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Preamp & Interposer



Hi Yves,

I verified that the interposer had some bad solder joints and these have 
been fixed. The one you have should be good.

I checked the amplifier and indeed channel 16 was not working. Further 
tests revealed that the ASIC A input (for negative going signals or 
anodes) has been damaged. The B input (for positive going signals or 
cathodes) works fine.

Because I don't have additional preamp cards, I suggest that Gerard send 
you his preamp and I will send him yours, which he can use for his 
tests. I will ask Elke for additional funds to produce a few more preamp 
cards (we have a few ASICs left).

Gerard, let us know if if this works for you.

Regards,
Fernando
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tel;work:757-269-7433
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