[hpsdr] Excalibur checkout

Graham / KE9H KE9H at austin.rr.com
Wed Mar 17 14:47:46 PDT 2010


Chris:
You are OK to power up. 
You are only looking for shorts.
Different Ohm-meters will give Ohm different values, based on the
voltage it is using.
--- Graham

==

Chris Smith wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> OK. Next problem. I finished Excalibur this morning after winding the toroid.
>
> Then, following the "Checkout prior to first power application",  I checked the DC resistances from the 3 voltage TPs.
>
> +6V was just about spot on at 2.5K to ground and +3.3V was close at 104K to ground BUT +5V to ground reads 14.4K to ground - more than 3 times what the manual suggests.
>
> Should I be worried? I haven't yet applied power as I've had to work for my living today but was hoping to plug Excalibur into the Atlas back-plane tomorrow.
>
> What have others found at this check? Any thoughts would be appreciated.
>
> Cheers
>
> Chris
> G4NUX
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