I have just finished another Bachmann K-27 battery R/C + Phoenix P5 sound install.
This was done slightly differently again.
I fabricated a small sheet of 1.5 mm thick styrene to mount the ON-OFF switch, Charge Jack, Phoenix volume control and programming jack.
Here are the dimensions I used:
(http://www.rcs-rc.com/pics/Bachmann-K27v4/Mounting-plate.jpg)
The plate is mounted under the front lip below the front of the coal load and avoids drilling any holes in the tender shell or chassis.
(http://www.rcs-rc.com/pics/Bachmann-K27v4/Mounting-plate-02.jpg)
I used the RCS BIK-U3+VC which has a built in volume control switch. However, you could use any sort of switch you wished.
I'm impressed...and totally new to sound.
Where's the speaker?
Gerry
Thanks Gerry.
The above is an update of this way of doing it.
http://www.largescalecentral.com/LSCForums/viewtopic.php?id=8976 (http://www.largescalecentral.com/LSCForums/viewtopic.php?id=8976)
I no longer use those 1/2 - 1 watt speakers since the Phoenix is capable of 2 watts output and killed one.