[hpsdr] Mercury sensitivity problem

[Riho B., ES7AAZ]

Hola Jose,

I may send you both LTC6400 and LTC2208 for free. Just let me know
whether you need these or not.


73's
Riho, ES7AAZ.


9.09.2012 0:08, Jose V. Gavila kirjutas:
> ***** High Performance Software Defined Radio Discussion List *****
>
> 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
>

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