[FUN_Mail] AM3100 Intracellular amplifiers

[Bob Calin-Jageman]

We’ve used the AM amps for years, some from AdInstrument packages, some
from AM directly.

We’ve had problems over the year's with the amps that came from
AdInstrument packages— noise and power source issues.  AM helped service
these for us at a good price: we shipped to AM, they serviced and
calibrated and shipped back.  Given that the amps say they need periodic
calibration anyway this ended up being a good and cost effective solution
for us.

All this to say: The AM folks were really nice and could probably fix these
up for you at a decent price, and I feel like these are good amps but with
some bad mojo when purchased with an AD package.

Bob



-------------------
Bob Calin-Jageman
https://calin-jageman.net/lab/ <http://dr-bob.homeip.net>



On Thu, Mar 20, 2025 at 2:48 PM Ashley L Juavinett <ajuavine at ucsd.edu>
wrote:

> Hello FUN colleagues —
>
> I hope you’re taking care of yourselves right now.
>
> I’m reaching out with a mundane request, hoping to tap into the deep
> electrophysiology knowledge in this group. We’ve been having repeated
> issues with our AM3100 Intracellular amplifiers
> <https://www.a-msystems.com/p-201-model-3100-intracellular-electrometer.aspx> after
> about ~6 years of using them. They’re either very fickle or have stopped
> working entirely (the immediate symptom is the DC offset does nothing,
> and/or Ohm test doesn’t work).
>
> I’m writing hoping that someone has experience with AM3100 amplifiers and
> ideally even an idea of what’s going wrong with them or how to fix it. AD
> Instruments (who we purchased these from, along with PowerLabs) has not
> been useful.
>
> (For what it's worth, we have some old Getting amps and we’ve been slowly
> replacing the AM3100’s with those, but I’m hoping to fix the AM3100s if
> possible.)
>
> Thanks in advance for any insight (or even just sympathy) you can offer.
>
> Sending lots of care from California,
> Ashley
>
>
>
> - - -
> *Ashley Juavinett, Ph.D.*
> Associate Teaching Professor
> STARTneuro <https://startneuro.ucsd.edu/> Co-Director
> Neurobiology Faculty Advisor
> *UC San Diego School of Biological Sciences*
> *Neurobiology Department*
> Office: HSS 8072
> Pronouns: she/they
>
>
>
>
>
>
>
>
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>
>
>
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