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Old 3rd November 2012, 10:50 PM   #211
pdul is offline pdul  Denmark
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There is a preregulator for the paradise on the drawing table already. If you cant wait, you should at least go for a board with c-r-c possibility.


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Old 3rd November 2012, 11:12 PM   #212
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by Max1410 View Post
Im going to order the parts for the Paraise. At the opportunity I want also order the capacity for the PSU.
Is this PSU good enoguht?
BLANK PROTOTYPING Power Regulator Board PSU PCB BOARD fr TUBE POWER AMPLIFIER | eBay

of course with ultra fast diodes and Caps Panasonic TSHA.

Or it is planned an own PSU "Paraise"?
What Trasformers I need?

Norbert
That will work fine. But... it would be nice to see some snubbers on those diodes, and to see a few 10ohm (or so) resistors between those big caps.
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Old 3rd November 2012, 11:14 PM   #213
FdW is offline FdW  Netherlands
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And, like pdul said, there is the pre-reg being constructed
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Old 3rd November 2012, 11:50 PM   #214
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by Max1410 View Post
Im going to order the parts for the Paraise. At the opportunity I want also order the capacity for the PSU.
Is this PSU good enoguht?
BLANK PROTOTYPING Power Regulator Board PSU PCB BOARD fr TUBE POWER AMPLIFIER | eBay

of course with ultra fast diodes and Caps Panasonic TSHA.

Or it is planned an own PSU "Paraise"?
What Trasformers I need?

Norbert
Ooops, missed the transformer question, got to Mpp #7127 and check it out
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Old 4th November 2012, 09:37 PM   #215
Max1410 is offline Max1410  Germany
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Thanks
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Old 5th November 2012, 09:54 AM   #216
hesener is offline hesener  Germany
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Quote:
Originally Posted by Joachim Gerhard View Post
Leds ....... It is really hard not to enlighten them.
Wish it were the same for all of us ;-) But Paradise will help.....
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Old 5th November 2012, 02:34 PM   #217
Nick77 is offline Nick77  United States
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What is X value for resistor on BOM r104b, r204b ??
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Old 5th November 2012, 02:40 PM   #218
hesener is offline hesener  Germany
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What is X value for resistor on BOM r104b, r204b ??
Hi Nick, these are just placeholders, to finetune the CCS current if need be. You can safely ignore them for now
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Old 5th November 2012, 07:51 PM   #219
pdul is offline pdul  Denmark
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I am now running my boards without the servo opamps, and it seems to solve my oscillation problem, now the offset is very stable but very high too
Could it be, that the opamps are not fast enough, or maybe in need of some bypass caps?
I have tried AD711 instead with same bad result.
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Old 5th November 2012, 07:58 PM   #220
RCruz is offline RCruz  Switzerland
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Please verify the solderings on the jfets of the output buffers.
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