[FUN_Mail] AM3100 Intracellular amplifiers

[Calton, Jeff L]

Hello, I concur with Bob.  A-M Systems would be the people to contact for servicing their amps. I'm not sure if it's different for equipment acquired through AD Instruments, but A-M Systems offers free lifetime support for amps purchased from them.

Best, Jeff


________________________________________________

Jeffrey L. Calton, Ph.D.

Department of Psychology

California State University, Sacramento

6000 J. Street

Sacramento, CA 95819-6007

916-278-5607

calton at csus.edu

________________________________
From: FUN_Mail <fun_mail-bounces at lists.funfaculty.org> on behalf of Bob Calin-Jageman <rcalinjageman at gmail.com>
Sent: Friday, March 21, 2025 3:18 PM
To: Faculty for Undergraduate Neuroscience Mailing List <fun_mail at lists.funfaculty.org>
Subject: Re: [FUN_Mail] AM3100 Intracellular amplifiers

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>
[https://ci3.googleusercontent.com/mail-sig/AIorK4zmdl8OFMHIfAxflzP3bH1rQmRAwC0UKHOuiVydnvVtdfCyTSEt3QDp9nk-MuXhyNV9X33MAJjBoDFH]


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