Readme.txt for NBPF.ZIP

NBPF.ZIP contains files pertaining to "Narrow Band-Pass 
Filters for HF," by William O. Sabin, W0IYH (QEX, 
September/October 2000, pp 13-17).

Fig1.jpg
     A color image of Fig 1 from the article. ARRL Amateur 
Radio Designer predicted response of symmetrical, low-side 
and high-side band-pass filters.

Nbpfdata.pdf
     An Adobe Acrobat file containing construction details, 
including simulated frequency responses of the filters. You 
need Adobe Acroreader to view the file. Acroreader is widely 
available on the Web.

Nbpfshnt.ckt
     Circuit-description file for modeling the shunt-coupled 
filters in ARRL Radio Designer (ARD). ARD is a 
circuit-analysis application available for purchase from 
ARRL (http://www.arrl.org/ard/).

Nbpftop.ckt
     ARD circuit-description file for top-coupled filters.

Nbpfshnt.rp2
     A shunt-coupled filter report file for ARD.

Nbpftop.rp2
     A top-coupled filter report file for ARD.

nbpshunt.MCD
     MathCAD data file to model shunt-coupled filters.

nbptop.MCD
     MathCAD data file to model top-coupled filters.


73, Bob, KU7G
11:30 AM 17 August 2000

Robert J. Schetgen, KU7G/1				
Senior Assistant Technical Editor			
American Radio Relay League, 225 Main St, Newington, CT 06111-1494
ph: 860-594-0277 (direct)					fax: 860-594-0259	
e-mail: rschetgen@arrl.org  

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