elsewhere for more or for less money...

Mark

Re: 1770 wire links

Posted: Tue Jun 11, 2019 1:09 pm
by Elminster
I deny that I have used paperclips and cellotape.

Re: 1770 wire links

Posted: Tue Jun 11, 2019 2:06 pm
by AndyF
Elminster wrote:
Tue Jun 11, 2019 1:09 pm
I deny that I have used paperclips and cellotape.
I have seen a missing ROM 'leg' replaced with a regular staple previously, not soldered on, just "making contact" as such. :lol: :oops: Not my doing!

Re: 1770 wire links

Posted: Tue Jun 11, 2019 2:37 pm
by johnkenyon
If I don't have any spare resistor/<insert any other radial electronic component here> legs lying around the bench, I would reach for the reel of insulated single strand insulated copper wire, strip one end, cut link size+1cm, then strip the other end. Bend neatly with pliers and insert.
For links less than 1cm or so, just strip 2cm of insulation, then cut to required size.

Rubber sleeving, heat shrink etc, is reserved for stranded cables going into tight places (e.g. the last 5mm of cable going into a connector solder bucket) or where you've had to solder two bits of wire together and the thing's going to be hanging in space.

Re: 1770 wire links

Posted: Tue Jun 11, 2019 3:15 pm
by KenLowe
marcusjambler wrote:
Tue Jun 11, 2019 9:25 am
Just trying to source the correct part
Something like this for 5.08mm spacing:

https://uk.rs-online.com/web/p/jumpers-shunts/0434728/

or this if you want 2.54mm spacing:

https://uk.rs-online.com/web/p/jumpers-shunts/1586169/

Re: 1770 wire links

Posted: Tue Jun 11, 2019 4:37 pm
by AndyF
I wanted to say the problem I had with one kit at least was not the quality of the links themselves, the fact they would not stay in the socket, despite the socket not appearing to be worn out (would be rare for one of these two sockets to be worn I suspect)

It was almost as though as daft as it might sound the diameter of the link wire was a tad too small, only a fraction of a mm or so but enough for it to not want to stay put. I was very concerned it may fall out and in one case it actually did hence the soldering of sensible jumper wires.

Re: 1770 wire links

Posted: Tue Jun 11, 2019 5:02 pm
by marcusjambler
Something like this for 5.08mm spacing:
Thanks Ken :D