I'm thinking I might need a dummy load for amp repair, not just some speakers. For the main resistor, 8 ohm 100W could be good. And some sort of attenuator for the monitor speakers? What would be reasonable values for the resistors, 10 ohm?Perhaps bnc connectors for easy scope hookup. With small fast fuses in the ground wires in case of connection errors?Anything else I'm missing?
Speakers are reactive loads. A purely resistive load is good for the amplifier, but monitoring the output will sound like a resistive load. You've just drawn a monitor speaker in parallel to a resistor. Tube audio will sound worse with more resistive loads. Solid state won't care as long as you're above the minimum.
>>2952920The monitors would mostly just play the 1 khz test tone anyway, the sound quality isn't important. But I would like for it to be attenuated if I crank the volume
>>2952942If you don't care about the quality, just monitor on the scope. Separate your schematic down the middle. Have the dummy load stand alone and make a signal tracer out of the rotary so you can jump into partially operating equipment. Generally, with amps there are signal quality concerns. They can be hard to see on the scope and easy to hear or vise versa. It's nice to have some tools to point you in the right direction.
