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External resistor - connector question


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#1 mreibman

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Posted 03 January 2020 - 10:26 AM

Ok, I have several old external resistor controllers, DiFalco, Koford, Parma, etc.

 

What I would like to do is to remove the resistor, and put a modular connector on the cables, and put the opposite gender connector on the wires to the resistor - so I can use 1 controller and change the resistor in short order.t

 

I'm concerned about the amps I would need to be rated for in the connector, I thought 10A would be a safe bet.

 

Has anyone done this, and if so, what connectors would be recommended to do it? I have considered using a computer ATX power connector extension (20 or 24 pin) but I figure to only need about 8-12 pins at most.

 

Thanks in advance!

Mike

 


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#2 Fred Zufelt

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Posted 03 January 2020 - 02:36 PM

I would think most connector would take 10 amps or so.

 

Unless you are running the real amp suckers

 

I like your idea of the power supply connector one plug and you are ready to go. An electronics store may have a connector closer to the number you need.

 

When I built my own external resistor controller (70'sLOL) I used a major wattage resistor with movable taps so if you needed a lower resistance you just moved the taps closer to the end so you didn't need multiple resistor. maybe Ho to group 12 may need a new resistor.

 

For single connector look at the RC world for their tube type ( 4mm and 5mm use shrink tubing) high current in the 30 and more amps

 

Fred Z



#3 old & gray

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Posted 03 January 2020 - 06:52 PM

I remember someone doing this in the 90's be for electronic controllers.

 

Try automotive connectors they should have enough current capacity.


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#4 John Streisguth

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Posted 03 January 2020 - 07:14 PM

something like this? 

 

1699n24p1-d01b-digital@halfx_63629585790
Eight Pole
1699n26p1-d01b-digital@halfx_63629503662
Nine Pole
1699n28p1-d01b-digital@halfx_63629585794
Ten Pole
1699n31p1-d01b-digital@halfx_63629523296
Twelve Pole
1699n33p1-d01b-digital@halfx_63629585804

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#5 philk

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Posted 04 January 2020 - 12:15 AM

1, 2 and 3 ohm on plugs.

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#6 philk

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Posted 04 January 2020 - 12:16 AM

Connector pic, these might be Molex connectors , Allied Electronics and maybe others sell them.

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#7 Jim Difalco

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Posted 04 January 2020 - 07:04 AM

Did we just enter a time warp back to the 1980's?  External resistors? The Molex type connectors should be fine. They are usually made in 2 different pin sizes for standard and higher amp applications if I remember correctly.

 

I have the special crimper for the pins and an extractor to remove them but you can do it with just soldering the wires. Get them in the right place as they are a pain to remove the pins without an extractor.


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Jim Difalco
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3075 NE Loquat Lane
Jensen Beach, FL 34957
(772) 334-1987
askjim@difalcoonline.com


#8 philk

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Posted 04 January 2020 - 11:56 AM

LOL, I loved the 80’s.
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#9 mreibman

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Posted 04 January 2020 - 05:11 PM

So thanks for the input... I think those are molex.

The computer connectors are a micro molex.

And yes, it is a time warp. These are for play more than race.

Mike Reibman
Alleged amateur racer
Mostly just play with lots of cars.
Able to maintain slot cars with a single bound.
Faster than a speeding womp.
More powerful than a 36D
 
 






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