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Old 21st March 2011, 08:44 PM   #581
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by regiregi22 View Post
Is that toroid from Toroidy.pl?
yes indeed, very nice , the amp absolutely dead silent.
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Old 21st March 2011, 08:45 PM   #582
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by Nelson Pass View Post
Ooooooooooh.......

Clean wiring.

...OOOOOh praise from the master...i'm overcome

THANK YOU Nelson for this great amp.
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Old 21st March 2011, 09:12 PM   #583
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The Pass A75 and system I built 15 years ago. Preamp is also an actie x-over. Biamp setup with the A75 driving the sats and the Carver driving the subs. Outboard DAC using BurrBrown chips...forgot which ones.
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Old 21st March 2011, 09:46 PM   #584
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Quote:
Originally Posted by CeeVee View Post
yes indeed, very nice , the amp absolutely dead silent.
Just received two of them a pair of days ago They have an extra wire for the inside shield. They're potted. 500VA 2x25vac
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Old 21st March 2011, 09:54 PM   #585
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by Andersonix View Post
I wasn't going to ask, but since NP said it was "clean wiring," wouldn't it have been even better if the transformer had been up front (mag field farther from inputs and pcb) and cap bank at the rear (closer to star ground point, pcb, and load)?

There is a reason for Nelson to make his PCBs long and thin...input is at one end, which makes it easier to layout the power wiring to avoid corrupting the input with noise from AC power.

In this case the input is always in the middle, with trafo at back or front, the rectifiers are in my perspective in the right place for this layout option.

If the trafo was at the back i would have to run 240VAC all the way to the back and wiring would be more messy and difficult.

Anyway, there are no absolutely right options, engineering is the art of compromise...someone said.

The amp is absolutely quiet as is, i hear nothing at all with my ear on the tweeter...so I'm happy.

I would have opted for NP type boards before building, theory dictates it, but practice shows that this solutions works well.
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Old 21st March 2011, 10:20 PM   #586
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by CeeVee View Post
.......
If the trafo was at the back i would have to run 240VAC all the way to the back and wiring would be more messy and difficult........
for mains AC there is always solution - either routing it under technical bottom of amp ( perforated one on pics ) or shielded ( as on pics with black bottom )

note that Papa is not loosing sleep about that ....... so that must be illustration of importance ( remember Migty ZM's interpretation of Papa's details - "... good enough " )

I agree that other power routes are of more importance ....

Click the image to open in full size.

this pic deliberately posted

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and then - shielded mains cable

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this one - not shielded mains cable , but routed under technical bottom

Click the image to open in full size.

that black central thingie is just route from static shields to sole safety gnd point on chassis

Click the image to open in full size.

Flew Over the Cuckoo's Nest :

Click the image to open in full size.

funny one

Click the image to open in full size.
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Old 21st March 2011, 10:24 PM   #587
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Old 21st March 2011, 10:28 PM   #588
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tnx

I know
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Old 21st March 2011, 10:36 PM   #589
CeeVee is offline CeeVee  Portugal
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Poiting the way for my next build Mighty ZM ?

Each new amp is new adventure and a learning experience.

I'll try to make my next one better than the last...always.

Edit: I particularly like the "routing" of picture 2....

Last edited by CeeVee; 21st March 2011 at 10:43 PM.
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Old 21st March 2011, 10:39 PM   #590
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Quote:
Originally Posted by CeeVee View Post
Poiting the way for my next build Mighty ZM ?

......
naah ..... I'm just posting pictures

Quote:
Originally Posted by CeeVee View Post
......
Each new amp is new adventure and a learning experience.

I'll try to make my next one better than the last...always.
amps are not important ;

building is .......
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