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Old 22nd July 2013, 10:09 PM   #1161
Variac is offline Variac  Costa Rica
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We've added just the parts kit- including the PSU's, back on the order page so people who don't want to pay for shipping the chassis to their country have an option. I believe that if you add up all the bits and pieces it is price competitive with small quantity orders of parts at Digi-Key or Mouser. And if not, certainly when you count the time to make up an order!


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Originally Posted by speedless View Post
Hi
Just to inform any one living in EU and having a hard time getting there bits and pieces.
Try DIGIKEY´s site.
Normally I would not advertice for anyone,but compare the product index,prices and shipment terms/price.
Just ordered the parts for the ACA and some for the PLH.
Waiting for that magic moment: "Your order has been send"

Jan

PS:
Meant the parellel version of the PLH.
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Last edited by Variac; 23rd July 2013 at 01:13 AM.
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Old 22nd July 2013, 11:48 PM   #1162
propitious is offline propitious  United States
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ACA dual mono power supply
To see what it sounds like, I am going to build a dual mono ps for my ACA's just because I have a bunch of capacitors and a pair of Antek 50VA 15VAC transformers lying around. With a 1ohm load I am not sure what exactly the rail voltage will be. Would it matter if the voltage is closer to 20VDC than 19VDC? If so, should the voltage on Q1 be adjusted a little higher than 10VDC?
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Old 23rd July 2013, 12:17 AM   #1163
Zen Mod is offline Zen Mod  Serbia
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just go for it

no need for readjusting for so small difference
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Old 23rd July 2013, 01:12 AM   #1164
Loudthud is offline Loudthud  United States
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The distortion at 1W changes quite a bit as you adjust the pot. I documented this earlier in this thread as far as distortion plots will show. A serious listening test is the only way to determine what you will like. Changes as small as 1V are easily measurable.
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Old 23rd July 2013, 12:58 PM   #1165
speedless is offline speedless  Denmark
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Hi
Quote:
I really would haved liked to order a kit but unfortunally the price for a kit from US,send to Denmark is ridiculus,not blaming aca,its the shipment and on top 25% danish tax.The pcbs alone at 20$ will end up near to 60$
Jan
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Old 23rd July 2013, 01:01 PM   #1166
boatbuilder is offline boatbuilder  Netherlands
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it is such a simple design.
just point to point it.
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Old 23rd July 2013, 02:30 PM   #1167
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by Loudthud View Post
The distortion at 1W changes quite a bit as you adjust the pot. I documented this earlier in this thread as far as distortion plots will show. A serious listening test is the only way to determine what you will like. Changes as small as 1V are easily measurable.
agree with that

my comment was about difference between 19 and 20V PSU , while setting procedure remains the same
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Old 24th July 2013, 04:01 PM   #1168
boatbuilder is offline boatbuilder  Netherlands
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Default heatsinks

would this heatsink be enough for one channel?

size is 12 X 8 X 8 CM backplate is 7 or 8 MM
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Old 24th July 2013, 04:08 PM   #1169
Eric is offline Eric  United States
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I would think that sink is perfect for one channel. My guess is that it might run a bit cool.
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Old 24th July 2013, 04:11 PM   #1170
boatbuilder is offline boatbuilder  Netherlands
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thanks Eric.
maybe you are right and it will run a bit cold, would be my second class a that does not get hot. although, this is not going to be mine, my son is going to build it,...... with my help.
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