The files in this package are:

	XTALF.WK1	(Lotus 1-2-3 spreadsheet)
	XTALF.FMT	(spreadsheet formatting info)
	XTALF.TXT	(this file)

Author: Dan Halbert, KB1RT (good in the Callbook).

This package is a Butterworth and Chebyshev crystal ladder filter
calculator, done as a Lotus 1-2-3 spreadsheet. This spreadsheet
was created on Lotus 1-2-3 Release 4. I have designed it to print
on one page when formatted with the given formatting information.

See May 1982 QST, "A unified approach to the design of crystal ladder
filters", by Wes Hayward, W7ZOI, p. 21. See also January 1990 QST, "A
tester for crystal F, Q, and R", p. 21, by Doug DeMaw, W1FB, which
describes a simple test instrument for making the measurements
described in the W7ZOI article. Both these articles are reprinted in
the ARRL book "W1FB's Design Notebook", by Doug DeMaw.

The spreadsheet is initially loaded with data from the example in that
article. The May 1982 QST article has one typo in it, for Butterworth
N=4, k_23.

Copyright (c) 1993 Daniel C. Halbert. Permission to reproduce granted 
provided this copyright notice is reproduced in full.







