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Old 15th March 2012, 09:20 AM   #491
Salas is online now Salas  Greece
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Some intermittent LED or associated component/solder joint?
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Old 15th March 2012, 09:29 AM   #492
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Will check the solder joint again. If re-soldering does not solve the problem will replace the LED. Thanks Salas.
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Old 15th March 2012, 12:04 PM   #493
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changed the Led strings yield nothing. check the q1, turned out to be bad. changed it with a new one and everything is ok again. curious, how the q1 got damage?
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Old 15th March 2012, 12:32 PM   #494
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Static maybe.
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Old 10th April 2012, 02:02 PM   #495
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At last, manage to finish my mesmerize and listen to it. It is very relax and open sound paired with my elektor mini crescendo amp. Thank you to Mr. Salas for the design and help. Also thanks to Ed for those hard to find relays. I finished building my hypnotize board but decided to built the mesmerize first because I had a suitable enclosure for mesmerize size.
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Old 10th April 2012, 02:06 PM   #496
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Now, if I can finish my mini A, F5, Aleph 2 and better speaker using Jordan JX92S......
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Old 10th April 2012, 03:55 PM   #497
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Very nice and you are welcome. This is a gen1 single layer Hypnotize board though. Not a Mezmerize.
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Old 10th April 2012, 04:16 PM   #498
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Quote:
Originally Posted by ggetzoff View Post
What are the dissipation requirements of the current setting resistor at 3r3?

Thanks,

Greg
Greg,

If you look at Salas hotrodded blue DCB1 build .... Post 1795.

Those sinks were at 55 Degrees with 3R0. I went back to 10R. I might just try 4R7 in the future.

Andy

Last edited by KatieandDad; 10th April 2012 at 04:19 PM.
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Old 22nd April 2012, 12:20 PM   #499
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Default Offset Problem

Hello,

Ive finished my Mezmerize DCB1.
The measurements are:
- 9,8V
+10,31V

DC-Offset
R -2,2mV
L -37,1mV

Every part is matched and measured before soldering (the LED sets and SK170
are from Ed).

What could be the reason for this bad offset?
Do I have to change some LEDs.

DCB1 02.jpg

Thanks for your help

Andreas
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Old 22nd April 2012, 12:22 PM   #500
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Have you got the 2SK170s with their correct matched pair?

Don't connect it to an amp just yet.

Measure the voltage across each LED to see if we can't match the rails a bit better. The absolute voltage isn't that important but V+ should be within 100mV (or better) of V-.
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