Amp 5-way switcher

[Paul Lebow]

I noticed there was some interest in switching between multiple amps. I've built a relay-activated 5-way switcher that can switch between amps via a common input jack either while playing through the selected amp's speaker, or it can direct the speaker output of the selected amp to a common speaker or load box. The amp circuits are completely isolated from each other and the each amp's speaker output is protected with 8 ohm resistive loads when not selected. There is also a 470 ohm safety resistor across each output to prevent any kick back arcing in the output transformer during the millisecond switching time. Probably about $30 worth of parts - 12 jacks,15 mini 10 amp relays, 6 8 ohm 25 W resistors, heat sink. It works like a charm.

Paul

[R.G.]

So were you going to provide the schematics to this?

[Paul Lebow]

Didn't see any responses. See attached schematic.