PSN-L Email List Message
Subject: Resistive Damping
From: "Benji Johnson" Benji.Johnson@..................
Date: Wed, 23 Aug 2006 13:30:05 -0700
I would like to update my Lehman style seismometer from that of using oil =
damping to using resistive damping. I have read Sean-Thomas' very =
informative post (http://www.seismicnet.com/psnlist/991109_101841_1.html), =
but being a rank novice in such matters, I still have a few questions.
The coil that I am using is wound with #34 wire, and has a resistance of =
2,330 ohms. The leads from the coil currently terminate in an RCA jack.
My tentative plan is to: 1) Short the leads, to determine if resistive =
damping will be feasible. 2) Begin with approximately 3,000 ohms of =
resistance and begin a trial & error period to determine the appropriate =
amount of resistance.
The questions that I have before starting in on this are:
1) Is there a technique to cutting through the insulation to get to the =
wires? I get nervous thinking about working with the fine #34 wire, and =
having to rewire the RCA jack due to a careless mistake. Is it just a =
matter of careful scraping to get to the wire?
2) Once down to the wire, what is the best way to go about connecting the =
resistors to the leads? With alligator clips, which would make it easily =
3) I know that the resistors need to be wired in parallel, but what is =
the best way to connect the resistors to each other? Twist together, =
solder, or use a solderless breadboard mounted between the leads?
Thanks in advance.
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