[Elecraft] J W Miller coil forms

[C. J. Hawley]

>From: Gil Cross 
>Sender: elecraft-bounces at mailman.qth.net 
>To: elecraft at mailman.qth.net 
>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