Looks like a standard JST PH4 connector

https://www.adafruit.com/product/3950

Thanks! Now to find a 4-pin molex to JST PH4 connector...

Artex wrote on 2021-02-08, 02:01:

Thanks! Now to find a 4-pin molex to JST PH4 connector...

Or you could ... splice the PH4 cable together with the molex cable you still have. Just make sure the 5v goes to the 5v pin and the 12v goes to the 12v pin
...

or just crimp the JST-PH yourself? ^^

Both are definitely options as I cannot seem to find this cable myself (was hoping for the easy way). I did pick up a molex crimping tool but I do have some questions as I haven't had much success, instead just destroying some pins as I'm a novice.

This is the crimping tool I bought:
https://www.amazon.com/gp/product/B089LW7MWT/ … 0?ie=UTF8&psc=1

And the pins (.093):
https://www.amazon.com/gp/product/B07V478FN8/ … 0?ie=UTF8&psc=1

I have a molex extractor tool for .062 and .093 pins:
https://www.amazon.com/Connector-Remover-Comp … s%2C178&sr=8-14

The standard 4-pin AMP connector we all are used to in this retro hobby, can someone confirm the following?

• Are the female connector versions (with the male pins) model 8981?

• Are the male connector versions (with the female pins) model Mate-n-Lok 1-480424-0

And for the pins:

• I understand there are .062 versions and .093 - which are used most commonly in these AMP connectors?

• Is there a model # for these pins?

The problem I am running into is the question of these little metal 'sides' that are left when you cut the connectors out. What do you do with these?

For an older AT power supply, I was not able to fit the .093 pins inside of the amp connector. It seemed to get 'stuck' and I wasn't sure if it was due to the pin size or if it was the little metal pieces left over from cutting the pins from the 'chain' they were attached to.

• Will this crimping tool work for those JST PH4 (4-pin) connectors?

• Can someone point me in the right direction on the pins and connector to buy (and crimping tool if I need one different from what I have?)

Artex wrote on 2021-02-08, 15:57:

The problem I am running into is the question of these little metal 'sides' that are left when you cut the connectors out. What […]
Show full quote

The problem I am running into is the question of these little metal 'sides' that are left when you cut the connectors out. What do you do with these?

For an older AT power supply, I was not able to fit the .093 pins inside of the amp connector. It seemed to get 'stuck' and I wasn't sure if it was due to the pin size or if it was the little metal pieces left over from cutting the pins from the 'chain' they were attached to.

• Will this crimping tool work for those JST PH4 (4-pin) connectors?

• Can someone point me in the right direction on the pins and connector to buy (and crimping tool if I need one different from what I have?)

No idea about the model numbers or sizes, but normally... those metal sides you indicate in the photo clamp the copper conductor, and the lower metal sides clamp the insulation of the wire. (not 100% certain though)
edit: just looked at the pins you bought and it seems like those metal sides are just leftovers from the strip the connectors came on. so, just bend'm over when they're in the way would be my response.

I have never crimped AMP connectors myself, but an easier route would probably to take a premade computer cable with the right connector and thinner cables and just crimp the JST-PH connector onto that... that crimping tool looks pretty bad imho, and not like it has the correct jaws, they need to have kind of a "W" shape to fold over the "little metal sides" as you called them of the connector.

I have a Engineer PA-09 universal crimper, it's not the easiest to use but works for a wide range of connectors and should work fine with JST-PH, most likely too small for AMP connectors though.

Well, you made me curious and... from the wikipedia...

https://en.wikipedia.org/wiki/Molex_connector

There are three typical pin sizes: 1.57 mm (0.062 in), 2.13 mm (0.084 in), and 2.36 mm (0.093 in).

