Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Re\:\s+compact\s+coils\.\.\.\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Re\:\s+compact\s+coils\.\.\.\s*$/: 11 ]

Total 11 documents matching your query.

1. [Amps] Re: compact coils... (score: 1): Author: "Roy Koeppe" <royanjoy@ncn.net>; Date: Tue, 15 Feb 2005 07:14:44 -0600; Marv talked about: "The 160 meter portion, even employing a reduced diameter conductor, requires almost half the total space in a Pi-Coil. Has anyone ever seen a multilayer approach to this portion o; /archives//html/Amps/2005-02/msg00527.html (7,515 bytes)
2. Re: [Amps] Re: compact coils... (score: 1): Author: "DF3KV" <df3kv@aol.com>; Date: Tue, 15 Feb 2005 15:23:19 +0100; conductor, 2.5" the the form, output if one approach reducing coil length could be this: http://www.pbase.com/df3kv/image/34219012/large 73 Peter _______________________________________________ Amps; /archives//html/Amps/2005-02/msg00529.html (7,733 bytes)
3. Re: [Amps] Re: compact coils... (score: 1): Author: Japerlick@aol.com; Date: Tue, 15 Feb 2005 13:41:40 EST; ......."Has anyone ever seen a multilayer approach to this portion of the coil?? For instance 3 layers spaced 1/4" apart radially...." There are two problems with the multilayer winding approach. Fir; /archives//html/Amps/2005-02/msg00530.html (7,708 bytes)
4. Re: [Amps] Re: compact coils... (score: 1): Author: Mike Manship <mjmanship@iquest.net>; Date: Tue, 15 Feb 2005 13:46:50 -0500; I remember an amp project in the ARRL handbook years ago which used several pieces of ferrite rod taped together and placed inside of one end of the tank coil to provide enough inductance for 80 met; /archives//html/Amps/2005-02/msg00531.html (7,003 bytes)
5. Re: [Amps] Re: compact coils... (score: 1): Author: "DF3KV" <df3kv@aol.com>; Date: Tue, 15 Feb 2005 19:55:00 +0100; I remember an amp project in the ARRL handbook years ago which used several pieces of ferrite rod taped together and placed inside of one end of the tank coil to provide enough inductance for 80 mete; /archives//html/Amps/2005-02/msg00532.html (7,382 bytes)
6. Re: [Amps] Re: compact coils... (score: 1): Author: ToddRoberts2001@aol.com; Date: Tue, 15 Feb 2005 14:58:16 EST; I tried that with my L4B for 160m, it worked, but the rods got very hot 73 Peter It has been my experience that ferrites and iron core cores tend to saturate and cause problems and heating in High-Z; /archives//html/Amps/2005-02/msg00533.html (8,056 bytes)
7. Re: [Amps] Re: compact coils... (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 15 Feb 2005 12:09:15 -0800; On Feb 15, 2005, at 11:58 AM, ToddRoberts2001@aol.com wrote: In a message dated 2/15/2005 2:00:42 PM Eastern Standard Time, df3kv@aol.com writes: I remember an amp project in the ARRL handbook years; /archives//html/Amps/2005-02/msg00534.html (8,835 bytes)
8. Re: [Amps] Re: compact coils... (score: 1): Author: ToddRoberts2001@aol.com; Date: Tue, 15 Feb 2005 20:16:13 EST; In a message dated 2/15/2005 5:17:34 PM Eastern Standard Time, N7HIY@comcast.net writes: The skin effect on 160m is almost nonexistent. RF current flow at 1.8 MHz is evenly distributed across the cro; /archives//html/Amps/2005-02/msg00537.html (7,739 bytes)
9. Re: [Amps] Re: compact coils... (score: 1): Author: G3rzp@aol.com; Date: Wed, 16 Feb 2005 06:55:04 EST; The British Army D11 and D13 transmitters (which was also a Naval transmitter called the NT201, but in another colour scheme) used ferrite loading of the tank coil. That coil wound silver plated phos; /archives//html/Amps/2005-02/msg00547.html (8,000 bytes)
10. Re: [Amps] Re: compact coils... (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 16 Feb 2005 04:19:10 -0800; On Feb 16, 2005, at 3:55 AM, G3rzp@aol.com wrote: The British Army D11 and D13 transmitters (which was also a Naval transmitter called the NT201, but in another colour scheme) used ferrite loading of; /archives//html/Amps/2005-02/msg00548.html (9,250 bytes)
11. Re: [Amps] Re: compact coils... (score: 1): Author: G3rzp@aol.com; Date: Wed, 16 Feb 2005 07:24:11 EST; Are you certain that the core material was not powdered iron? Yup. I was surprised, but it's Neosid F14 material, suitable for tuned circuits up to about 4 or 5MHz. The loading was cylinders about 1.; /archives//html/Amps/2005-02/msg00549.html (7,965 bytes)

Current List: 1 - 11
Page: [1]