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<DIV>Scotty</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Did you mean U3 instead of U2? My schematic shows U2 as the 5 V
regulator and</DIV>
<DIV>U3 as the 12 V regulator?</DIV>
<DIV> </DIV>
<DIV>73 de Joe</DIV>
<DIV>K1RQG</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 6/15/2010 3:02:55 P.M. Eastern Daylight Time,
scotty@tonks.com writes:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 10px; MARGIN-LEFT: 10px"><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>*****
High Performance Software Defined Radio Discussion List *****<BR><BR>Hi
Jack,<BR><BR>J10 appears on the schematic just below F1 in the upper left
corner.<BR><BR>Here is a link to the production
schematic:<BR>http://openhpsdr.org/support/LPU/lpu_B.pdf<BR><BR>In order to
get voltage to the fan connector, you must short across <BR>F1, which is
a DNI part (normally only used if you install the <BR>optional 3.3V regulator
parts).<BR><BR>So just solder a resistor lead across F1 and you will have
power to your fan.<BR><BR>The fan is supplied with your DC input voltage, so
it will be <BR>somewhat higher that 12.0V (typically 13.8V). If you need
12.0V <BR>maximum, you will have to jumper J10 pin 2 over to U2 pin 2 (and
<BR>leave off the jumper across F1). This will load your 12V regulator
<BR>with the fan current, so make sure you keep within the 2A maximum rating
of U2.<BR><BR>73,<BR>Scotty WA2DFI<BR><BR><BR><BR>At 12:40 2010-06-15 -0400,
Jack Speer wrote:<BR>>***** High Performance Software Defined Radio
Discussion List *****<BR>><BR>>I want to install a 3 pin Artic Cooler
Pro TC, 92mm fan which has a <BR>>temperature sensor on a cable into the
HPSDR Pandora
enclosure.<BR>><BR>><http://www.arctic-cooling.com/catalog/images/ARCTIC_F_Pro_TC_press_release_Eng.pdf>http://www.arctic-cooling.com/catalog/images/ARCTIC_F_Pro_TC_press_release_Eng.pdf
<BR>><BR>><BR>>I have planned on using the LPU, 3 pin polarized
connector I placed <BR>>on the LPU board per instructions (I don't see the
J10 pins on the schematic).<BR>><BR>>The pins do not appear to have any
voltage. The fan requires 6-12 v to run.<BR>><BR>>Help
please.<BR>><BR>>Jack,
N1BIC<BR>><BR>><BR>><BR>>_______________________________________________<BR>>HPSDR
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