Dear Sparky and other,
The EMS Jomar solid state switches have come up several times during the life of this thread. There were no such things available when I flew RC aircraft, or at least I was unfamiliar with them if they were. In other words I don't know what I don't know.
The audio system for the locomotve consists of two components. One is the sound card and the other is a standalone amplifier.
The volume on the sound card is controlled by a momentary toggle. When the toggle is held in one direction the volume goes up until the correct volume has been achieved. When the toggle direction is reversed the volume goes down. The volume on the amplifier use a standard audio control switch like you find on your car radio.
EMS Jomar offers a Opto-isolated E-switch. The EMS Jomar website includes the following description:
"Solid-state replacement for a servo and switch! Adjustable ON point, reversing switch, and LED indicator. Optically isolated for no radio noise problems. Use as ?old timer? ignition cut-off, GLO driver switch, Smoke pump control, On-board starter, etc., 1.5 x 1.5 x .75 - weight .5 ounce! Includes servo connector. Switch up to 24 volts, 20 amps!"
Do you think that this e-switch could control either of the above mentioned volume switches?
Regards,
Britt Harrington Miami, Florida