[hpsdr] Mercury sensitivity problem

[Jose V. Gavila]

Hi Greg and all the List,

I seem to have GOOD NEWS!!!

I have carefully redone the soldering of the preamp... and it is working 
fine for some minutes! (before, it failed within seconds)

I can't claim victory yet, but this shows that the failure is on that 
area. Nice :-)!

Best regards,

JOSE

El 08/09/2012 22:27, Greg - ZL3IX escribió:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Jose,
>
> Just make sure you check the soldering before changing the chip. The
> soldering is much more likely to be the problem.
>
> 73, Greg, ZL3IX
>
>
> On 2012-09-09 06:58 a.m., Jose V. Gavila wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi all,
>>
>> I have uploaded a video of the problem. Sorry, comments are in
>> Spanish, but it is easy to understand what happens if you read below.
>> It is at:
>>
>> http://jvgavila.com/hpsdr/samples/mercury_preamp_failure.mpg
>>
>> I start the unit and sensitivity is way down the right one. Then, I
>> apply cooling spray (you will hear the noise) to the Mercury preamp
>> and, suddenly, it comes to life. In short time, once it gets hot, it
>> fails again.
>>
>> I think I have a culprit :-)!
>>
>> Regards,
>>
>> JOSE

-- 
73 EB5AGV - JOSE V. GAVILA - IM99sm La Canyada - Valencia(SPAIN)
    http://agvradio.com  AGVradio
    http://jvgavila.com  Personal WEB

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