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 Post subject: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 8:47 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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
Tapping.jpg [ 225.73 KiB | Viewed 3251 times ]
IMG_4378.jpg
IMG_4378.jpg [ 275.23 KiB | Viewed 3257 times ]
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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 9:06 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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
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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
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Back1.jpg
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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 9:23 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
Another transformer PS build...as usual, got the transformer from local factory on my way to work...


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PlitronFactory.jpg
PlitronFactory.jpg [ 210.7 KiB | Viewed 3234 times ]
front.jpg
front.jpg [ 256.25 KiB | Viewed 3234 times ]
Inside.jpg
Inside.jpg [ 259.65 KiB | Viewed 3234 times ]
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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 11:52 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
Another stereo build using 2109 (220mm(W), 90mm(H), 257mm(D)) chassis


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temp_bottom.jpg
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temp_sink.jpg
temp_sink.jpg [ 39.76 KiB | Viewed 3195 times ]
2409_inside.JPG
2409_inside.JPG [ 345.46 KiB | Viewed 3195 times ]
2409.JPG
2409.JPG [ 347.41 KiB | Viewed 3195 times ]
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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 12:21 pm 
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Joined: Sat Feb 23, 2013 10:41 am
Posts: 7872
Location: Burlington, ON, CA
Very nice work Mr. Wang. Very nice.

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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 12:53 pm 
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Joined: Thu May 09, 2013 7:43 am
Posts: 168
Location: Markham, ON, CA
WOW nice work! Looks super professional. Just wondering what it costs to build these amps with case? Also what are the specs?


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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 1:09 pm 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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.


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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 1:10 pm 
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Joined: Sun Jan 30, 2005 10:30 am
Posts: 25
Location: Belleville, ON, CA
As you can see by my post count I am rarely moved to comment but, holy cow - very nice work!


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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 3:21 pm 
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Posts: 294
Location: Toronto, ON, CA
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;-)


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 Post subject: Re: Pass ACA Builds
PostPosted: Tue Sep 08, 2015 5:25 pm 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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...


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Transformers.jpg
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 Post subject: Re: Pass ACA Builds
PostPosted: Wed Sep 09, 2015 9:13 am 
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Joined: Fri Oct 16, 2009 7:42 am
Posts: 1408
Location: Toronto, ON, CA
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.

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 Post subject: Re: Pass ACA Builds
PostPosted: Wed Sep 09, 2015 9:23 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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;-)


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SumR.jpg
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 Post subject: Re: Pass ACA Builds
PostPosted: Wed Sep 09, 2015 12:54 pm 
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Joined: Thu Jan 01, 2015 3:40 pm
Posts: 319
Location: bowmanville, ON, CA
Those look great. Where do you get the kit? Or plans for the kit?


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 Post subject: Re: Pass ACA Builds
PostPosted: Thu Sep 10, 2015 7:11 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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


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 Post subject: Re: Pass ACA Builds
PostPosted: Sat Sep 12, 2015 6:26 pm 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 294
Location: Toronto, ON, CA
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 2905 times ]
02_pot.JPG
02_pot.JPG [ 138.4 KiB | Viewed 2905 times ]
03_ZTX450.JPG
03_ZTX450.JPG [ 132.19 KiB | Viewed 2905 times ]
04_2SK170_measure.JPG
04_2SK170_measure.JPG [ 148.42 KiB | Viewed 2905 times ]
05_2SK170.JPG
05_2SK170.JPG [ 149.25 KiB | Viewed 2905 times ]
06_Big_resistors.JPG
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07_10uf_caps.JPG
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08_1000uf_caps.JPG
08_1000uf_caps.JPG [ 136.6 KiB | Viewed 2905 times ]
09_3300uf_caps.JPG
09_3300uf_caps.JPG [ 150.62 KiB | Viewed 2905 times ]
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