Is there a reliable way to tell if an SD75I is the new release with the "fast motor" versus the older release with the Faulhauber? It doesn't appear AZL bothered to change the part number , but I was hoping the packaging might be different or some other distinguishing feature without disassembling the loco. (e.g. trying to buy one off eBay)
While I understand the "advantages" of the Faulhauber version, I wouldn't normally be THAT concerned about having it, other than the fact that I have another one (a stripped CN SD75I, to be BNSF Grinstein Executive scheme) that I want to pair up with the BNSF Heritage-II SD75I version and would prefer they match. They'll have decoders, but I still would prefer they be at least in the same stratosphere spec-wise. They're going to be my coal-haulers primarily, so having the slower top end speed is fine...they will "pretend to be" SD70MAC's.
The only way to really tell is remove the shell. The pre 2014 releases will have a greenish PCP with an LED that hangs off of a long lead. The post 2014 releases use AZL's standard PCB which is black and has the LEDs mounted right on the board.
Since I have neither version, it obviously makes me an expert
But from the images I've seen Rob and your description, the two versions are using two entirely different types of LEDs. Can't you tell the difference by the color? the intensity? how they illuminate the cab and hood (or not)?
Thanks Rob and Mark. Mark, while you are probably right, that probably doesn't help much insofar as buying one off eBay is concerned. I mean, I suppose I could ask them to fire it up but unless they happened to have both, I'm not sure what criteria we would use to describe the color. I guess if intensity was dramatically different that might be a tell.
Other good idea would be just to ask them if they've had them longer than about 6 months.