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Old 8th December 2010, 02:09 PM   #11
Bigun is online now Bigun  Canada
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Quote:
Originally Posted by HFGuy View Post

Well building this chassis killed me. I lost ALL interest in both finishing the amp and audio in general.
This hobby has done that to me too, on more than one occasion. I nearly fell at the first hurdle when I couldn't get the pcb making process working. Chasis work is a royal PITA. And I never made anything as neat as yours - really good work.

Tell us more !
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Old 8th December 2010, 02:12 PM   #12
rjbv17 is offline rjbv17  Portugal
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Default My first and (perhaps not) last DIY amp

I decided for an upgrade
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File Type: jpg HI-FI0001.JPG (308.3 KB, 543 views)
File Type: jpg HI-FI00020.JPG (233.3 KB, 511 views)
File Type: jpg HI-FI00014.JPG (175.6 KB, 509 views)
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Old 8th December 2010, 02:28 PM   #13
THD+N is offline THD+N  United States
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I think we all have been discouraged by something along the way when building a tube amp or some other project. We get impatient and want to see / hear the results and they cannot come fast enough sometimes.

I am into RC planes / helicopters and these things will try your patience too, but you have to pace yourself and remember to enjoy "the hobby".

Amp looks great. What about an underside shot and more pix in general?
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Old 8th December 2010, 05:46 PM   #14
rjbv17 is offline rjbv17  Portugal
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Being a bit more explicit, this was the amp before the upgrade.

I only kept the case and the OPT. I've started in 2006 and ended this year. Step by step, having the most of each one.
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File Type: jpg HI_FI0001.JPG (281.3 KB, 378 views)
File Type: jpg HI_FI0005.JPG (149.9 KB, 186 views)
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Old 8th December 2010, 06:08 PM   #15
HFGuy is offline HFGuy  Canada
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Thank you folks for the kind words. If this whole amp project goes well I actually plan to tackle a preamp, I think ill do the Frank's Ultimate Preamp, but this time I won't build the chassis. Anyways here are some more photos. Here are the raw materials for the chassis. I think I paid like $50-100 for all the aluminum bits.

Click the image to open in full size.

Here is how I matched the tops and bottoms together.

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Next is the amp covered in $1000 worth of painters tape.

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After this begun the drilling and sanding (to get a brushed aluminum finish) period of the amp's life. As you can imagine this was a dark period and thus no photos

These photos shows some more of the details, the sides and front are composed of 3/4" alum flats, the tops and bottom are 1/8" sheets and the back is a 1/2" U channel.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

In the imagines the lines of the alum don't line up perfectly, but they will when I am done. I need to tweak the sheets while I tighten the bolts so they all line up like they are suppose to. Before I broke them down to be anodized all the joints where razor edge perfect.

Here is some of the planning on part layout I did. Due to the large physical dimensions of the parts I used planning the layout was very tricky. So I used photo shop to do the planning. While It is far from perfect or near the quality of some of the jobs I have seen on this site it was the best I could come up with

Click the image to open in full size.

Here is what that looks like with real parts

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My local input stage ground

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And My "star" ground"

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Here are some early photos that didn't really fit anywhere else. Here are the caps used on the project.

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And all of the parts I somehow have to fit into the chassis' when done

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Well those are all the photos I took along the way. I had planned to take alot more but you know how it goes when you are working. If you folks wanna see anything in particular just tell me and ill snap a new photo for you.
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Old 8th December 2010, 06:43 PM   #16
rjbv17 is offline rjbv17  Portugal
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Pure art inside. Congratulations. It's a wonderful job. And must sound as it looks.
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Old 8th December 2010, 07:11 PM   #17
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Quote:
Originally Posted by chops View Post
My father is like that and can build shortwave radios, amplifiers, etc, etc without even looking at a schematic. He just starts building and in a few weeks he has a wonderfully working piece of equipment on his bench.
Your situation is the opposite of mine: my father is not handy AT ALL, and doesn't understand or appreciate my building passion. Enough with the father-son issues

I can't understand you put your project aside for that long! Most of us here will agree the chassis work is the worst part of building an amp, you did an absolutely amazing job!

Using photoshop to determine the layout, good idea, I always just started building and decided on the spot where what would go. Takes quite a few builds to gain some experience how not to get yourself in trouble.. Only recently I started using pencil & paper to plan a layout
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Old 8th December 2010, 07:49 PM   #18
6L6 is offline 6L6  United States
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Absolutely outstanding!!!

I wish I had the time to do a chassis like that... It looks wonderful.

We all hope that your project comes to it's conclusion - a pair of beautiful working amps that make it all seem worthwhile. (Which it is!) Stick to it - you are almost there... The payoff is soon!!
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Old 8th December 2010, 08:22 PM   #19
chrisb is offline chrisb  Canada
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your first tube audio amplifier maybe, but the meticulous layout and craftsmanship suggests you're no stranger to intricate projects

nice freeking work

and I dare say that once you get music out of it, it'll be far from your last

don't get started on loudspeakers
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Old 8th December 2010, 08:47 PM   #20
HFGuy is offline HFGuy  Canada
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This was my first DIY audio project (and basically my first real electronics DIY). It is a retardly overpower headphone amp, it can actually power small speakers.

Click the image to open in full size.


There are a few reasons I was able to just let the amp sit unfinished. #1 was my other hobby, RC helis, they are very time and effort intensive so I was distracted. #2 Was my day job is a Phd student in Electrical Engineering and sometimes working on the amp just seems like homework.
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