Again thanks for the quick response. I'll pull off the tender shell because even though the Soundtraxx site says the decoder will slide through the opening (step 14 on the Athearn Mikado Digital Decoder Installation notes) I have my doubts. It's not a big deal because I have to pull the shell to install the speaker anyway.
My wife ordered the decoder from Loy and he included the appropriate speaker part number LS-O 1" Oval speaker 8 ohm, 1 watt 200-20K Hz. He also included a sheet of thin lead along with instructions on how to make an enclosure. Loy says... "There's no need to drill holes in the shell to let the sound out. The sound will not only get out without the holes, it is usually amplified and made better by the shell."
The instructions are fairly comprehensive regarding enclosure construction. I can fax you a copy if you would like. I suppose I can always drill holes after the fact if it turns out that I need them to let the sound out.
I think my primary points of concern are:
1.The disconnect between what the web site shows on decoder installation and what the decoder instructions show as far as what wires are connected to what and
2. Whether the decoder minus the wiring harness will simply plug into the Athearn DCC plug.
One end of the decoder has 2 purple wires, a white wire and an black wire conntected to a red wire with a capacitor in between them.
The other end (the wiring harness end) has green, red,orange,blue,white,yellow,gray,black and brown wires. The instructions that came with the decoder don't say anything about removing the wiring harness and they show a tan wire going to an optional cam. (I didn't get the cam since the regualr chuff is close enough for me). I don't have a tan wire and it doesn't say anything about where the white wire goes on the this end. ( The white wire on the harness end is shown connected to the headlight.)
You mentioned your Mike has a 9 pin JST plug - I'm assuming mine does as well unless Athearn put out more than one style. I got mine right after they first came out.
The web site indicates I should purchase 8 pin connectors and wire them to the harness. Is that really necessary or again will the decoder simply plug into the Athearn DCC plug? The web site I'm looking at incidentally is:http://www.soundtraxx.com/documents/manuals/quickstart.pdf
Thanks again for your patience and help.