[sdiy] looking for high gain low noise preamp

[pata at ieee.org]

Hi Jean and the List,

I love SSM2019.
Its audio characteristics are excellent.
But not suitable for working with battery power.

Cheers,

Taku 



2018/08/15 10:44、Jean Bender <lofideadbeat at gmail.com>のメール:

> Hi !
> Would people here give me some advice for building à low noise high gain (70db) preamp ?
> As it would be used with my LOM Instruments Priezor, it would be better if it was battery powered..
> I'd like to use it with my old zoom h4..
> I've looked After vlf antennas preamp but i don't think it would fit, and i'm à bit lost with what i've found on Google..
> Any help or schematics Will be apreciated !
> Best to all
> J.
> 
> Le mer. 15 août 2018 02:28, <tprivitera at nc.rr.com> a écrit :
>> Thanks all for the tips.  Had to put the project aside for a little bit as things have gotten super busy at work.  Hope to dig in and troubleshoot more next weekend. Appreciate the guidance on where to look.
>> 
>> Tim
>> ---- Michael E Caloroso <mec.forumreader at gmail.com> wrote: 
>> > If the firmware is operating then it isn't the memory.
>> 
>> Battery is only an issue after power down.  If your patches don't save
>> correctly without powering down, then it isn't the battery.
>> 
>> More likely you have a bad IC in the multiplexing or demultiplexing system.
>> 
>> MC
>> 
>> On 8/13/18, Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:
>> >
>> >> On 12 Aug 2018, at 19:16, tprivitera at nc.rr.com wrote:
>> >>
>> >> Maybe the battery?
>> >
>> > would be my first choice to check.
>> > only if battery, power supply voltages (under load!) etc. check out ok I’d
>> > look for patterns in the problem.
>> > otherwise further troubleshooting would be moot.
>> > m.
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