09-22-2010, 06:23 AM
Hi Leonid
1. Your signal generator should have a control where you can regulate the strength or weakness of its output. I use an old Clough-Brengle signal generator, and on mine, it is labeled "Output Attenuator" and is actually two controls. Different generators may call this different names, but the effect is the same - it increases or reduces the output from the generator.
2. Output meters are connected across the speaker voice coil, or across both plates of push-pull audio output tubes, or across plate and B+ of a single-ended output tube. A digital meter does not work well in this application; you need an old analog meter for this. (Actually, I use an oscilloscope, but most people use a meter.) The meter is set to read AC volts on a low scale (0-10, 0-20 or somewhere in this range, depending on the meter). Some older analog multimeters have a position on its switch labeled "Output" and if so, this is what you want to use.
3. Yes, you will get the most accuracy from your alignment if the volume is set at maximum. This is where the attenuator on your signal generator comes in handy (see #1 above). Turn the attenuator on your generator down so you are hearing a very weak signal, just enough to be measurable while not blasting you out of the room.
I hope this helps and does not serve to confuse.
1. Your signal generator should have a control where you can regulate the strength or weakness of its output. I use an old Clough-Brengle signal generator, and on mine, it is labeled "Output Attenuator" and is actually two controls. Different generators may call this different names, but the effect is the same - it increases or reduces the output from the generator.
2. Output meters are connected across the speaker voice coil, or across both plates of push-pull audio output tubes, or across plate and B+ of a single-ended output tube. A digital meter does not work well in this application; you need an old analog meter for this. (Actually, I use an oscilloscope, but most people use a meter.) The meter is set to read AC volts on a low scale (0-10, 0-20 or somewhere in this range, depending on the meter). Some older analog multimeters have a position on its switch labeled "Output" and if so, this is what you want to use.
3. Yes, you will get the most accuracy from your alignment if the volume is set at maximum. This is where the attenuator on your signal generator comes in handy (see #1 above). Turn the attenuator on your generator down so you are hearing a very weak signal, just enough to be measurable while not blasting you out of the room.
I hope this helps and does not serve to confuse.
--
Ron Ramirez
Ferdinand IN
