What plug for connecting BLI "Gopack"?

[Maletrain]

What is the plug that comes on the BLI "GoPAck" to plug into the socket on the Stealth mother boards in HO locos?

I want to put some sort of keep-alive into an HO BLI GP35, but there is not enough room for the BLI GoPack.  So, I want to try to use a smaller TCS version.  That comes without any plug.  I would like to add a plug to make it "plug-n-play", rather than solder it to the motherboard.

Anybody figured this out already?

[Rasputen]

I'm pretty sure it is a 3 pin JST connector, probably with a 1.0 mm pitch but I'm guessing about that part.
Crimping your own pins on is not easy but I have seen wires available with the pins already crimped on.

[Lemosteam]

You could make your own male plug using breadboard jumpers. Put some Kapton tape over the end of the filament plug, insert each wire thru the kapton into the plug, and then use hot glue to make a housing around the wires, let it cool and pull the new plug out of the socket and remove the tape. Color code the jumpers if possible so the connection does not become reversed.

[Maletrain]

The plug I am looking for is smaller than what fits the other sockets on the board, with finer pins.  I am wishing I had tried to measure the pin pitch while I had the shell off. (The videos of others removing their shells were obviously using shells they had previously loosened up - it takes a while.)

Here is a video of the plug and socket - go to 5:00 on the time slider:

.
Here is another - go to time 5:40 :

[Rasputen]

That's probably a 0.8mm pitch connector then.  I don't think they come any smaller.

[Maletrain]

I took the shell off again (much easier the second time, using the alternating-pressure-on-the-ends technique) and measured the pitch of the pins on the J9 connector for attaching the GOPACK.  Its pitch is only 0.85 mm, compared to the 1.0 mm on the next larger size used on that board.

I am not finding plugs with 0.85 mm pitch.

[Sumner]

I am not finding plugs with 0.85 mm pitch.

They don't show a 0.85 pitch but do show 0.80 pitch as @Rasputen mentioned.

See if this helps....

https://www.jst-mfg.com/product/index.php?series=605

https://www.jst-mfg.com/product/pdf/eng/eSUH.pdf?6819177a3e0a5

Sumner

[Maletrain]

Thanks, Sumner, I think you put me on the right track.

I had measured the pin pitch by eye, using a digital caliper and 10X loop, and got 0.85 mm as close as I could read it.  Then looked at Mouser, Digikey, and MPJS and found other (computer) type connectors with that pitch, so assumed that was the correct value.  But nothing like a JST connector was listed in that pitch.  Strangely, my searches did turn up plugs, including JSTs, in other pitches.  SO, it seems odd that JSTs in 0.80 mm did not come up for me, too.  Since I was not sure it was a JST plug, I did not try to search by individual vendor websites.

Anyway, the links you provided do look similar.  The sockets on the BLI board have the wires coming in perpendicular instead of parallel to the mount surface.  I see that there are other connectors like that in you link.  I tried searching for  SUHR-03 and started getting some hits.  But, it is going to take me some more searching, because the hits I am getting not only don't have any wires attached, they don't even have contacts in the plastic parts.

[peteski]

If it is a JST 0.8mm pitch connector then Digikey sells those with pigtail wires attached.  I found them for Atlas E24 boards.

The N scale Paragon decoders also use JST 0.8mm pitch connectors.

[Maletrain]

Apparently I don't even have a white belt in Digikey-Fu, because I cannot get anything but the connector housing to come up, no matter whether I search for cables or search the whole site.

So, Peteski, if you still have a link or a Digikey part number, I would appreciate you posting that for me.

[peteski]

Steve,
I just checked couple of the decoders in my N scale BLI locos and they seem to use multiple connector types.  The Paragon decoder in an older PRR Centipede loco uses connectors with 1mm spacing but the newer loco uses 0.8mm connectors.  There are no 0.85 mm pitch connectors. I suppose you could take sharp photo of the male socket on the decoder board and post it here.

If they do have 0.8mm spacing this is probably what you're looking for (yes, it is not easy to find as it is called a "cable assembly"). 
https://www.digikey.com/en/products/detail/jst-sales-america-inc/A03SUR03SUR32W305A/6708430
You cut the wire to get 2 assemblies with pigtails.  They also sell a 2" long version but it is only few cents cheaper.

[Maletrain]

Thank you Peteski !!!

I will order one and report back whether it fits.  It does look right so far as I can tell from the photos.

[Maletrain]

To put the finishing cap on this thread, the plug that Peteski found for me is the correct one: https://www.digikey.com/en/products/detail/jst-sales-america-inc/A03SUR03SUR32W305A/6708430

It is now installed, connecting a Iowa Scaled Engineering "Run-N-Smooth" to the Blunami decoder.  That is only about 940 uF, so I am not sure it will do much for the HO loco.  But, it is the biggest I can get in there without milling the frame.  YouTube has videos of that and the lower capacitance TCS KA-N1 doing some good in HO locos.