What are these called?

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dominicbeesley
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What are these called?

Post by dominicbeesley » Mon Nov 27, 2017 11:37 am

20171127_113050-s.jpg
The riser/header/dil plug/board to board connector things?

I'd like some for my experiments, but also to replace the broken ones on my WE 1770 boards (all have at least one missing pin!)

I've just spent an hour on RS and Farnell but don't seem to be able to find anything.

D

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danielj
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Re: What are these called?

Post by danielj » Mon Nov 27, 2017 11:51 am

They're sort of unobtanium - the standard method is to use some turned pin headers, then stack up turned pin sockets underneath to the right height.

d.

RobC
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Re: What are these called?

Post by RobC » Mon Nov 27, 2017 12:37 pm

Samtec make them and call them APA adapter plugs.

Toby Electronics sell them but you have to contact them to get the right size:
https://www.toby.co.uk/datasheets/secti ... 2016103015

The 40-pin 0.6" version was called APA-640-T-N when I ordered some a good while back.

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danielj
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Re: What are these called?

Post by danielj » Mon Nov 27, 2017 12:48 pm

Thanks Rob - what's the ballpark price for them?

d.

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daveejhitchins
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Re: What are these called?

Post by daveejhitchins » Mon Nov 27, 2017 1:05 pm

I may have some of these - Let me check and get back with details . . .

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

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KenLowe
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Re: What are these called?

Post by KenLowe » Mon Nov 27, 2017 1:16 pm

This outfit is quoting for them @ £5.59 each (+ £12 shipping - or free shipping if your order is > ~£33). I'm guessing VAT will be on top:

https://www.digikey.co.uk/products/en?k ... PA-640-T-N

RobC
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Re: What are these called?

Post by RobC » Mon Nov 27, 2017 1:21 pm

danielj wrote:Thanks Rob - what's the ballpark price for them?
I'm afraid you'll have to call/email them. They were £2.99 each when I bought them but that was back in 2008!

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danielj
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Re: What are these called?

Post by danielj » Mon Nov 27, 2017 1:30 pm

erk :D

d.

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daveejhitchins
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Re: What are these called?

Post by daveejhitchins » Mon Nov 27, 2017 1:31 pm

The ones I was thinking about are these:
IMG_1350.jpg
Probably no good with a width of 0.3"!

But, courtesy, of Simon Inns, I have a few of these. They would need extra height e.g. other turned pin sockets (there're only 16mm high - top to bottom of pins!), however, that would be good to save damage to the delicate pins.
IMG_2117.jpg
Let me know - Postage only!

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

dominicbeesley
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Re: What are these called?

Post by dominicbeesley » Mon Nov 27, 2017 1:42 pm

Yes please Dave, they look like they would work. I'll PM you.

I'll probably solder an socket upside down on the duaghter board anyway as I've had nothing but bother with these things.

D

dominicbeesley
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Re: What are these called?

Post by dominicbeesley » Mon Nov 27, 2017 1:48 pm

Thanks RobC for that part-number that's led to a few more avenues...

Digikey have them listed at £5.59 each and reckon a lead time of 18/12/17

D

dominicbeesley
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Re: What are these called?

Post by dominicbeesley » Mon Nov 27, 2017 1:56 pm

Farnell also have these http://uk.farnell.com/samtec/bbs-120-t- ... dp/1766246 single row jobbies but they're only 1.5cm of rise....

crj
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Re: What are these called?

Post by crj » Mon Nov 27, 2017 3:25 pm

Personally, I'm looking for that kind of thing but as low profile as possible, not as high. Does anybody know of something cheaper and/or more available than the Precidip ones which cost about 5p/pin?

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Re: What are these called?

Post by JannievanZyl » Sun Dec 31, 2017 6:31 am

crj wrote:Personally, I'm looking for that kind of thing but as low profile as possible, not as high. Does anybody know of something cheaper and/or more available than the Precidip ones which cost about 5p/pin?
Could you not use these strips for a low profile jobbie?
BF1C9EA5-95EC-4B9E-AF3A-984668B0B600.jpeg
BF1C9EA5-95EC-4B9E-AF3A-984668B0B600.jpeg (24.02 KiB) Viewed 235 times

dominicbeesley
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Re: What are these called?

Post by dominicbeesley » Sun Dec 31, 2017 4:30 pm

You "can" but I wouldn't for anything that I'm sending to somebody else. The square profile pins are a bit fatter than the smaller turned pins and tend to overbend the contacts in IC sockets rendering them unreliable on normal chips. I've spent a lot of time trying to fix beebs that turned out to just have dodgy sockets, often cause by me jamming in appropriately sized things into them! The newer sockets with springier stainless steel / shiny (not sure of the material) springs seem to take it better the older dull nickel/zinc finished ones seems to fair worse though that may just be due to age or more cycles.

D

crj
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Re: What are these called?

Post by crj » Mon Jan 01, 2018 4:34 am

Also, most header pin strips aren't especially low profile.

Preci-dip round-pin headers space the board 3.5mm from the socket; I'd prefer a couple of mm less.

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