Gareth 73 wrote: ↑Thu Sep 12, 2019 8:44 pm
I have to ask why do u want to change the motors?
The lima pancake motor that runs well on dc will work just as well with a hard wired dcc decoder sound or not. It's just the usual thing of keeping it clean. And fitting a stay alive capacitor really helps lima or any other make with dcc it's just that lima locos tend to have lots of room compared to modern locos inside.
Other option is some of the hornby railroad models are upgraded lima models that tend to be dcc ready or tts fitted anyway. So body swaps are sometimes easy.
Another point a tts chip with an upgraded speaker is a lot cheaper than say south west digital and is all u need in a lima model with say no lights etc tho easy to put in if so required.
To fit a lima 37 with a chip is a matter of 4 wires been soldered in place and isolating the motor bogie from it's pick ups. Probably took me less time than the soldering iron takes to warm up to fit a bog standard bachmann chip I doubt sound would be much harder depending where the speaker is to be placed.
I want to change the motors because the current drawn by pancake motors can exceed the current rating of chips.
My local model shop who have been undertaking sound chipping of locos for me advised me of this when I first discussed converting Lima locos with them.
I particularly wanted DMUs and AEC railcars converted as the forthcoming new models are expensive, although of better specification with lights etc. which I felt I could manage without.
They took in 4 DMus/railcars of mine to test for current drawn. They advised that only one of them drew a current low enough to be suitable for chipping, but to be safe we agreed first to fit a standard zimo chip rather than an expensive sound chip. The result was that the unit blew a chip when they were testing it after installation!
Yes, you are right that Hornby chassis can be substituted for some items and this has been done one some of mine already. However this depends on the availability and cost of the replacements which incurs costs because lima items with the wrong body for their boxes command a lot less than the Hornby rechassised items that need to be bought for rebodying.
I do hope that your class 37s do not suffer from Chip blow ups!!
Perhaps other readers can comment on their experiences in this direction?
Best regards
Paul