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Old 20th May 2008, 04:04 AM   #31
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Hi,

That wire will be fine, if you don't mind working with shield.

As I mentioned previously, I never found the need for shielded wire and what I'm normally using is 26ga gold plated solid core copper. I only put teflon sleeving where the wire might come in contact with other wires, or chassis parts.I got it from a friend and he didn't disclose his source (most likely in UK)

Other alternatives can ba CAT 5 wire or Cardas uninsulated silver wire and Vampire Cast Copper Wire (available from Percy).

Kimber 19ga TCSS is also good for signal as well as DH Labs Revelation Series 23ga Solid Core Silver hook-up wire available from Partsconnexion.
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Old 20th May 2008, 04:07 AM   #32
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The U channel is predrilled and components ready to install.
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Old 20th May 2008, 04:14 AM   #33
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I like to use DeWalt pilot point drill bits, starting with a small hole and then increasing the size. Because of pilots, the hole locations can be wey accurate.

The other two tools are used for deburring.
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Old 20th May 2008, 04:24 AM   #34
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I use 6-32 screws to mount the chips, which requires 7/64 tap drill. For tapping, I always use a cordless drill gun and presently, Tapmatic fluid. For more info on tapping see those posts: http://www.diyaudio.com/forums/showt...9413#post69413
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Old 20th May 2008, 09:20 AM   #35
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Quote:
As I mentioned previously, I never found the need for shielded wire and what I'm normally using is 26ga gold plated solid core copper. I only put teflon sleeving where the wire might come in contact with other wires, or chassis parts.I got it from a friend and he didn't disclose his source (most likely in UK)
Probably from here .
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Old 20th May 2008, 02:56 PM   #36
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Could be, thanks for the link.

The spool I pictured is 0.50MM GOLD PLATED COPPER WIRE SOFT 500GR, Ref: GP0500S-500
http://www.wires.co.uk/acatalog/cu_gp.html
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Old 20th May 2008, 04:51 PM   #37
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I mount RCAs and binding posts first, and what you see is Cardas hardware. I use the cheapest RCAs: http://www.cardas.com/content.php?ar...d=6&part_id=32
and to me they sound better than more expensive types.

As to binding posts, I prefer low mass ACBP S: http://www.cardas.com/content.php?ar...=11&part_id=83

When spade connectors are to be used, Patented Binding Posts are my first choice (CPBP CRS): http://www.cardas.com/content.php?ar...=10&part_id=53

Please note that isolation washers are used to separate connectors from a chassis. With RCAs, I don't use the ground tab; the wires are soldered directly to metal body.
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Old 20th May 2008, 07:00 PM   #38
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It's time to install amp boards now.

There are two types of LM3875 chips: isolated package (LM3875TF) and non isolated package (LM3875T). With the second one, isolation pad is required when mounting on grounded metal surface.

I use only isolated chips. Although pad is not required, one needs to apply heat transfer compound to improve heat dissipation from a chip to metal surface.

Don't use too much of that paste, only enough to fill the gaps. Also, the heatsink surface needs to be smooth and all burrs sanded out. I apply paste only to the chip, thighten pretty strongly; after half an hour realease the screw and this time tighten only moderately strong. Thick aluminum washer is used to improve contact.
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Old 20th May 2008, 07:04 PM   #39
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Please note that in this particular assembly, the boards will be mounted only by attaching the chips. Further stability is obtained by applying double sided adhesive pads, which will secure caps against chassis wall.
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Old 20th May 2008, 07:06 PM   #40
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and that how it's all done.
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