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[AMPS] Tuning roller inductor amps

To: <amps@contesting.com>
Subject: [AMPS] Tuning roller inductor amps
From: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com)
Date: Wed, 12 Dec 2001 19:31:41 EST
Jim, to insure you are using the proper amount of inductance for each band 
first make sure you know what is recommended via one of the Handbooks. If you 
have an inductance meter you can preset the amount of inductance required for 
each band and note the readings on a turns counter. Using a roller inductor 
without a turns counter is like walking in the dark. If you don't have access 
to an inductance meter you can calculate very closely the number of turns 
needed using several formulas based on the diameter in inches, length in 
inches, and number of turns-per-inch of the coil. But I would really 
recommend you get an inductance meter - it is a very useful piece of test 
equipment. If you are concerned about harmonic suppression use a Pi-L tank 
circuit within a properly shielded enclosure for better harmonic suppression. 
73 Todd Roberts WD4NGG.

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