<div dir="auto">Hi !<div dir="auto">Would people here give me some advice for building à low noise high gain (70db) preamp ?</div><div dir="auto">As it would be used with my LOM Instruments Priezor, it would be better if it was battery powered..</div><div dir="auto">I'd like to use it with my old zoom h4..</div><div dir="auto">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..</div><div dir="auto">Any help or schematics Will be apreciated !</div><div dir="auto">Best to all</div><div dir="auto">J.</div></div><br><div class="gmail_quote"><div dir="ltr">Le mer. 15 août 2018 02:28, <<a href="mailto:tprivitera@nc.rr.com">tprivitera@nc.rr.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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.<br>
<br>
Tim<br>
---- Michael E Caloroso <<a href="mailto:mec.forumreader@gmail.com" target="_blank" rel="noreferrer">mec.forumreader@gmail.com</a>> wrote: <br>
> If the firmware is operating then it isn't the memory.<br>
<br>
Battery is only an issue after power down. If your patches don't save<br>
correctly without powering down, then it isn't the battery.<br>
<br>
More likely you have a bad IC in the multiplexing or demultiplexing system.<br>
<br>
MC<br>
<br>
On 8/13/18, Michael Zacherl <<a href="mailto:sdiy-mz01@blauwurf.info" target="_blank" rel="noreferrer">sdiy-mz01@blauwurf.info</a>> wrote:<br>
><br>
>> On 12 Aug 2018, at 19:16, <a href="mailto:tprivitera@nc.rr.com" target="_blank" rel="noreferrer">tprivitera@nc.rr.com</a> wrote:<br>
>><br>
>> Maybe the battery?<br>
><br>
> would be my first choice to check.<br>
> only if battery, power supply voltages (under load!) etc. check out ok I’d<br>
> look for patterns in the problem.<br>
> otherwise further troubleshooting would be moot.<br>
> m.<br>
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