L-57 Shielded Coil Forms

IRON POWDER SHIELDED COIL FORMS

Adjustable/Slug Tuned
L-57 Coil Forms

Part number	Frequency range (MHz)	AL (µh/100 t) at max Q	Color Code	Tuning Range
L-57-1	0.30 - 1.0	175	Blue	3/1
L-57-2	1.00 - 10.0	125	Red	2/1
L-57-3	0.01 - 0.5	204	Gray	3/1
L-57-6	10.00 - 50.0	115	Yellow	2/1
L-57-10	25.00 - 100.0	100	Black	2/1
L-57-17	50.00 - 150.0	67	Violet	1.5/1


	Available in materials 1, 2, 3, 6, 10 and 12 Can be tuned from both top and bottom Furnished with six-pin base to accommodate center tapped coils.

Solid magnet wire may be substituted for the Litz wire, but somewhat lower Q may result.

Most efficient when tuning slug is set at maximum L. For Tuning flexibility calculate so that slug will be about 90% maximum L when at operating frequency.

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