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I have a replacement chip for EOB boards that might be of interest to forum members.  It fixes two of the most complained about features,. It removes the EOB squeal and has a quicker response time.    It does loose the ability to run in cruise mode when in conventional mode.

I have upgraded most of my diesel locomotives, and have been pleased with the results.

This is a completely new code base, and uses a different microprocessor chip.  You would have to be able to remove the old chip and insert the new one.

I am considering ordering a batch of chips to program up, and sell at $25 each (shipped).  So if any of you are interested in this, respond here.  If there is enough response, I will put in an order for some chips.

The attached video shows the new chip in 5 engines lashed together, with sounds off.

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Five engines lashed together
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You mentioned the cruise in conventional no longer functions in your Diesel engines.  How about steam engines and EOB’s ability to set different chuff rates?  To me that was a major advantage of EOB when upgrading a TMCC steam engine that only had 2 chuffs/rev.  I have several steamers with this upgrade and do not want to lose the 4 cuffs/rev.

Last edited by CAPPilot

I must have at least 10 EOB equipped engines and this would be a great upgrade to do on them. I would be in for two initially to try out before committing for the rest.

I would also like to know if the new chips would affect the adjustable chuff rate on steamers. Also will you still have to or be able to do the pre and post pulse adjustments?

Would the chip work on Drop In EOB boards?

Ken

Sounds like there is enough interest to get at least a first batch of chips.

Faster response rate is about twice as fast as the original EOB.  May go a little faster on that, but want to keep it smooth.

You can still program the chuff rate for steam, if an external chuff is not used.

If you are doing lash-ups, you would have to make sure the tack strips are the same so the engines don't fight each other. 

Yes, they will work in a drop in board.

I will do some final tweaks and order some chips.  Final version will probably be ready in a couple of weeks.

@JackO posted:

Pardon the thread interruption... What's EOB?

EOB was Train America Studio, Mike Reagan, Youngstown, Ohio, at the time.   A speed control, drive board, that was motor flywheel tach-strip oriented.  There were upgrade kits available, and some relatively good install instructions, for do-it-yourself.  Down-side acceleration/deceleration was not linear, more of a parabolic curve type of acceleration. There was also a high pitched whine, that for some was a concern.  Back on the positive side, mother boards had pretty good circuit design, with a full 8 amp capacity.  IMO,  Mike CT.   Installed in a set of Weaver E8's that I have.  At one time the SAW group, Sunset, Atlas, and Weaver, used these drive boards.   Link to EOB install instruction from this forum, complete with the many different adjustments.  Click on the underlined phrase,  Cab1 remote, TMCC command base adjustments.   ?? page 27 to the end of the document??

Last edited by Mike CT
@bkbob posted:

Sounds like there is enough interest to get at least a first batch of chips.

Faster response rate is about twice as fast as the original EOB.  May go a little faster on that, but want to keep it smooth.

You can still program the chuff rate for steam, if an external chuff is not used.

If you are doing lash-ups, you would have to make sure the tack strips are the same so the engines don't fight each other.

Yes, they will work in a drop in board.

I will do some final tweaks and order some chips.  Final version will probably be ready in a couple of weeks.

One thing I like about EOB, is how slow they start out.  I like engines that can crawl.  Long as that is retain I'll be interested.

Hey guys, I think I am close to a final version.  I would like to get a couple of volunteers (3 or 4 of you) to try out the chips, and let me know how they work for you.

I would send you two chips to try out in a couple of your engines.  All I ask is that you respond directly to me if there are any issues, so I can get them fixed before distributing more.  We might have to go through a couple of revisions if there are too many problems, but I am crossing my fingers. 

Most of my tests have been in diesels where the squeal of older EOB chips is more pronounced.

Once we get a final version that is acceptable, you can post the results and impressions here.  The more varied engine types you can try them out in the better.  You have to be comfortable in replacing a dip package IC on the EOB board to give the new chip a try.

If you are interested, and can get  me some feedback within 2 weeks, email me directly.  The first 3 or 4 of you that email me will get to test them out.  I would prefer someone with a large number (6+) EOB engines so that they can try the chips out in as many different engine types as possible.  Thanks.

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