[hpsdr] PicoPSU

[Eric Ellison]

Chris

Took the words right outten my mouth. Ideal tool!

Course I hope you know you are workin' your way right into our first QST
article. "Constructing, Powering and Packaging the TAPR-HPSDR Atlas
Backplane" by Christopher Day - AE6VK

(Smile)

Eric


-----Original Message-----
From: Christopher T. Day [mailto:CTDay at lbl.gov] 
Sent: Thursday, June 08, 2006 11:43 PM
To: Eric Ellison; Lyle Johnson
Cc: hpsdr at hpsdr.org
Subject: RE: [hpsdr] PicoPSU

I'm open to suggestions. Remember that I don't (yet) have a lot of test
equipment. Probably my SDR-1000 is the best tool available for
monitoring if someone can suggest a pick-up methodology. I don't have a
load for it either, but power resistors that don't have to be on-board
are cheap. Any suggested values?


	Chris - AE6VK


-----Original Message-----
From: Eric Ellison [mailto:ecellison at comcast.net] 
Sent: Thursday, June 08, 2006 8:22 PM
To: 'Lyle Johnson'
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] PicoPSU

***** High Performance Software Defined Radio Discussion List *****

Lyle

Thanks points well taken, as usual...

Chris is there any way to measure how much 'hash' that little jewel you
have
puts out?

Here is one site. The 60 watt variable dc in is listed at 59 bux, and no
quantity breaks given. This is probably not the OEM, but it looks like
oem
price in large quantity is probably about 30 bux or so. I think the
various
supply currents are listed.

http://www.mini-box.com/s.nl/sc.8/category.13/it.A/id.417/.f

Folks:

This is just a 'flyer for' evaluation, not a yea/nay vote. If it is a
do-able thing, and we have a technical consensus here, we can put it to
a
vote on the Cool! Aid page.

Thanks
Eric






-----Original Message-----
From: Lyle Johnson [mailto:kk7p at wavecable.com] 
Sent: Thursday, June 08, 2006 11:11 PM
To: Eric Ellison
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] PicoPSU

> The 60/80W (80 watts peak) version uses a variable dc input from 6 to
26 
> VDC input which would be ideal for mobile use or powering off a 
> "station" power supply.

This would be my preferred solution.

It might be helpful to list the voltages and currents the supply is 
capable of.  I suspect most of the power is +5V or +3.3V.

> The 120 W version uses a fixed 12 V regulated power input and Chris
says 
> it drops out at 13+ volts.
> 
> Is 60W likely to be able to power 3 or 4 or more project boards?

Yes.  If we have a Tx that runs power, it will probably run from 13.8 
VDC or some other voltage, not supplied by or through the Atlas
backplane.

> Also how many folks would be interested in this type of supply.

If I knew it was sufficiently quiet to include a decent receiver in the 
same box, I'd be very interested.  But if it is noisy, then for many 
radio applications it wouldn't be suitable.  Like the old 
liner-to-switching-to-linear 5V regulator exercise we went through with 
the SDR-1000 back in '03.

73,

Lyle KK7P


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