Lionel 6-11149 Legacy Big Boy Smoke Unit

Maybe from this board?  Take a looks and see if it's missing.

looks like the 220 uf 35-volt capacitor fell off the board did you try soldering it back on! Alan

just make sure you mount it correct it is polarity sensitive!!!! Alan

From the looks of the contacts, I would not recommend trying to solder this one back on!

This is a pretty common size capacitor, if you find where one goes, drop me a line and I can send you a couple.

There's no certainty that this would return it to operation, that cap looks like a lot of oxidation occurred on the leads, I suspect either the flux didn't get cleaned during manufacturing, or something has contaminated the board.

The smoke unit wouldn't have such a cap, but the board Marty posted does indeed have that cap on it.

@gunrunnerjohn posted:

The smoke unit wouldn't have such a cap, but the board Marty posted does indeed have that cap on it.

The board Marty posted is from a vision line big boy.

Joes test subject is a Lionmaster bigboy with the first gen Legacy electronics.

These engines also came with the 6ohm resistor in the smoke unit,  as well as the AC regulator that dies because of the overtaxing.

@RickO posted:

The board Marty posted is from a vision line big boy.

Joes test subject is a Lionmaster bigboy with the first gen Legacy electronics.

These engines also came with the 6ohm resistor in the smoke unit,  as well as the AC regulator that dies because of the overtaxing.

You're right, that's what I get for not looking up the product number!  That also explains why the leads look like they do!  It did indeed come from the smoke unit.

The cap can be replaced, and as mentioned, the 6 ohm resistor should be swapped for an 8 ohm resistor, the regulators are not available, so you want to baby the one you have!

@RickO posted:

The board Marty posted is from a vision line big boy.

Joes test subject is a Lionmaster bigboy with the first gen Legacy electronics.

These engines also came with the 6ohm resistor in the smoke unit,  as well as the AC regulator that dies because of the overtaxing.

Thanks Rick.  I should have done a better job paying attention.

@MartyE posted:

Thanks Rick.  I should have done a better job paying attention.

You got me too Marty.

@MartyE posted:

Thanks Rick.  I should have done a better job paying attention.

Been there...done that! Especially when my Wife is speaking! 🤣

For reference, see this write up that I posted a while back:

https://ogrforum.com/...2#160504834994956502

Thanks guys.

John, I felt the same way you did about the condition of the contacts on the capacitor.

Joe, that cap looked pretty ugly.  However, I have some of the right sized 220uf caps if you need one.