6-28228 Northwestern 8669 Dash 9 Blinking rear light, coupler opens

Chuck, what do you mean that the rear pick up roller make noise?

Are you running this in Legacy, TMCC or  Conv?

TMCC. I didn't say REAR pickup roller, I said THE pickup rollers. What i think is that the rollers make and break slightly as the engine runs along the track...and the rear light blinks and the rear coupler opens randomly. The rollers making electrical noise is nothing new and is to be expected, but it doesn't usually cause this much blinking and coupler opening. If the engine sits still, there is no blinking but the light if on when the engine stopped, stays on...until it moves again. There is also a brief sound dropout for a half second sometimes...even with a 9 volt battery installed.

What could cause the, I guess, increased sensitivity to noise...if I have it guessed right?

cjack posted:

TMCC. I didn't say REAR pickup roller, I said THE pickup rollers. What i think is that the rollers make and break slightly as the engine runs along the track...and the rear light blinks and the rear coupler opens randomly. The rollers making electrical noise is nothing new and is to be expected, but it doesn't usually cause this much blinking and coupler opening. If the engine sits still, there is no blinking but the light if on when the engine stopped, stays on...until it moves again. There is also a brief sound dropout for a half second sometimes...even with a 9 volt battery installed.

What could cause the, I guess, increased sensitivity to noise...if I have it guessed right?

Check this thread.

https://ogrforum.com/t...pening-spontaneously

I don't have the exact details at hand, but weren't there some TMCC engines of this rough vintage that had the opening coupler issue?  Am I right in guessing this is a pul-mor based engine?  I think there might have been a fix involving installing a cap to stop the coupler from firing randomly.

Maybe this thread?  Or this one?  (I was typing/reading while Bruce was, I guess ... )

-Dave

Not pulmor, but the cap across the coupler is sometimes a help.

I'm wondering if there is a better way to reduce the source of the noise rather than the results. Like some filter on the power pickup rather than a cap on the coupler. And there is also the issue of the blinking rear light which I heard was also a result of noise.