>From: Gil Cross >Sender: [email protected] >To: [email protected] >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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
