Hi everyone , I want to get some jst connectors for my Bachmann Spectrum engine ( s ) , I have a couple that have bad connections. As near as I can tell they use a jst tpye connector but of course there are many different sizes to choose from, so the question is from the connector I have on my engine how or where do I measure to determine which size it is ? I know Amazon has some 1.25mm and 2.0 mm jst connectors but I'm not sure which if either would be correct. Thanks appreciate any and all help.
Lynn
Present Layout progress
http://cs.trains.com/mrr/f/11/p/290127/3372174.aspx#3372174
Lynn,
The 1.25mm and the 2.0mm should be the center-to-center spacing (pitch) between the contacts. Then it's a question whether it's a 1- or 2-by connector - 1 x 3 or 2 x 4.
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
You have to be very careful measuring the pitch between pins. JST makes 1mm, 1.25mm, 1.5mm and so on. On several orders I’ve missed by .25mm even using my digital micrometer.As a result I now stock all the smaller JST connectors, they’re cheap off eBay.Mel My Model Railroad http://melvineperry.blogspot.com/ Bakersfield, California Turned 84 in July, aging is definitely not for wimps.
Thanks guys this is very helpful information , would this pic I posted be a 1mm pin to pin ?
Mel what did you end up going with and for which locomotive?
ok after remeasuring the pins in the locomotive socket and taking Mels advice i think it actually may be a 1.25 mm
You could check and see if a site like digikey has them in stock. Then you can just buy a few of each, super cheap, and shipping is generally $4-$6 if first class and under 8oz or whatever their limit is. I get all of them from them, unless happens to be out of stock, then I check elswhere. I usually order 300-400 though each time as I go through them when upgrading older BLI engines, etc. for people. But the sites like this, you can buy 1 or buy 10,000, etc. So they are not like a bulk only site.
tsd You could check and see if a site like digikey has them in stock. Then you can just buy a few of each, super cheap, and shipping is generally $4-$6 if first class and under 8oz or whatever their limit is. I get all of them from them, unless happens to be out of stock, then I check elswhere. I usually order 300-400 though each time as I go through them when upgrading older BLI engines, etc. for people. But the sites like this, you can buy 1 or buy 10,000, etc. So they are not like a bulk only site.
Yes I've done quite a bit of ordering from Digikey when I was refurbing my vintage Marantz. I will give them a check.
edit: checked Digikey , no 1.25mm at all.
0.25mm is 0.010", which is very difficult to tell apart.
To find center-to-center pin distance I would measure outside both pins then subtract the width of one of the pins.
-Kevin
Living the dream.
I don’t remember which size fits which, I stock the smaller connectors in 2 to 6 pin and just use the one that fits.
Sorry but at 84 I’m doing good to remember my name. Just use the JST Series (GH plus the number of pins)Mel My Model Railroad http://melvineperry.blogspot.com/ Bakersfield, California Turned 84 in July, aging is definitely not for wimps.
Thanks guys , Ok found some 1.25mm 2pin on Amazon , I'll order those and see if they work and go from there.
I just keep one of each size, male and female, on the bench and use them as a quick gauge.