BCR Battery Replacement Question

I discovered this year that some of the older MTH stuff, around 96-97 has QSI reverse and sound boards but no battery.  These are pre Protosounds engines. It should work fine if both the boards are still OK.  My engine had a bad reverse board and would only run in reverse, but the sounds were fine.  GGG sold me a 'new' reverse board that he had saved and that fixed it right up.  Best of luck with it.  

That must be what I have... It's funny though that they put on the end flap of the box "ProtoSound DCRU reverse unit".  It's almost like they put an old version of the train in a newer version of the box which indicated ProtoSound.  As long as everything runs OK and I can't get the scrambled board/3 clangs of death stuff.

Thanks for your response!

Paul

There is no battery with the reverse only or the ones with the whistle/bell and reverse unit.

So this would be true even if the unit box indicated "ProtoSound DCRU reverse unit".  I guess this must be true because you can't replace a battery if there isn't one there! 

So even though I'm being redundant... there is no way that anything could get scrambled on this particular unit?

The MTH site states that 30-1025 was delivered in Aug 97 with a whistle.  It was part of a ready to run set.  

The DCRU is not a Proto Sound Board.  It is QSI bottom reverse board that uses a basic logic circuit for changing direction just like a anyone else's reverse unit.  No battery.

DCRU are used when a whistle or horn board is used.  Usually last number is -0 to indicate this.

MTH ProtoSound bottom board is a dumb board that MUST have a ProtoSound top board to function.  The Protosounn engines have a battery.

Now QSI did use the DCRU with a Power Supply board and a ProtoSound Top board to give fully sounds and other functions.  That did use a battery, but it was a 3 board stack.  G

I want to thank everyone for their replies.  Your responses have been most helpful.

Paul

QSIndustries (QSI) made the first successful 3-rail "O" Gauge electronic E-unit. Sounds came later, as previous posts state. It took a few years for MTH to adapt those units for full "Protosound."

After Proto-2 systems were introduced, previous systems were called "Proto-1." That name was not printed on boxes.

A few years ago I purchased a beautiful MTH Premier model of Southern Ps-4 No. 1401 in the Smithsonian (20-3006-1). Made in 1994, it had the first "Protosound (TM) Digital Sound Package / Designed by QSI." It worked with my ZW but not with newer transformers. I had suspected that. After a few emails, MTH Parts brought a circuit board from a RailKing Ps-4 made in 1997 to the York Meet. Wayne Renga of J and W Electronics installed it as well as a BCR. She runs like a Hamilton watch, and I gained Passenger Station Announcements (PSA).