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Chip Amps Amplifiers based on integrated circuits

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Old 5th January 2012, 03:30 AM   #11
GloBug is offline GloBug  Canada
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Your going all out!
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Old 8th January 2012, 01:57 PM   #12
bcmbob is offline bcmbob  United States
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Default The USS Battleship MyRef in drydock.

This is a very long post that might better belong in the photo gallery, but is placed here due to the specific “integrated” nature of the project. You know – kind of like the Big Bang Theory. Good things follow.

Int1.jpg
Chassis fabricated from 3”X3” X1/4 aluminum angle, ˝”X3/8” “C” channel and thin aluminum floor.

Int2.jpg
Open channel provides convenient path for mains in wires. Rubber grommets used for extra protection.

Int3.jpg
Back plate drilled for RCA in, out posts, AC inlet and fuse holder. Front panel with on/off switch and Lightspeed contro

Int5.jpg
Reverse view

Int4.jpg
Under side construction. Plates drilled and tapped for 6-32 screws.

Int6.jpg
This is the transformer can upside down to show location relative to components. Shows there is not a lot of room for suggested soft-start, relays and fuses. Bottom to top – Lighter Note, JC-2 and MyRef x 2.

Int7.jpg
Can installed to allow space for LN controls. Terminal block allows removal of transformer can.

Int8.jpg Int9.jpg Int10.jpg
2 X MyRef V1.3 and Lighter Note mounted.
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Old 8th January 2012, 02:19 PM   #13
bcmbob is offline bcmbob  United States
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Int13.jpg Int14.jpg Int15.jpg
Vampire posts (long version as they were originally intended for DIY speakers) and Parts Express RCAs – all gold plated

Int16.jpg
Temporary wires to show short lead lengths. I have two sizes of Neotech solid core wire for final assembly.


Plan II – add the JC-2 preamp to obtain additional gain. I had it 90% completed and messed up.
J3.jpg

J4.jpg
New board for second attempt. Heat sinks in place for height calculations

J5.jpg J6.jpg J7.jpg
Bracket fabricated to allow proper air flow for JC-2 heat sinks.

J8.jpg
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Old 8th January 2012, 02:23 PM   #14
bcmbob is offline bcmbob  United States
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J9.jpg

J10.jpg




So there it is. I call it a battle ship because at this point, it weighs in at just over 25 pounds. If more room is needed for all of Andrew’s safety devices, front to back distance can easily be increased by the use of longer L/R “C” channels and chassis floor.

I’ve also considered replacing the Lighter Note with the Lightspeed to gain some room but want to check with Uriah first.

I should add the reason for the transformer can is my intention to build a twin chassis containing an ITX motherboard and DIY DAC to feed this integrated box with uncompressed audio files. Computers are infamously noisy – thus as much shielding as is practical.

New PC.jpg

All questions, comments and suggestions are welcomed.
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Old 8th January 2012, 03:28 PM   #15
GloBug is offline GloBug  Canada
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Very cool. Keep at it.
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Old 8th January 2012, 04:31 PM   #16
udailey is offline udailey  United States
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Shoot. Lost my post. Anyway,
Want more room? Turn it on its side. Use angle iron or some other 90 degree bracket. If its not tall enough then turn the 90 degree closer to 60degree.
LN can adjust Rtot giving best sound in that system. LS can not. LS with its board plus its power supply board is about half the size of a LN board so I can see the appeal but you can squeeze a lot of room by turning the LN on its side.
Uriah
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Old 8th January 2012, 05:04 PM   #17
bcmbob is offline bcmbob  United States
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Thanks Uriah. I'll pull out some of the AL stock and try a few things.
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Old 8th January 2012, 08:06 PM   #18
wrankin is offline wrankin  United States
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Shhhaaaaa-wwweeeeeetttt!

Thanks for all the pics - it gives me some really good ideas. I just finished two MyRef boards (with two more potentially waiting in the wings) and I am contemplating where I want to go with this and how I want to package it up - current thinking is active three-way crossover, possibly DSP. Not sure if I want to integrate it into a single chassis or spread it out. There are definitely some advantages to the one-stop-shopping method (as you have shown).

-bill
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Old 9th January 2012, 04:58 PM   #19
squalor is offline squalor  United States
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That's a great looking amp ! Are you a machinist ?
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Old 9th January 2012, 06:40 PM   #20
bcmbob is offline bcmbob  United States
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Yes, I was paid as a machinist for several years though my boss often expressed doubts that the title fit.

Nowadays I don't often have full access to a complete shop but find it seldom necessary as long as I stick to aluminum and high grade carbide tipped tools. I usually find careful and accurate lay-out as important, if not more than the equipment used to make the cuts. Other than the inset in the front panel, the chassis is being built with a drill press, table saw, small band saw, power sanders and of course - the indispensable "Dremel Tool".

I keep telling myself - Rodin and da Vinci never had an eight axis CNC.

Thinker.jpgarm.jpg
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