Date: Mon Oct 20 11:05:35 2008
Author: Megan Yasuda
Subject: Re: Electronics Schematic
Thanks, Gary. However, this is not the problem. The filter capacitors
seem to be in decent shape.
Gary Karshner wrote:
> Check the filter capacitors. They are one of the most common
> failures in power supplies and typically sort out that would explain
> your high current although the ammeter is typically in the circuit
> before the ammeter not after.
> At 08:22 AM 10/20/2008 -0500, you wrote:
>> The power supply is rated at 55V at 38 amps.
>> When everything is turned down to zero, and a load is applied to the
>> magnet, the meters we put on it are reading max amps.
>> We can't figure out how we can read max amps when everything is set
>> to zero.
>> Any help would be appreciated. Eventually our electronics guy will
>> just start pulling parts and hope he gets lucky.
>> Chuck Patten wrote:
>>> Any idea what the specifications are? I think that Alpha Scientific
>>> making power supplies in the late 1980's. How is it malfunctioning
>>> -----Original Message-----
>>> From: email@example.com [mailto:firstname.lastname@example.org] On
>>> Behalf Of Megan Yasuda
>>> Sent: Friday, October 17, 2008 8:02 AM
>>> To: email@example.com
>>> Subject: [tap-l] Electronics Schematic
>>> Last week, we attempted to start up our old Hall Effect experiment
>>> which has
>>> been dormant for years. We discovered that the power supply is no
>>> functioning properly.
>>> I cannot find any paperwork on it and am looking for a schematic. Does
>>> anyone have it?
>>> The information on the power supply is:
>>> Alpha Scientific Inc.
>>> model #45-30
>>> serial # 4244
>>> We believe the power supply is over 40 years old.
>> Megan Yasuda
>> Physics Lab Technician/Radiation Safety Officer
>> University of Northern Iowa
>> Department of Physics
>> (319) 273 6234
Physics Lab Technician/Radiation Safety Officer
University of Northern Iowa
Department of Physics
(319) 273 6234