[hpsdr] picoPSU Noise Test - well, I still think they're cute.

[Robert McGwier]

WOW. That is nasty. For my part, I will be using my Shenzen Mastech 
bench supplies until I find one that is quieter than church mouse.

No, there is no point. That P.S. effectiveness for our project is right 
up there next to a screen door in a submarine. You really might have 
predicted this. From the pictures we have been seeing, EMI/RFI is not a 
consideration. There is insufficient filtering just from the component 
sizes and essentially no shielding whatsoever.

Bob



Christopher T. Day wrote:
> ***** High Performance Software Defined Radio Discussion List *****
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> Not so good.
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> <
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> http://www.hamsdr.com/personaldirectory.aspx?id=316
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> The above is a picture of the test setup. I used 5 turns of #20 magnet 
> wire left over from the PA-100 Filter Module, attached them to 6’ of 
> RG-58U coax through a bannan plug-to-BNC adapter, and draped the coil 
> over the picoPSU-60-WI. The other end of the coax went directly into 
> my SDR-1000.
>
> <
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> http://www.hamsdr.com/personaldirectory.aspx?id=317
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> {If this is too big to download, I’ll break it up.}
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> The above is the test result at 160m. Noise floor goes up 30db. Nuts. 
> I could do more, but is there any point?
>
> Chris – AE6VK
>
> P.S. – Any other ideas?
>


-- 
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
Laziness is the number one inspiration for ingenuity.  Guilty as charged!


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