J W Miller coil forms

[Gil Cross]

        Hi all. Looking for info as to the diameters or any where this info could be found of the following:
        4500-2
        4500-4
        4405
        4403
        Have looked on the inter net but maybe just not in right places.

        Thank you

                                         Gil Cross
                                                         K8EAG
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[C. J. Hawley]

>From: Gil Cross
>Sender: [hidden email]
>To: [hidden email]
>Subject: [Elecraft] J W Miller coil forms
>Sent: Nov 5, 2009 7:05 PM
>
>        Hi all. Looking for info as to the diameters or any where this info could be found of the following:
>        4500-2
>        4500-4
>        4405
>        4403
>        Have looked on the inter net but maybe just not in right?>       places.

Hi, I'm trying again if my first post didn't go thru...found more info...

4500 coils are 1/4" dia and 7/8" long.
4400 coils are 3/8" dia and 1 1/16" long

4500-2 is recommended freq 1-20 MHz and red core.

4500-4 is recommended freq 50-200MHz and white core.

but 4405 is 3.3uH to 6.5uH inductance, 0.17 ohms, max current 636 ma, 18 1/4 turns. Ceramic form. Powdered iron core.

and 4403 is 0.99uH to 1.5uH inductance, 0.04 ohms, max current 1600 ma, 9 1/4 turns. Ceramic form.

Chuck Hawley, KE9UW
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