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Old 28th August 2010, 11:45 AM   #161
Salas is offline Salas  Greece
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Quote:
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Hi salas:

use +/- 20V DCin not too high voltage input?, because dcb1 just use +/- 10v DCin

mikeliu
Its better, although it will still regulate with lower difference.

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Hi salas:

so we choose +/- 15V AC output trafo right?
Right.
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Old 28th August 2010, 11:54 AM   #162
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Hi salas:

so we choose +/- 15V AC output trafo right?
Yes, use a 15-0-15 transformer if possible for 10V DC
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Old 28th August 2010, 06:54 PM   #163
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Default 1st power up

I am still waiting to the Texas Components TX2575 resistors, but the rest is ready to show

Click the image to open in full size.

The other resistors are PRP9372 and the four 470R at the gates are Takman REX carbon film.


Click the image to open in full size.

Click the image to open in full size.


Because im also waiting to a special made shielded transformer, i use one of my 12V secondaries from my DAC project transformer for the 1st power up.

Click the image to open in full size.

Everything works perfect!
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Old 28th August 2010, 07:09 PM   #164
Salas is offline Salas  Greece
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Nice big informative pictures. Is the heat on the small sinks comfortable with 22R CCS setting resistors? V+/V- OUT you hit close together?
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Old 28th August 2010, 07:28 PM   #165
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Originally Posted by Salas View Post
Nice big informative pictures. Is the heat on the small sinks comfortable with 22R CCS setting resistors? V+/V- OUT you hit close together?
The heatsinks are perfect. With only one 12VAC input i have +10,09 VDC and a -10,16 VDC at the outputs.
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Old 28th August 2010, 07:39 PM   #166
Salas is offline Salas  Greece
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Looks in good order. Till listening then.
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Old 28th August 2010, 07:56 PM   #167
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The first pic will be really helpful for some. Thanks for posting.
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Old 28th August 2010, 08:40 PM   #168
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Thank you both and crt for this project!
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Old 28th August 2010, 08:51 PM   #169
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Thank you both and crt for this project!
Beautiful work!

Are your 220K resistors also TX2575's? Do they make single 220K resistors or are they a series daisy chain of several resistors?

See here to understand what I mean.

Anand.
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Old 28th August 2010, 08:52 PM   #170
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That's some extremely extravagant components you're using there.

Is there a real advantage to using "audio signal path grade" resistors such as the PRPs for the shunt reg and delay? I have used bog-standard .6W metal film Vishay Sfernice for mine and Tea-Bag's supplied PRPs in the audio path. I will post pictures when I've finished the delay.

Also, what milli-ampage are you pulling with those Mills 22Rs? Was there a particular reason you chose not to stick with the 10R Dales?

Great pictures. Many thanks for that!
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