Guess which ones a pc uses... it's the middle one. I pulled one out of a connector, measured it and it came in at 2mm (0.078 in) though they were heavily used.

weedeewee wrote on 2021-02-08, 16:35:

Well, you made me curious and... from the wikipedia... […]
Show full quote

Well, you made me curious and... from the wikipedia...

https://en.wikipedia.org/wiki/Molex_connector

There are three typical pin sizes: 1.57 mm (0.062 in), 2.13 mm (0.084 in), and 2.36 mm (0.093 in).

Guess which ones a pc uses... it's the middle one. I pulled one out of a connector, measured it and it came in at 2mm (0.078 in) though they were heavily used.

Interesting... well there's my problem then! Thanks for taking the time to check - I'm glad I'm not going nuts here!

imi wrote on 2021-02-08, 16:17:

I have never crimped AMP connectors myself, but an easier route would probably to take a premade computer cable with the right connector and thinner cables and just crimp the JST-PH connector onto that... that crimping tool looks pretty bad imho, and not like it has the correct jaws, they need to have kind of a "W" shape to fold over the "little metal sides" as you called them of the connector.

I have a Engineer PA-09 universal crimper, it's not the easiest to use but works for a wide range of connectors and should work fine with JST-PH, most likely too small for AMP connectors though.

Yeah, I wasn't quite sure on the quality tbh. So far I've been able to crimp my .093 pins with it but apparently these are the wrong size anyway. 😜

I also have a PA-09, it's a quality tool but useful only up to AWG 22 wire (I have done some AWG 20 but it's a stretch).

What I usually do is crimp the conductor part and make sure it's a secure connection, and then I crimp the isolation. Some specific tools can crimp both at the same time, but with generic tools that's the way to go.

And I always make sure to buy excess pins since I often mess a few of them up, especially for connectors I am unfamiliar with. Lots of trial and error!

TheMobRules wrote on 2021-02-08, 20:21:

And I always make sure to buy excess pins since I often mess a few of them up, especially for connectors I am unfamiliar with. Lots of trial and error!

So I've learned! 😀
I think I'm just going to try to source a bunch of the male version of the JST-PH 4-pin 2mm connectors and try my luck. I just bought the PA-09, PA-20 and PA-21 crimpers and I'll return what I don't need for crimping AMP and the JST PH connectors (Amazon makes it too easy!). From there I'll just use the multimeter and figure out the +12 and +5V - that part should be easy given the orientation of the existing plug and notations on the PCB of the LCD.

I think this is what I need?
https://www.ebay.com/itm/JST-PH-2-0mm-Pitch-4 … MYAAOSwxphbHzHK

Artex wrote on 2021-02-08, 21:02:

I think this is what I need?
https://www.ebay.com/itm/JST-PH-2-0mm-Pitch-4 … MYAAOSwxphbHzHK

definitely looks like it. Origin hong kong, could take a while for delivery.

weedeewee wrote on 2021-02-08, 21:23:

Artex wrote on 2021-02-08, 21:02:

I think this is what I need?
https://www.ebay.com/itm/JST-PH-2-0mm-Pitch-4 … MYAAOSwxphbHzHK

definitely looks like it. Origin hong kong, could take a while for delivery.

Done and Done. With COVID I have all the time in the world. 😜

any local electronic components dealer should have those ^^

Artex wrote on 2021-02-08, 21:02:

I think this is what I need?
https://www.ebay.com/itm/JST-PH-2-0mm-Pitch-4 … MYAAOSwxphbHzHK

Maybe I am making this more complex than it is but the PH and XH series are 'look alike' except for the pitch of respectively 2.0 and 2.5 mm.
Did you measure your sample ?
https://en.wikipedia.org/wiki/JST_connector

https://www.jst-mfg.com/product/detail_e.php?series=199

https://www.jst-mfg.com/product/detail_e.php?series=277

XH has the notches on the outside while PH has it in the middle like in the pictures posted.

Oh, ok. I didn't know they are identifiable by exterior.
When trying to figure out the front connectors on a case I ran into the variation that is out there.