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Hello,

I have an MTH Premier Hiawatha F7 Hudson (4-6-4) loco with earlier proto 2. The catalog number is 20-3096-1. This is before the "wireless draw bar" models and has a ten conductor cable in the tether.

A few years ago, operation became erratic and I had to re-solder the board on the locomotive's tether receptacle. Now the loco is operating intermittently again and the problem appears to be in the tender tether itself. I can move the tether cable slightly, while holding the plug steady, and make the cab light blink.

My questions are:

-what is the part number for the replacement tether?

-does the exact tether exist, or must I use MTH's universal replacement?

-what is the part number for the tether?

-from whom can I purchase a tether? I would like this to not be a many weeks long journey.

 

MTH shows the only ten pin tether to be a universal one and the part number is BC-1000002 . Is that all that is available?

 

Thanks everyone.

Last edited by RoyBoy
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The end that goes to the loco has 10 pins. There are a number of plugs in the tender, which I have not yet torn apart completely.

In the tender, there seems to be at least:

-9 pin plug with 6 wires

-5 pin plug with 2 wires

-7 pin plug with 4 wires

There may even be another plug under the board stack in the tender.

Good advice from Marty. I would plug the tether into the board before touching the pins with the soldering iron. I do it this way because I am A.R. The tether is a universal type, it comes from MTH with ten little heat shrink tubing sections, and all you have to do is match the color of the wires, splice and solder. I always try it before heat shrinking the tubing. The tender tether is not expensive, it runs around $8, I have two on order from MTH, if you can wait until I get it. Email in my profile.

Marty Fitzhenry posted:

I would start at the locomotive and touch up all 10 pins at the connector with a hot solder iron.  I have that engine and it has the 5 V board.  I plan on updating it with a PS-32 board and LED headlight.

That's what I did to "fix" it the last time. This time the problem seemed seemed to come from a different place, but I will probably have to spend more time troubleshooting it.

Would you re-solder the connections with the plug inserted or unplugged?

It does sound like you have a bad tether if you are sure the PCB is solid.  Many 5V systems had unique tethers while 3V used a universal external tether BC-0000217 which has a 10 pin connector on both ends.  Once angled and the other straight.  There is then an internal tether which has the 12, 8, 7, 5, 4 pin connectors for the PS-2 board and a 9 pin if mux present.  Best bet is the universal for that.   G

Last edited by GGG

Hello again. I got some time yesterday and checked out the locomotive. The problem seems to be resolved by re-soldering the connection pins on the PC board receptacle in the locomotive.

However, the board has been re-soldered/reworked too many times for me to be confident that it will stay fixed. I'm thinking it is time to replace the receptacle/PC board.

Does any one have one in stock they could sell to me, or at least know the part number?

Thanks again.

Last edited by RoyBoy

John,

It looks like the first one, but I was hoping to find one with the wires already attached. If that does not exist, then the one in the first picture is still better than the one I have.

What is the best way to order one? Email to MTH? Telephone call to MTH? Buy one from one of our repair technicians?

Last edited by RoyBoy

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