[hpsdr] Hermes BOM Corrections

Rob Frohne rob.frohne at wallawalla.edu
Tue Oct 9 15:05:18 PDT 2012


Hi Abhi,

Has this information been incorporated in the latest BOM on your web 
site?  It appears it may not , because the date for that file in 
September 17.  If it is out of date, could you fix it up, and let us know?

Tnx  & 73,

Rob
KL7NA
On 10/05/2012 04:17 AM, Abhi A wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Hi All,
>
> For those making their own Hermes cards, please note corrections below,
>
> Hermes BOM Corrections:
>
> 1. R102 & R145 are shown under item 4, 10nF Capacitor. I suspect this is
> intentional, but just want to check it's not a typo?
> R102, R145 are bypass resistors in case you do not want to use SW1, if 
> using SW1 they can either
> be populated by 10nf caps or left unpopulated
>
> 2. Item 18 is shown as a 47uF capacitor, but the Digikey part number 
> is for
> a 0.047uF capacitor. Should this show 47nF?
> C185 was changed to a lower value for high frequency suppression
>
> 3. Item 54 is shown as LFCV-52+ in one column, but a LFCN-80+ in another
> column. Which is the correct part?
> This filter was changed to the LFCV-52+
>
> 4. Item 78 shows a value of '220E', the part number is for a 180R 
> resistor.
> 220E is the correct value
>
> 5. Item 92 is shown as a 63.4K resistor, the digikey part number in the
> last column is 63.4K, but the part number in the first column is 12K.
> 63.4K is the correct value
>
> Corrections pointed out by Mike:
>
> line, item, comment, correction
> 48, 10,  "R126,R146",  "C126,C146"
> 58, 19, no digikey #, 587-1295-1-ND
> 104, 54,  535-10442-1-ND is 0402 size,  535-10493-1-ND is 0805 size
>
> 73s,
>
> Abhi
>
>
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-- 
Rob Frohne, Ph.D., P.E.
Professor
Walla Walla University
100 SW 4th Street
College Place, WA 99324
(509) 527-2075

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