Readme.txt for 00RF09.ZIP

00RF09.ZIP contains files pertaining to "RF," by Zack Lau, 
W1VT (QEX, September/October 2000, pp 51-55). 

70cmqex.ckt
	Circuit-description file for modeling a 70-cm band-pass 
filter (BPF) in ARRL Radio Designer (ARD). ARD is a 
circuit-analysis application available for purchase from 
ARRL (http://www.arrl.org/ard/).

70cmqex.jpg
	A jpeg image of Fig 5. An ARD performance plot for the 
70-cm BPF. FILT is simulated, while RFILT is the measured 
filter response.

70cmqex.rp2
     An ARD report for the 70-cm BPF.

feedline.jpg
	A jpeg image of Fig 1. Response plots of the matching 
network designed by W1VD and K1TD with 566 (TRANS) and 370 
(TUNED) inches of 300-ohm twin lead.

nec20mdip.jpg
	A jpeg image of Fig 2. An EZNEC (with a NEC-4 
computation engine) plot of a dipole simulated at heights of 
25, 30, 35 and 40 feet, plotted in Amateur Radio Designer.

opt20mdip.jpg
	A jpeg image of Fig 3. Performance of the improved 
antenna and feed-line system. 

TwinLead.txt
	This text file containing the .ckt and other 
files used in ARD has been separated into individual files
that are more useful with ARL. Here are the associations 
of the various Figs, Tables and files:

Fig 1           54ft20m
Fig 2 & 3    20dip4x.ckt
Table 1       tvlead.ckt
Table 2       sc.ckt
Table 3       jjmatch.ckt


73, Bob, KU7G
3:07 PM Thursday, August 17, 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  

QST Team  *  Hints & Kinks Editor   *  QEX Managing Editor							

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