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Old 16th August 2003, 05:40 PM   #1
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Talking Your pics of a finished AV800

Hey guys...

I just in the finishing stages of my AV800's and was wondering if any of you have photos of your finished product.

You know, boards, cases, supplies etc...

I would love to see what you have done. I will post min when i am finished.
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Old 16th August 2003, 11:41 PM   #2
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Join Date: Feb 2001
Location: Mars
I have not completed mine yet, but I did
complete the pcb layout with some
extra goodies.
http://home.pacbell.net/lordpk/ampli...all-layers.jpg

When you are done, can you post
some feedback on the sonics of this
amplifier and any improvements you
might think it needs.

I'm too busy working on the speaker
project and put the amplifier project
on hold.



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Old 17th August 2003, 12:14 AM   #3
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very nice design!

Would it be possible for you to publish you pcb files?
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Old 17th August 2003, 12:18 AM   #4
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Exclamation Wow...

Is that 14 pairs I count?
What voltage is your supply?

What software package are you using, this layout is sweet!
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Old 17th August 2003, 02:52 AM   #5
Diode is offline Diode  United States
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Kick-*** layout man!!!!
I've seen some of the best and that deffinately is in the best category! Very well planned!

Chris
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Old 17th August 2003, 04:26 AM   #6
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Join Date: Feb 2001
Location: Mars
If you send me an email, I can send
you the gerbers and document.
The document is about 99% complete
which includes information from Holton's
AV800 document and includes the protection circuits I added.

The problem is... My document is almost
10 megs in Microsoft Word format,
so you need a Word reader minimum
and your email needs to support a
10 meg file for me to send. /heh/

The document I have doesn't include
the parts list for the protection circuits,
I've been kinda busy with other stuff...
but all the schematics are there.

Warning - Even though Anthony Holton
claims his AV800 - 1KW amplifier works,
I have not actually verified it. I took
the leap of faith that it works and
created the layout for 14 transistors
per rail. (Holton 1KW was tested with
10).

I was hoping to wait for others to build
their own AV800 so I can get feedback,
perhaps to improve the design. To fabricate 4 layer pcb's I need to spend
between $1500 - $2000 for the initial
order, so I'd rather wait to make sure
a prototype works well and sounds good.

Holton said the AV800-1KW works
with +110v rails, but actually it
was +96v when loaded.

1600w @ 2 ohms short term.

I think with the extra transistors,
slight lowering of rails, maybe 90v,
and massive heatsink, it should
drive 2 ohms, maybe even 1 ohm
music (not continous tones).

I use this software.
http://www.mentor.com/pads/powerpcb/

There was AV800 discussion here.
The Av800, how good is it?

my email
lordpk@pacbell.net

... and just for giggles, I stretched the model 2800 PCB and made it longer, added more transistors and more capacitors... 40 transistors on the
board (one channel), I call it model
4000. I don't really plan to make this
... yet .. and I have no idea if the buffer
stage can drive 20 transistors...

My speaker project has been consuming
me for the past few years, most of
my effort is spent there. This amplifier
project was suppose to be next years
project for me... But I found some time
to get some of it done, but not all.
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Old 17th August 2003, 11:57 AM   #7
Kermit is offline Kermit  Norway
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Quote:
Originally posted by thylantyr
The problem is... My document is almost
10 megs in Microsoft Word format,
so you need a Word reader minimum
and your email needs to support a
10 meg file for me to send. /heh/
If you use a compression sw like winzip (http://www.winzip.com/ddchomea.htm) I bet you could reduse the size to 1/10 or somthing. Would make it easyer to email.
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Old 26th February 2004, 05:35 AM   #8
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Location: US
thylantyr,

I'm glad you documented Anthony's work, and I like your design. I know of a site called barebonespcb.com that will accept your gerber files with no minimum order. olimex.com as well.
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Old 26th February 2004, 09:21 AM   #9
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Location: Cambridge
Quote:
Originally posted by thylantyr

I was hoping to wait for others to build
their own AV800 so I can get feedback,
perhaps to improve the design. To fabricate 4 layer pcb's I need to spend
between $1500 - $2000 for the initial
order, so I'd rather wait to make sure
a prototype works well and sounds good.
Hi, I'm not sure if this will be useful for you (your PCB may be too large to take advantage of this offer), but there is a company here in the UK which will make a four layer PCB up to 315 x 240mm in size for only 220 GBP (about $410, not including VAT and delivery) which may be a lot cheeper for you to do if you only want one or two baords made.

You can find their website here (click on the prototype section to see what prices they offer on various PCB sizes), which may not look like much, but I have used them before and their service was great.
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Old 26th February 2004, 04:15 PM   #10
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Join Date: Feb 2001
Location: Mars
I haven't done any work on this project other than the initial
pcb layout. I'm working on other things first.

But I noticed that Holton is back into the audio thing,
his website says.

24th Feb 2004
I will be featuring the progressive constuction of a Mono 1kw
Amplifier into a wind tunnel chassis and a 1600 watt amplifier in a
stereo wind tunnel version. You will see the first photos in few days.


Sounds like a fun project.

http://www.aussieamplifiers.com/
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