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Pass ACA Builds
http://www.canuckaudiomart.com/forum/viewtopic.php?f=21&t=39648
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Author:  Frank Wang [ Tue Sep 08, 2015 8:47 am ]
Post subject:  Pass ACA Builds

Have done some ACA builds for friends, nice little class A amp. Thanks to Mr. Pass

-- 08 Sep 2015 16:55 --

Metal work on front panel

Attachments:
File comment: Power switch installed (ALPS push button switch)
IMG_4177.jpg
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File comment: Metal works on front panel done
FrontPanel.jpg
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File comment: Cut front panel hole, and tapping
Tapping.jpg
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IMG_4378.jpg
IMG_4378.jpg [ 275.23 KiB | Viewed 3735 times ]

Author:  Frank Wang [ Tue Sep 08, 2015 9:06 am ]
Post subject:  Re: Pass ACA Builds

Bias adjustment and finished the mono blocks

-- 08 Sep 2015 17:14 --

Transformer version...picked up the transformer from our local factory

Metal work on back panel...

Attachments:
transformer.jpg
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predrillholes.jpg
predrillholes.jpg [ 181.33 KiB | Viewed 3718 times ]
predrillholes2.jpg
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predrillholes3.jpg
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backview.jpg
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Overview.jpg
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TransformerCovered.jpg
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IMG_4190.JPG
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Label.jpg
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Top.jpg
Top.jpg [ 166.54 KiB | Viewed 3722 times ]
Back1.jpg
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Author:  Frank Wang [ Tue Sep 08, 2015 9:23 am ]
Post subject:  Re: Pass ACA Builds

Another transformer PS build...as usual, got the transformer from local factory on my way to work...

Attachments:
PlitronFactory.jpg
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front.jpg
front.jpg [ 256.25 KiB | Viewed 3712 times ]
Inside.jpg
Inside.jpg [ 259.65 KiB | Viewed 3712 times ]

Author:  Frank Wang [ Tue Sep 08, 2015 11:52 am ]
Post subject:  Re: Pass ACA Builds

Another stereo build using 2109 (220mm(W), 90mm(H), 257mm(D)) chassis

Attachments:
temp_bottom.jpg
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temp_sink.jpg
temp_sink.jpg [ 39.76 KiB | Viewed 3673 times ]
2409_inside.JPG
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2409.JPG
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Author:  Che Cavolo [ Tue Sep 08, 2015 12:21 pm ]
Post subject:  Re: Pass ACA Builds

Very nice work Mr. Wang. Very nice.

Author:  AudioBug [ Tue Sep 08, 2015 12:53 pm ]
Post subject:  Re: Pass ACA Builds

WOW nice work! Looks super professional. Just wondering what it costs to build these amps with case? Also what are the specs?

Author:  Frank Wang [ Tue Sep 08, 2015 1:09 pm ]
Post subject:  Re: Pass ACA Builds

AudioBug wrote:
WOW nice work! Looks super professional. Just wondering what it costs to build these amps with case? Also what are the specs?


Thanks. For specs, check Nelson Pass's article:
http://www.diyaudio.com/forums/diyaudio ... p-1-a.html

The cost varies depends on the enclosure, and power supply... Chassis is always a headache for DIYers.

Author:  Eddieh77 [ Tue Sep 08, 2015 1:10 pm ]
Post subject:  Re: Pass ACA Builds

As you can see by my post count I am rarely moved to comment but, holy cow - very nice work!

Author:  Frank Wang [ Tue Sep 08, 2015 3:21 pm ]
Post subject:  Re: Pass ACA Builds

Eddieh77 wrote:
As you can see by my post count I am rarely moved to comment but, holy cow - very nice work!

Thanks. I just have a drill press, and all I did was drilling holes. A lot of people can do better than that;-)

Author:  Frank Wang [ Tue Sep 08, 2015 5:25 pm ]
Post subject:  Re: Pass ACA Builds

Also tried using Amplimo transformer (Plitron has minimum 250CAD online order restriction) bought from Holland...cheaper and sound-wise also good.

From Plitron website, you can also find Amplimo plate amplifier...they got to have some connections...

Attachments:
Transformers.jpg
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Author:  dazed2 [ Wed Sep 09, 2015 9:13 am ]
Post subject:  Re: Pass ACA Builds

Nice builds!
How did you do the engraving on the front plates?

BTW you may also want to try getting your transformers from SumR transformers. They are also local (so no shipping costs) and will build custom with no minimum.
I've used them many times, Richard is a great guy.

Author:  Frank Wang [ Wed Sep 09, 2015 9:23 am ]
Post subject:  Re: Pass ACA Builds

dazed2 wrote:
Nice builds!
How did you do the engraving on the front plates?

BTW you may also want to try getting your transformers from SumR transformers. They are also local (so no shipping costs) and will build custom with no minimum.
I've used them many times, Richard is a great guy.


Just metal sticker...

Thanks, I have came across Sum R transformer...Plitron is on my way to work;-)

Attachments:
SumR.jpg
SumR.jpg [ 183.82 KiB | Viewed 3484 times ]

Author:  BKSRT8 [ Wed Sep 09, 2015 12:54 pm ]
Post subject:  Re: Pass ACA Builds

Those look great. Where do you get the kit? Or plans for the kit?

Author:  Frank Wang [ Thu Sep 10, 2015 7:11 am ]
Post subject:  Re: Pass ACA Builds

BKSRT8 wrote:
Those look great. Where do you get the kit? Or plans for the kit?


I collected the parts from various sources, e.g. digikey, Newark, mouser, Parts ConneXion, takefiveaudio...and etc

Author:  Frank Wang [ Sat Sep 12, 2015 6:26 pm ]
Post subject:  Re: Pass ACA Builds

Soldering an ACA tonight for an European friend, write down something hope could help your build...

Tips:
-If you are using a chassis without pre-drilling/tapping holes, use the blank PCB to position the drilling holes before soldering...;
-If you are not sure about the components, measure the components before plug them into PCB;
-Use a blade or sand paper "clean up" components' legs and wipe clean before put them into PCB...this will facilitate soldering and help forming a strong binding. Even new components, you know, sweat, grease, dirt and etc during handling;
-Follow from lowest to highest sequence, well, you don't have to, but this could help achieve a better looking result;
-Lift low watts resistors a bit above PCB to facilitate air flow, just a bit...for other DIY projects' PCB, this might not apply, depends ...
-Lift high watts resistors above PCB, e.g. 0.47R/3W, 0.68R/3W, they are hot...

-- 13 Sep 2015 02:28 --

You don't have to follow the sequence ... I put ZTX450 and SK170 lower than 10uf caps, therefore I solder them before 10uf caps

Attachments:
01_resistors.JPG
01_resistors.JPG [ 121.81 KiB | Viewed 3383 times ]
02_pot.JPG
02_pot.JPG [ 138.4 KiB | Viewed 3383 times ]
03_ZTX450.JPG
03_ZTX450.JPG [ 132.19 KiB | Viewed 3383 times ]
04_2SK170_measure.JPG
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05_2SK170.JPG
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06_Big_resistors.JPG
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07_10uf_caps.JPG
07_10uf_caps.JPG [ 144.89 KiB | Viewed 3383 times ]
08_1000uf_caps.JPG
08_1000uf_caps.JPG [ 136.6 KiB | Viewed 3383 times ]
09_3300uf_caps.JPG
09_3300uf_caps.JPG [ 150.62 KiB | Viewed 3383 times ]

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