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Thank you for the information. There is a lack of any information in this area on the internet....at least as far as my searches go. I guess we have all been spoiled by the availability of a wide variety of sophisticated test and measuring equipment. It is amazing what Tesla, Edison and others accomplished with just a few rudimentary tools. Makes you wonder if they had a better fundamental understanding of the underlying principles since they had to deduce the results. Paul --Previous Message--
: --Previous Message--
: I am looking for descriptions of the types of test equipment Tesla may
: have
: used. Voltage and current measuring devices are straight forward.
: However, how did he measure inductance, capacitance, field strength,
: phase, frequency, etc? Thanks for your help.
:
:
: Hi Paul,
:
: That's quite and interesting question!
:
: Although Tesla's notes and patents provide fairly good descriptions of the
: equipment he designed and used during various experiments, there is a
: distinct lack of specific information about the measuring equipment that
: he may have actually used in his lab. However, we can make some
: "educated guesses".
:
: Frequency and phase relationships (at least from from electromechanical
: equipment) can be determined given a knowledge of armature and stator pole
: geometries and the rotational speed. Inductance and capacitance can be
: measured using an AC source to drive an AC bridge in conjunction with
: laboratory standard L and C references. AC bridges were well understood
: and were in common use during the late 1800's. Once L and C were measured,
: frequency of spark gap LC circuits could then be estimated. I am not aware
: of any direct phase or field strength measurements made by Tesla.
:
: Some of the history of equipment and techniques for measuring L and C via
: AC bridges (at low and acoustic frequencies) are discussed in the book,
: "Alternating Current Bridge Methods: For the Measurement of
: Inductance, Capacitance, and Effective Resistance at Low and Acoustic
: Frequencies", by B. Hague, Isaac Pitman and Sons, (many editions
: available).
:
: Just imagine how useful an oscilloscope would have been to Tesla... :^)
:
: Bert
:
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