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Old 25th October 2013, 04:29 PM   #271
gk7 is offline gk7
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The PLD 2000 looks interesting, did Parasound ever produce a phono stage to accompany it ?
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Old 25th October 2013, 05:19 PM   #272
bcmbob is offline bcmbob  United States
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John, We're gonna do our best to pull you back in, but if you only post to keep us on track that will keep us grateful and happy.
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Old 25th October 2013, 06:03 PM   #273
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Pull me into WHAT?
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Old 27th October 2013, 11:40 PM   #274
JKoch is offline JKoch  Poland
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Here is a next pcb design: DC Main Controller PSU. The module contains four regulators +5V, +12V and +/-19V to supply uController, relays and driver of attenuator.
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File Type: jpg DC Main Controller PSU Top-Bottom Layers Transparent 1.jpg (355.3 KB, 316 views)
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File Type: pdf DC Main Controller PSU.pdf (251.1 KB, 35 views)
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Old 27th October 2013, 11:49 PM   #275
bcmbob is offline bcmbob  United States
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Originally Posted by john curl View Post
Pull me into WHAT?
I'm betting you got at least one more scratch build on your bucket list.
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Old 29th October 2013, 11:58 PM   #276
JKoch is offline JKoch  Poland
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Improved pcb of DC Main Controller PSU adapted to 230VAC and 115VAC.
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File Type: jpg DC Main Controller PSU Top-Bottom Layers Transparent 1.jpg (390.5 KB, 276 views)
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File Type: pdf DC Main Controller PSU.pdf (265.0 KB, 22 views)
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Old 30th October 2013, 12:11 AM   #277
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Quote:
Originally Posted by john curl View Post
Sorry, it is the PLD-2000, NOT the HCA-2000. Please try again.
Hey JC,

How have you been doing lately? Good to hear from you!

Good idea about the PLD-2000

Ciao!
Do
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Old 30th October 2013, 12:23 AM   #278
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Quote:
Originally Posted by JKoch View Post
Improved pcb of DC Main Controller PSU adapted to 230VAC and 115VAC.
Very Nice JKoch,

Have you tried designing a regulator based on the TI TPS7A4700? Supposed to be real quiet supply.

Ciao!
Do
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Old 30th October 2013, 12:48 AM   #279
JKoch is offline JKoch  Poland
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The TI TPS7A4700 is quiet (4,17uV output voltage noise) but it is housing in VQFN package only. I need not such quiet regulator in this place and the TI TPS76750QD has fixed 5V, so is simpler to use (one resistor only). The regulator will be supplied 2 x PIC uControllers and 2 x LED displays.
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Old 5th November 2013, 10:27 PM   #280
JKoch is offline JKoch  Poland
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Next part of the Preamplifier: Attenuator Buffers.
Attached Images
File Type: jpg Attenuator Buffers Top-Bottom Layers Transparent 1.jpg (622.3 KB, 226 views)
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File Type: pdf Attenuator Buffers.pdf (259.8 KB, 46 views)
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