[hpsdr] SOLVED Tapr hombrew hermes shutdown problem

[Kjell Karlsen]

Hi Stijn.

I wonder if you have the correct BOK?

The PCB you have, is it from the Pre-production from TAPR or is it one of  
the Pre-Pre-production that were left over and sold out?

73, Kjell




På Wed, 20 Feb 2013 12:57:10 +0100, skrev Stijn Nestra <stijn at pe1rks.nl>:

> ***** High Performance Software Defined Radio Discussion List *****
>
>
> Hi Oliver,
>
> On my TAPR build Hermes the fuses are:
>
> F1: Bourns MF-MSMF050 / 500mA hold current 15V max
> F2: BellFuse 0ZCC0160BF2C / 1,6A hold current 16V max
> F3: BellFuse 0ZCC0300FF2B / 3A hold current / 6V max
>
> I hope this helps.
>
> 73 Stijn PE1RKS
>
> ps. I must say that it is pretty hard to build your own Hermes board, I  
> am also in the process to build my own. The big problem is that there is  
> no correct BOM. Parts are missing or simply the wrong value or wrong  
> part number.
>
> Op 19-02-13 22:17, Oliver Goldenstein schreef:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>
>>
>>
>>     Puh....i replaced F3 by  a 2 A fuse i had in the box and the board
>>     is now alive since one hour. Programmed the new Firmware with
>>     HPSDRProgrammer V2.
>>
>>     Many thanks Phil!
>>
>>     I learned a lot in understanding those fuses by the bourns  
>> whitpapers:
>>
>>     http://www.bourns.com/multifuse/
>>
>>     It could be that the fuse was active before. With every use the trip
>>     current gets lower.
>>
>>     So good to know to have something on board that works so well :-)
>>
>>     I ordered some fuses 2 / 2,5 / 3 Ampere hold current.
>>
>>     Is it suggested to replace F1, F2 by the 2 A and F3 by the 3 A one ?
>>     The schematic shows 2 A (hold current) for all three?
>>
>>     73 Oliver DL6KBG
>>
>>
>>
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