FW: NEC-LIST: Coil-loading.

-----Original Message-----
From: Lau, Zack, W1VT
Sent: Tuesday, February 08, 2005 9:22 AM
To: 'nec-list_at_robomod.net'
Subject: NEC-LIST: Coil-loading.

Hi James,

  I published a design using coils with a measured Q of 720
in the November 1998 QEX "A Narrow Bandwidth 40 Meter Bandpass
Filter." I measured the coils with a Q meter and then proceeded
to build a 29 kHz wide filter with a center frequency of 7035 MHz.

I used software by Brian Beezley K6STI to design the coil, but
he is out of business.It is quite likely that his DOS software
has not been upgraded to the Windows environment, so it is of
limited commercial value.

Apr 1992 QST 76 Accurate Single-Layer-Solenoid Inductance
Calculations (Technical Correspondence)
Keywords: THEORY ANALYSIS INDUCTANCE Meyer, Hank, W6GGV

Jul 1992 QST 73 Accurate Single-Layer Solenoid Inductance
Calculations (April 1992, p. 76)
(Feedback)
Keywords: THEORY ANALYSIS INDUCTANCE

However, you could write new software based on the
equations presented in QST. His software merely analyzed
coils--it had no optimization routines.

73--Zack Lau W1VT
ARRL Senior Lab Engineer

Brian's current address according to FCC records:
BEEZLEY, BRIAN W, K6STI (Extra)
3532 LINDA VISTA DR
SAN MARCOS, CA 92069

ARRLWeb: Getting Copies of Articles
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for $3 ($5 for nonmembers) for each article requested. Contact
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if you wish to get photocopies.

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