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John, are you leaving the original RSII sound or upgrading that as well?
This conversion looks fantastic and further inspires me to tear mine down and rebuild it.

Sadly, the original RS2 board does not read the chuff from the serial data stream, so I can't use it.  I'm digging through my stock of RS4 boards to see what I'll use for sounds.

Sadly, the original RS2 board does not read the chuff from the serial data stream, so I can't use it.  I'm digging through my stock of RS4 boards to see what I'll use for sounds.

It's not the board, it's the PIC chip.

If you have an RS25 S24 PIC, that one accepts the chuff on the serial line and is compatible with the C&O ROM. The steam sound ROMs were changed slightly when paired with RS27 PICs, so anything newer than the RS25 S24 with an older ROM can occasionally produce some odd behavior.

And for the record, that's a RS2.5 board in the Yellowbelly. RS2 is a totally different animal.

TRW

@PaperTRW posted:

If you have an RS25 S24 PIC, that one accepts the chuff on the serial line and is compatible with the C&O ROM. The steam sound ROMs were changed slightly when paired with RS27 PICs, so anything newer than the RS25 S24 with an older ROM can occasionally produce some odd behavior.

I didn't realize I could swap out the PIC chip and keep the sounds, I'll give that a try and see if it solves that issue.

THANKS!

Well... that  was a bust.  Apparently, I don't have a single RS25 PIC chip, but I have a zillion of the RS27 chips.  As stated, the RS27 chips do odd things.  Close, but no cigar.

@PaperTRW posted:

If you have an RS25 S24 PIC, that one accepts the chuff on the serial line and is compatible with the C&O ROM. The steam sound ROMs were changed slightly when paired with RS27 PICs, so anything newer than the RS25 S24 with an older ROM can occasionally produce some odd behavior.

Do you have the RS24S24 PIC?  I'd like to find one and see if this works out.

The Commodore Vanderbilt. There’s been a few overhauls of this engine lately so obviously there’s a way to use the RS2.5 with the ERR board

You can, feed the RS2.5 power, ground, serial & chuff , and she’ll come right to life, only caveat, chuff in is on separate line…….you don’t feed chuff in to the radio board, ( the radio board on the ERR Cruise Commander) go straight from whatever your chuff switch source is, to the light blue chuff in wire on the RS2.5 that’s used in the CV …..all we’ve been doing is using better, modern speakers, and the old RS2.5 cleans up incredibly …..Legacy, Shmegacy, …..

Pat

@harmonyards posted:

You can, feed the RS2.5 power, ground, serial & chuff , and she’ll come right to life, only caveat, chuff in is on separate line…….you don’t feed chuff in to the radio board, ( the radio board on the ERR Cruise Commander) go straight from whatever your chuff switch source is, to the light blue chuff in wire on the RS2.5 that’s used in the CV …..all we’ve been doing is using better, modern speakers, and the old RS2.5 cleans up incredibly …..Legacy, Shmegacy, …..

Pat

Pat, did you miss the part where I'm using a wireless IR drawbar link?

Do you have the RS24S24 PIC?  I'd like to find one and see if this works out.

I can provide an RS25 S24 PIC. Have a spare PIC in the RS27 S23 family to trade?

So does the CV Rs2.5 board have the correct PIC chip for this to work? When I upgrade my yellow belly, I’d like to change the sound board to the CV board since I like the NYC whistle much better than the whistle used on the C&O board

No, the CV RS2.5 board has the same issue with an RS25 S12 PIC. It will recognize a direct chuff trigger just fine -- microswitch, reed switch, hall effect sensor, etc. -- but doesn't see the chuff along the serial line as these locomotives were produced before the first wireless tethers. The RS25 S24 PIC was created for the first wireless tether locomotives in 1997, and therefore recognizes a chuff in the serial data.

The PIC substitute will work for your CV as well.

TRW

Last edited by PaperTRW

Terrific thread John, I love the engine and your's and Pat's work is impeccable, I really love what you've done and how you did it.  As for value, it's given me all kinds of ideas for some of my engines, now all it takes is the $$ to get them done.  Beautiful engine, I love it.
Sorry to hear about your back, that can be extremely painful, I hope you get to feeling much better soon.

@rplst8 posted:

Not trying to nit pick, and I know you said you were still working on the sound, but I rewatched the video and seems like the drivers are moving faster than the chuff and that the stack puffs aren’t in sync either. I might just be a youtube playback oddity too.

I can assure you that the chuffing is in time with the sounds in reality.  It's hard to tell going by at speed, but it has 4-chuffs/rev as well.  If the sounds and smoke aren't sync'ed, that would mean the 1,000+ Super-Chuffer/Chuff-Generator combos that have shipped would have the same problem, surely I'd have heard about that!

The only "work" on the sound coming is replacing the sound board that's in it with the original Yellowbelly RS chip as it has a really nice whistle.  I'm just waiting on a compatible PIC chip for the RS set.

@rplst8 posted:

Not trying to nit pick, and I know you said you were still working on the sound, but I rewatched the video and seems like the drivers are moving faster than the chuff and that the stack puffs aren’t in sync either. I might just be a youtube playback oddity too.

The chuff sound, and the puff out the exhaust all come from the same signal Ryan, …it’d be a real challenge to get them out of sync,…..it’s all fed off one line …

Pat

I can assure you that the chuffing is in time with the sounds in reality.  It's hard to tell going by at speed, but it has 4-chuffs/rev as well.  If the sounds and smoke aren't sync'ed, that would mean the 1,000+ Super-Chuffer/Chuff-Generator combos that have shipped would have the same problem, surely I'd have heard about that!

The only "work" on the sound coming is replacing the sound board that's in it with the original Yellowbelly RS chip as it has a really nice whistle.  I'm just waiting on a compatible PIC chip for the RS set.

@harmonyards posted:

The chuff sound, and the puff out the exhaust all come from the same signal Ryan, …it’d be a real challenge to get them out of sync,…..it’s all fed off one line …

Yeah I think the speed it was moving at and the video lag was just throwing me off.

P.S. @gunrunnerjohn I might have one of those later RS25 chips if you still need one. I saw someone else replied, but if it falls through let me know and I'll check.

@coach joe posted:

Incredible work on both ends.  Looks, runs, and sounds great!

"John, great work!….looks like she’s up to modern standards now!!…..let’s do another!!….😉

Pat".  Please do, I love seeing what you guys can do.

Coach, if you haven't started following Pat, it may be a good idea. Pat is getting close to retirement, which means that there will be a whole host of "Tales from the Harmon Shops" coming for sure. As John pointed out, he's working on doing the PRR's S2 Turbine which should be pretty interesting.

Coach, if you haven't started following Pat, it may be a good idea. Pat is getting close to retirement, which means that there will be a whole host of "Tales from the Harmon Shops" coming for sure. As John pointed out, he's working on doing the PRR's S2 Turbine which should be pretty interesting.

287 days to be exact, …..usually I don’t wish time away, but I’ll make an exception this time, …..it can’t come quick enough…..

Pat

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