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Old 27th June 2006, 10:57 PM   #41
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To set SW2 input selection see following pictures.
MC selection
SW2 1OFF
SW2 2 OFF
SW2 3 ON
SW2 4 ON

MM selection
SW2 1 ON
SW2 2 ON
SW2 3 OFF
SW2 4 OFF

Photo of SW2 presets for MM selection
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Old 27th June 2006, 10:59 PM   #42
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SW2 presets for MC selection.
Be carefull of the polarities with + and -
they are not all in the same direction.
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Old 27th June 2006, 11:08 PM   #43
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SW1 is used to set the load.
The easiest is to use 1 switch.
SW1 1 R6 1000R
SW1 2 R7 825R
SW1 3 R8 475R
SW1 4 R9 249R
SW1 5 R10 100R
SW1 6 R11 47R5
SW1 7 R12 24R9
SW1 8 R13 10R

You can of course use multiple resistors to parallel them and get values in between.
I wont make a chart of this.
You can see the Aleph Ono user manual.
Calculate yourself or use a multimeter.
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Old 28th June 2006, 04:42 AM   #44
Electrons are yellow and more is better!
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Quote:
Originally posted by promitheus
the meshed ground plane has a few advantages over solid plane.

1. lower stray capacitance
2. pcb remains flat
1 A groundplane should always be massive and make a good ground. Are you really sure about that, lower capacitance?

2 That may be true but I haven't got any problems with massive groundplanes and machine soldering.
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Old 28th June 2006, 06:01 AM   #45
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Quote:
Originally posted by promitheus
the meshed ground plane has a few advantages over solid plane.

1. lower stray capacitance
2. pcb remains flat


1. Ignorable
2. It does anyways
3. High inductance/impedance
4. Compromized (frequency limited) shielding capabilities
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Old 28th June 2006, 07:25 AM   #46
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One reason I used it was that the Pearl had the same type of ground plane.
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Old 28th June 2006, 07:29 AM   #47
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I figured that
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Old 28th June 2006, 09:11 AM   #48
Electrons are yellow and more is better!
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If I'm not mistaken Nelson had this because the pcb manufacturer wanted to save copper.
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Old 28th June 2006, 09:28 AM   #49
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Save copper? How do you mean?
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Old 28th June 2006, 09:37 AM   #50
Electrons are yellow and more is better!
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Solid groundplane, more copper.
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