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Old 17th April 2010, 08:43 AM   #31
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it might work without complications and effect things that are not audible .... but yes its bad practice
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Last edited by east electronics; 17th April 2010 at 08:49 AM.
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Old 17th April 2010, 06:41 PM   #32
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How and where is the capacitance formed (and what is the effect)?
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Old 18th April 2010, 07:38 AM   #33
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two parralel metal plates are a capacitor the dielectric is air and all of these is also probably another capacitor if fit too close to the metal cover of your amplifier

that is why even in smaller size like a pcb proximity between traces is an issue but also impedance and sensitivity are diferent ther but principal is the same
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Old 18th April 2010, 11:29 PM   #34
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Alright, I'll play along: At an overlap area of 1cm^2 and separation distance 2mm (both extremely worst case) between the cathode of one diode to the amp case,
C=0.44pF

I guess I'm going to have to live with that? Really good thing I didn't make a heat sink for them using some Al sheet and mica insulators or I would have increased the C by a factor of ten, maybe a hundred with some very thin mica....

And to think some people actually mount a small cap (and R) between terminals in a bridge?
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Old 15th December 2011, 09:26 PM   #35
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I had big plans to make a new front panel using a latching Bulgin switch, but when I actually laid hands on the switch, it was too small to reliably operate with my medium fingers, so I reluctantly sent it back to Mouser and went with plan B as seen in next pic.

So anyone with an old Acurus with a switch with a flickering green neon can add instant old-school look with this $3 perfect fit direct replacement illuminated power switch:
540-YRM32F2BBRLN Cherry red illum switch
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File Type: jpg Acurus 100X3 New Face MAR2011.jpg (70.5 KB, 147 views)
File Type: jpg Acurus red switch.JPG (278.8 KB, 149 views)

Last edited by Andersonix; 15th December 2011 at 09:28 PM.
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Old 28th March 2012, 09:38 PM   #36
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Default CRC to CLC update

I replaced the 0.25 Ohm resistors in the CRC with 18AWG 1mH inductors that have ~0.2 Ohm DCR.

before:
V rails = +/- 51.8VDC
ripple (with amps connected) = 8-10mVAC (meter not steady)

after:
V rails = +/- 51.8VDC
ripple (with amps connected) = 3-6mVAC (meter not steady)

I didn't expect to hear much difference, so I was satisfied to immediately notice the amp sounding darker overall while the highs became cleaner and more detailed. But I also came to realize that there was also a nice improvement in the bass control and definition, making it easier to hear exactly where the woofers go 'wooly.'

This brute force approach to the PS is really working well in this amp, and I will use a CLC and aim for 100,000uF per channel in my designs from now on.
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