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Old 7th October 2011, 10:24 AM   #671
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Received this morning the BIII % & the 4-Channel S/PDIF Input and Switch Module Kit.
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Old 7th October 2011, 10:28 AM   #672
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C'mon get it working then...it took me 4.5 hours to get it up and running..anyone faster?
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Old 7th October 2011, 01:11 PM   #673
4est is offline 4est  United States
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Default Heat

Both my Placid and then an LCDPS were getting too hot using the stock 9v transformer. I just ordered new heatsinks and an 8v transformer to help. I had already used larger (2") heat sinks on the LCDPS. I have 2.5" coming, but I expect the lower voltage to help the most. If you are over 9v AC, I'd plan on reworking the heatsinking. At least bolt it on the board instead of soldering it as it will be easier to remove later...
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Old 7th October 2011, 01:19 PM   #674
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Quote:
Originally Posted by 4est View Post
Both my Placid and then an LCDPS were getting too hot using the stock 9v transformer. I just ordered new heatsinks and an 8v transformer to help. I had already used larger (2") heat sinks on the LCDPS. I have 2.5" coming, but I expect the lower voltage to help the most. If you are over 9v AC, I'd plan on reworking the heatsinking. At least bolt it on the board instead of soldering it as it will be easier to remove later...
Define "too hot."

I have been running a B-III on a testbed from a LCDPS (1" hs) continuously for > 2 months without issues.

The Placid is a shunt regulator, and is designed to run hot.
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Old 7th October 2011, 02:09 PM   #675
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Question Preparing the board for stereo operation

Reading the BIII DAC Integration Guide Revision 1.0.2 chapter "Preparing the board for stereo operation" I have a doubt when Leon wrote "place the jumpers J1-J12 (J1-J12, 6-17) at the underside of the board" isn't clear: I have to place all 12 jumper J1 to J12 so 12 jumpers in total? I don't understand "6-17"?
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Old 7th October 2011, 02:13 PM   #676
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Default Define "too hot".

I switched to an LCDPS because I thought it might run cooler, the opposite was the case- and that is with the bigger heat sink. I'd have to buy a thermometer too be sure, but it is hot enough where I would fear early failure. I am fairly tolerant to heat, but I can only hold a finger on it for a few seconds. It makes my Pass Alephs seem cool in comparison.

2 months without issues? Is that 24/7 in a (vented) chassis or open on a bread board possibly... Besides, transistor failure is related to junction heat. Just because it has worked for two months, does not mean that it will not fail prematurely.

Last edited by 4est; 7th October 2011 at 02:24 PM.
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Old 7th October 2011, 02:13 PM   #677
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Quote:
Originally Posted by merlin el mago View Post
Reading the BIII DAC Integration Guide Revision 1.0.2 chapter "Preparing the board for stereo operation" I have a doubt when Leon wrote "place the jumpers J1-J12 (J1-J12, 6-17) at the underside of the board" isn't clear: I have to place all 12 jumper J1 to J12 so 12 jumpers in total? I don't understand "6-17"?
"6-17" refer to the callouts in the board diagram. Click on the "J1-J12" link in the text and it display the board diagram showing the jumper locations.
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Old 7th October 2011, 02:35 PM   #678
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I don't understand "6-17"?
It was explained at page 7: "In the text the reference (<part>, <number>) will be used, where <part> is the marking on the board, and <number> means the number of the part as found in the lay-out. In general, the reference will also act as a hyperlink which leads back to either the top or bottom lay-out, depending on location of the part.".

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Both my Placid and then an LCDPS were getting too hot using the stock 9v transformer.

That's strange, because I'm using the BII with Tridents which uses even more power than the BIII, and I'm also powering a few things like the Mux and Toslink receiver. Yet I don't think my Placid (non-HD) gets that hot. Are you sure you've tuned it for the correct amount of current? And have you wired the transformer correctly for your voltage range?
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Old 7th October 2011, 02:37 PM   #679
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Thanks Brian, so I have to solder all 12 jumpers J1-J12 = callouts diagram 6-17.
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Old 7th October 2011, 02:39 PM   #680
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Yes.
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