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...wha...?

2 separate things here. 

First off (and I know I've asked this before): why do my TMCC steamers smoke better when I use an American Flyer 15B than using an MRC "Dual Power  027"? Speed control is about the same, but the smoke output is greater when using the old AF transformer...seems odd to me, especially since the engines and the MRC are of a similar vintage (1999-2000).

JB Weld: I recently picked a brand new, unopened K-Line 2 bay die cast hopper: I have several others like it, nice models. Upon opening the box, I could see that one of the couplers looked askew, and sure enough, it was completely loose. The truck frame was broken, the entire truck was in pieces and my first thought was "zinc pest". Then I noticed that the silica gel pack had been crammed into that end of the car (very tightly) and I believe it was that "cramming" action that broke the truck. My other K-Line cars have always had the gel packs next to (but outside of) the cars. Since all the parts were there (and it was a couple of clean breaks) I decided to at least attempt a repair.

s-l1600 [1)

First I completely dis-assembled the truck (don't loose those springs!) then kinda squared up the side frames with the broken bolster/coupler piece. ACC was first applied (just to hold it all together) then after that set, I applied the JB Weld to those same areas and let it set up for the 24 hour recommended time.  

Complete reassembly then took place and so far (it's been a few days now), it has held up to normal usage just fine.

Good stuff, that. 

Mark in Oregon

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Last edited by Strummer
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Make a silicone mold and pack it full🤔sideframes anyhow😉

I filled 1/3 of the front + corner of a tender, steps and all from 5min JB. Wait for it to gel set, and sculpt with wet tools, plastic wrap, etc.. One you see a crack start, press it back and stop asap. Machine/grind and lay in a new section/layer if needed.

Careful mixing and it'll color match.

@Adriatic posted:

Doesn't MRC chop that real sine?  That equals more off time. 0v for a half an ac cycle. The AF power is a smooth natural sine wave with less time at 0v.

That would explain it, thanks.

That being the case, I'm wondering if there might be a transformer available that would not only have the "full sine wave", but also feature control buttons for both the bell and whistle. I have a small MRC O27 pack and a Lionel model "S", but they only have the "whistle" control, not both "whistle" and "bell"...

Mark in Oregon

 

A #90 buttom and $3 in diiodes.  (50 would be $10-15)

You will lose about 1.5v volts to this off full throttle.That may never happen atv24v lol (?)

It It could take a couple more diodes on each series chain if the diodes are very efficient ones, but all of my boards pick up two series pairs, often one pair is enough

This will wake up your modern bells. Flip leads if it works the whistle when tried.(ah the #2 of "wire#2" jumped out of place, oh well.)

Diodes are going to get too hot to touch at times thats normal. 6a diodes might be a bit cooler. 

 

sketch-1595448197076

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