[hpsdr] [newbie startup] where do i get a power supply for my power supply?

[Dick Faust]

Erik
The LPU does accept 13.6 VDC nominal input and provides a pass through 
connection.  If you view the schematic and specs available on the wiki, 
you will find that this is so.
http://openhpsdr.org/wiki/index.php?title=LPU

You can use a switcher or a linear mode power supply, but if doing any 
weak signal work you should consider a linear supply.  Astron makes a 
variety of linear units at different capacities, but not the only source.

The connectors are Power Pole and I have had  a good experience with 
Power Werx with my orders

Power Werx also has some very good info on assembling Power-Pole - and 
good component drawings and FAQs.

Home Page
http://www.powerwerx.com/

For General Assembly
http://www.powerwerx.com/assembly.asp

For help index: FAQs, Drawings, Shipping [domestic & international] etc
http://www.powerwerx.com/helpcenter.asp

Dick Faust K9IVB

Erik Anderson wrote:
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> Okay, I've been doing a bit of research and asking a few questions, 
> time to come back here and query the experts again about getting this 
> project at least up to smoketest level ;-)
>
> As there is no 13.5v output line on the LPU, I'm assuming that the 
> output described on the website is actually the input and is obviously 
> meant to be a battery input.  (I really don't want to know what 10A 
> draw would do to my 7Ah brick batteries though)
> (*) Can someone confirm that this thing is really expecting 10A, 
> especially with the BOM/schematic saying that it's PTC-fused to 5A (or 
> 7A with the 3.3v kit)?
>
> I have been told that a 12v power source will not work with this due 
> to the regulators, I'm guessing that U4 in particular will not be fond 
> of an input voltage so near its output voltage.
> (*) DigiKey only has a single 13.5v transformer on their entire 
> website (8A switched, Part T1051-P51-ND), would this be a good choice 
> (especially as it's under-rated), does the switching introduce noise 
> that the LPU cannot regulate back out again?
> (*) I've had one person say that a power source would contain a 
> transformer, rectifier, and regulator and that for 10A my best bet 
> might be to order the parts and build my own somewhere.
>
> The guy at the local hardware store recognized the power connectors on 
> the board as being manufactured by some company like STEXA or 
> something (only saw the name for a few seconds), says that they're 
> rated at 15A and 16AWG and that he can special-order them.
> (*) Why are there two pairs of connectors, especially if each 
> connector can handle the full power load and the schematic shows that 
> they are shorted against each other?
>
> Again, thank you all for your help and patience.
> Erik Anderson KE7YOA
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