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Old 31st October 2012, 07:14 PM   #171
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Leds have a wide range of current they work with. It is really hard not to enlighten them.
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Old 31st October 2012, 07:56 PM   #172
studeb is offline studeb  United States
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Okay then this: WP710A10LGD Kingbright | Mouser

2mA, green, diffuse and from Kingbright
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Old 31st October 2012, 08:11 PM   #173
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by studeb View Post
Okay then this: WP710A10LGD Kingbright | Mouser

2mA, green, diffuse and from Kingbright
Good choice
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Old 31st October 2012, 08:26 PM   #174
FdW is offline FdW  Netherlands
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The LED's in the PSU operate at 886uA, the WP710A10LGD has a voltage drop of (about) 1.86V at 886uA (estimated from the graph in the datasheet). This is giving a reference voltage of 9 * 1.86V = 16.74V. The trimmer is 2K and needed (to adjust for 18Vdc) is 18V - 16.74V = 1.26V, 1.26V - 600mV(Vbe of the transistor that 'reads' the reference) = 620mV, 620mV / 886u = 699 Ohm (or there about ). So this should work nicely.

Last edited by FdW; 31st October 2012 at 08:29 PM.
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Old 31st October 2012, 08:30 PM   #175
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Old 1st November 2012, 12:00 AM   #176
studeb is offline studeb  United States
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For your perusal.
I still have to check pin spacing when applicable.
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File Type: zip Paradise.zip (4.0 KB, 117 views)
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Old 1st November 2012, 12:03 AM   #177
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Thanks, this is very helpful. On first scan it looks ok.
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Old 1st November 2012, 11:21 PM   #178
studeb is offline studeb  United States
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here is an improved version, with spacing for the elect caps. Alternate part numbers for Nichicon KT/KA and Elna Silmic II are included as well. I think that everything is included except for CMF/RN55 resistors.

I do not think its a problem to bend the leads, and its hard to find 5mm spacing for the small caps in stock at Mouser (i am lazy and trying for one stop shopping )
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Old 1st November 2012, 11:58 PM   #179
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Any volunteer to check this ? I am out of time. I am leaving for Krefeld over the weekend.
There is the AAA analog show. The Paradise is playing in Andrejs system. Also in the Fast Audio room the "Tanzmusik" Phono with tone control i designed with Sigurd Ruschkowski and Ward Maas. I also show a subwoofer for the Kiso speakers from Japan. My new JG1 preamp is playing in Wolf von Langas system and i just finished my entry level preamp. Its called " Das unbeschriebene Blatt ". I do not know how to translate this into english. It has MM,MC, Line inputs, Line Out, Phono Direct, Line high pass filtered and a Headphone Out. i will have lots to do and explain.
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Old 2nd November 2012, 12:01 AM   #180
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The blank page ?

Dont worry about the BOM, i was only concerned about the zeners and something else that escapes me now.
They have been verified.

Last edited by studeb; 2nd November 2012 at 12:06 AM. Reason: thought about a better translation
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