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Old 24th July 2003, 03:12 PM   #11
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Quote:
Originally posted by Bricolo
now I'm wondering how I'm going to place all my gainclone's components in it

should I place the toroid in the center, ant then each channel at one side?

or place the toroid in an edge or a side?

Placing it in the center leads to a very balanced amplifier weight wise. But unless you plan on moving it a lot...this isn't all that critical. Lots of amplifiers do this, but they usually have heatsinks for each channel on either side of the amp. So this layout makes sense for them.

However, I would place it on one side, bringing the AC into the chassis on that same side. Signal in would come in on the far opposite side, to minimize noise. Loudspeaker out would come out of the chassis nearer the signal in than the AC in. This keeps your AC as far away as possible. In fact I have seen, and have made designs where an aluminum/steel divider is placed between the transformer/rectifiers and bulk capacitance and the signal portions of the design. This creates a Faraday cage around the noisy parts.

Toroids can and do leak EM noise, especially around the input/output wiring.

Scott
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Old 24th July 2003, 03:15 PM   #12
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Very nicely done and there is not much to improve here. If the top panel is too tight, you might try to trim it a bit, with belt sander (if available).

This chassis style is very similar to what PassLabs use, the only exception is that top panel is placed over the rear panel and this helps to open the cover (and provides some extra rigidity)
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Old 24th July 2003, 03:20 PM   #13
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I would place the transformer on the far back (either left or right depending on where your power line comes in).
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Old 24th July 2003, 03:25 PM   #14
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Quote:
Originally posted by Rarkov
As I have just written on another thread...
Absolutley stunning! People are actually catching up with PD's standards! (I'm just trying to nudge him into doing something outstanding! )

Keep up the great work and pictures. The name for the drill you were using is called a Pillar Drill.

Gaz
Thanks, Gaz


Teach me some english, please Online translators don't work for those technical words

what's the name for all those tools?
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Old 24th July 2003, 03:26 PM   #15
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Quote:
Originally posted by millwood
I would place the transformer on the far back (either left or right depending on where your power line comes in).

You are not saying that because of my suggestion to place it in a center?

My reasoning to put it centrally is following. This is quite a big chassis by GC standards. If this is stereo amp, you should definitely use dual mono layout, with ea channel on either side and probably using side panels for heatsinking. This leaves the center space empty and it's a perfect place to mount transformer, or maybe even two. Also AC input should be placed centrally and both RCA jacks and binding posts separate on both ends of rear panel. Placing transformer centrally makes for better balanced chassis as well, not to mention having the same resonances for both channels
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Old 24th July 2003, 03:29 PM   #16
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Quote:
Originally posted by Peter Daniel
Very nicely done and there is not much to improve here. If the top panel is too tight, you might try to trim it a bit, with belt sander (if available).

This chassis style is very similar to what PassLabs use, the only exception is that top panel is placed over the rear panel and this helps to open the cover (and provides some extra rigidity)

You're the man, Peter!
I didn't think about this solution. It's too late now, but I keep it in mind for the next time.

BTW, how is this pass chassis done for the bottom? The same as for the top? layong over the back plate?
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Old 24th July 2003, 03:31 PM   #17
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Quote:
Originally posted by Rarkov
The name for the drill you were using is called a Pillar Drill.
Here, we would call it a drill press.
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Old 24th July 2003, 03:33 PM   #18
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Here's the rear view. That's a very clever and efficient way to built a chassis (if you don't mind using 1/4" panels, of course)
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Old 24th July 2003, 03:35 PM   #19
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Well, I was hesitating between 2 "layouts", and 50% tell me to use the 1st, and the other 50% tell me to use the 2nd

Next time I'll throw 1€ and look if it falls on the top or on the bottom, instead of asking a question here
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Old 24th July 2003, 03:37 PM   #20
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Quote:
Originally posted by Peter Daniel
Here's the rear view. That's a very clever and efficient way to built a chassis (if you don't mind using 1/4" panels, of course)

Thanks!

Mine is built the same on the rear as on the front, the pass one is far better

is there any advantage in having an offseted rear pannel?
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