[hpsdr] PicoPSU

[Philip M. Lanese]

Is the ubiquitous "This device complies with FCC Part 15 ... " stick-on label
attached to these power supplies?

A good indicator as to how much 'gratch' you will have to overcome in sensitive
RF environments.

Phil, K3IB

----- Original Message -----
From: "Christopher T. Day" <CTDay at lbl.gov>
To: "Lyle Johnson" <kk7p at wavecable.com>; "Eric Ellison" <ecellison at comcast.net>
Cc: <hpsdr at hpsdr.org>
Sent: Thursday, June 08, 2006 11:34 PM
Subject: Re: [hpsdr] PicoPSU


> ***** High Performance Software Defined Radio Discussion List *****
>
> picoPSU-60-WI:
>
> Volts (V) Max Load (A) Peak Load (A) Regulation %
> 5V 6A 10A 1.5%
> 5VStand By 1.5A 2A 1.5%
> 3.3V 6A 8A 1.5%
> -12V 50mA 50mA 5%
> 12V 400mA 450mA 3%
>
> Overload protection cuts in when either major rail > 200% Max
> Load.
>
>
> picoPSU-120
>
> Volts (V) Max Load (A) Peak Load (A) Regulation %
> 5V 6A 10A 1.5%
> 5VStand By 1.5A 2A 1.5%
> 3.3V 6A 8A 1.5%
> -12V 50mA 100mA 5%
> 12V 7A 10A =
> Switched Input
>
> Same overload protection.
>
>
> Obviously, the higher power version(s) [there is also an 80W version]
> provide the 12V by feeding through the switched supply; the real work is
> in the 5V and 3.3V supplies. Unless one of the boards uses a lot of 12V
> current, which Lyle was _not_ going to do, there is likely no difference
> from our perspective => picoPSU-60-WI is the right one for us, I think,
> subject to noise considerations.
>
>
> Chris - AE6VK
>
>
> -----Original Message-----
> From: Lyle Johnson [mailto:kk7p at wavecable.com]
> Sent: Thursday, June 08, 2006 8:11 PM
> To: Eric Ellison
> Cc: hpsdr at hpsdr.org
> Subject: Re: [hpsdr] PicoPSU
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> > 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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