[hpsdr] LPU Installation

Bill Tracey bill at ewjt.com
Mon May 18 20:43:16 PDT 2009


Hi Joe -- nice sounding setup.  Good (but not all that surprising) to 
hear the LPU came in quieter than the Pico.

Glad to hear you're having fun with it.

Cheers,

Bill (kd5tfd)

At 05:46 PM 5/18/2009, joetorrey at cablelynx.com wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>I finished building and installing the LPU over the weekend. I have it
>installed in a cabinet with the janus/ozy, sdr1000, sdrIQ, control logic,
>2nd preamp (receive) and sensors (temp., current, voltage); this is my
>SDR. I could not use the supplied heatsinks; I fabricated my own by using
>two TO-220 heatsinks for each regulator. I did not have quite enough room
>in the cabinet with all of the other equipment already in there. I did not
>mount the LPU on the Atlas board; I mounted it in a better place for
>cooling purposes and less noise. I utilized a harness from a computer
>supply that had been used for parts; this worked really good.
>
>I have compared the LPU with my previous supply "PICO 120W @ WI" and the
>LPU is better; the noise floor is lower with the LPU.
>
>Thanks to all for all of the hard work with these improvements; I have and
>am thoroughly enjoying this venture.
>
>Joe
>WD5Y



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