comet Models Ivatt 2 with SDW LMS Mogul chip

1732 Views 6 Replies 3 Participants Last post by 80class, Jun 2, 2008

Carnforth

Discussion Starter · Apr 25, 2008

Afternoon all
Just finished this and thought you might like to see it.
Comet Models excellent Ivatt 2 kit fitted with SWD LMS Mogul ESU sound chip in the boiler, ahead of the vertical motor with a DCC Supplies base-reflex speaker in the tender.Not the best filming in the world but I couldn't drive both at the same time! Link to vid should be here

Steve.

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dwb

· #2 · Apr 25, 2008

Very nice. I particularly like the whistle.

David

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Carnforth

Discussion Starter · #3 · Apr 26, 2008

Thanks David
When ordering this chip you can/should specify BR Whistle OR LMS ( Stanier) type hooter, which the Ivatts carried. Now it has dawned on me that this LMS chip has many possible 2 cyl. applications. Stanier/Fairburn/ Ivatt tanks, Ivatt Class 4 Mogul, and obviously Staniers' class 5/8, simply re-synched using CVs 57/58 to suit wheel diameter and achieve 4 beats per cycle. Interestingly, AFAIK, the only Stanier design not to use his distinctive hooter was his design Mogul, which used the Midland whistle, probably as a result of following the "Crabs" and Horwich practise.
The video really doesn't do justice to the beefiness of the sound from the tender fitted base/reflex speaker. That said, there's a part kit-built Black 5 on the bench with a sound chip from Howes which features a VERY impressive sequence of loose coupled wagon buffer-clash. This will have two 23mm speakers in the tender. A video of that will appear when it's complete.
Steve.

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dwb

· #4 · Apr 26, 2008

Thanks for the extra info. I have a Bachmann class 2 and the reflex speaker. I just haven't got round to getting a sound chip yet.

QUOTE The video really doesn't do justice to the beefiness of the sound from the tender fitted base/reflex speaker
That's not the first time a comment like that has been made. Doug has said the same about the Deltic recording. I don't think it's the playback facility because the "Three deltic" clip he posted with the sound review had plenty of bass which got my sub woofer going. From that I conclude that the mike that comes standard on the video camera (or still) has weak low frequency response and misses the "beefiness" completely. Should we call these mikes "vegetarians"?

I look forward to seeing and hearing the Black 5.

David

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Carnforth

Discussion Starter · #5 · May 24, 2008

Mornin' All
Here should be a couple of clips of the now complete aforementioned Black5, 45107, shunting a few Stanier brake vans around.
It's a detailed Hornby loco body, combined dome/top feed variant on a kit built chassis and kit built tender. I've used Howes chip in this and reckon the rod-clank and loose coupled wagon clash to be particularly effective.
I fitted 2x 23mm speakers in the tender, wired parallel and in phase and this has allowed a reduction in volume to a value of 30 and it's still plenty loud enough. The long crow of the hooter is allocated to F2 and Howes instructions say press once for on / once for off, using Dynamis, setting F2 to trigger means it blows whilst the button is pressed and I've had a lot of fun mixing this with the short pop, F3, allowing a bit of individual drivership. CV 57 needed a bit of tweaking to achieve 4 beats per cycle, I guess this chip is aimed at Hornbys RTR loco with a different motor/reduction to my chosen Mashima 16/24 mated to Comets' 50/1 'box.
Next project, 44709, again a Hornby loco body, Ivatt boilered variant this time, with Comets' LWB chassis and welded tender, this time with a single base-reflex speaker in the tender to allow a comparison to be made.
Steve

http://www.youtube.com/watch?v=7m3NgyGqDGU...feature=related

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dwb

· #6 · May 24, 2008

QUOTE I look forward to seeing and hearing the Black 5.

I have not been disappointed - that's great stuff

very atmospheric. When the '5' started on its first run to the far end of the track the chuff speed made me wonder if it was going to run into the end wall

David

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80class

· #7 · Jun 2, 2008

I bought the LMS chip from SWD last December at Warley and think it is the best steam project I've heard, I can strongly recommend it!

Rob

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