🚀 go-pugleaf

In article <rich.726361718@pencil> rich@pencil.cs.missouri.edu 
(Rich Winkel) writes:
>Can anyone explain what a "Reike and Hartree diagram" is?

A Rieke diagram is sort of a fancy Smith chart for representing how the load
impedance and its point of connection to the magnetron can affect the power
output of the tube and its frequency.  Contours of frequency and power output
are plotted on an admittance circle diagram, a point on which respresents the
complex admittance of the load.  Sometimes an impedance circle is used in which
case a point represents the resistance and reactance of the load.  Another
form which typically uses a conventional polar representation for the complex
impedance (admittance) of the load is often called a load diagram.

A Hartree diagram shows the theoretical minimum anode voltage at which operation
is possible in the various modes of the magnetron.  Under operating conditions
the anode voltage must exceed the values given in the diagram.  The diagram
plots anode voltage on the vertical axis versus magnetic flux density on the
horizontal axis.

Another graph often found with magnetron design data is the performance chart
which plots a family of power outputs on a graph with anode voltage vs. anode
current.  Such a graph may contain additional lines of constant frequency or
constant efficiency.

Fortunately the designer of the magnetron has to worry the most about these
properties.  The designer of the oven has even less work with these things.
And the user of the oven just has to push the buttons - even my wife can
(usually) operate one!   ;-)
						Barry
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|  ___  ________  |    Dr. Barry L. Ornitz          WA4VZQ
| |  / /        | |    Eastman Chemical Company
| | / /         | |    ECC Research Laboratories, Engineering Research Div.
| |< < K O D A K| |    Process Instrumentation Research Laboratory
| | \ \         | |    P. O. Box 1972, Building 167B
| |__\ \________| |    Kingsport, TN  37662  (615/229-4904, FAX 615/229-4558)
|                 |    INTERNET:   ornitz@kodak.com
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{Don't even ask why someone at a chemical manufacturing company should know a
little about this subject!}     ;-)