Re: [Elecraft] OT: Protecting Toroidal Cores
Any choke I construct is in a box, with a 1/64th inch vent hole to keep from building a water pump out of my coax. 73s and thanks, Dave NK7Z https://www.nk7z.net On 05/02/2018 08:12 AM, N2TK, Tony wrote: I have had several FT-240 #31 cores crack with big chunks out of them or break in pieces. They were just lying on the ground with several turns of RG6 through them. They were in rain, snow and ice for a winter here in upstate NY. These were for receiving. I will be building new chokes and put them in a 4 x 4 plastic sealed box. 73, N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Charlie T Sent: Wednesday, May 02, 2018 7:36 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Protecting Toroidal Cores Yeas, but it's a destructive test, like checking the opening current for a fuse. I would guess that any core, whether ferrite or powdered iron would be subject to some water absorbs ion in not coated/painted. 73, Charlie k3ICH -Original Message- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of donov...@starpower.net Sent: Wednesday, May 02, 2018 12:56 AM To: j...@audiosystemsgroup.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Protecting Toroidal Cores I have not, but its easy to test! - Original Message - From: "Jim Brown" <j...@audiosystemsgroup.com> To: elecraft@mailman.qth.net Sent: Wednesday, May 2, 2018 4:44:44 AM Subject: Re: [Elecraft] OT: Protecting Toroidal Cores On 5/1/2018 9:30 PM, donov...@starpower.net wrote: Some mixes will absorb water then crack when frozen Hi Frank, Have you kept track of which mixes have that characteristic? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tony@verizon.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@nk7z.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
I have had several FT-240 #31 cores crack with big chunks out of them or break in pieces. They were just lying on the ground with several turns of RG6 through them. They were in rain, snow and ice for a winter here in upstate NY. These were for receiving. I will be building new chokes and put them in a 4 x 4 plastic sealed box. 73, N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Charlie T Sent: Wednesday, May 02, 2018 7:36 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Protecting Toroidal Cores Yeas, but it's a destructive test, like checking the opening current for a fuse. I would guess that any core, whether ferrite or powdered iron would be subject to some water absorbs ion in not coated/painted. 73, Charlie k3ICH -Original Message- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of donov...@starpower.net Sent: Wednesday, May 02, 2018 12:56 AM To: j...@audiosystemsgroup.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Protecting Toroidal Cores I have not, but its easy to test! - Original Message - From: "Jim Brown" <j...@audiosystemsgroup.com> To: elecraft@mailman.qth.net Sent: Wednesday, May 2, 2018 4:44:44 AM Subject: Re: [Elecraft] OT: Protecting Toroidal Cores On 5/1/2018 9:30 PM, donov...@starpower.net wrote: > Some mixes will absorb water then crack when frozen > Hi Frank, Have you kept track of which mixes have that characteristic? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tony@verizon.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
Would a simple dip in varnish do? David G3UNA > On 02 May 2018 at 12:35 Charlie T <pin...@erols.com> wrote: > > > Yeas, but it's a destructive test, like checking the opening current for a > fuse. > I would guess that any core, whether ferrite or powdered iron would be > subject to some water absorbs ion in not coated/painted. > > 73, Charlie k3ICH > > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On > Behalf Of donov...@starpower.net > Sent: Wednesday, May 02, 2018 12:56 AM > To: j...@audiosystemsgroup.com > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] OT: Protecting Toroidal Cores > > I have not, but its easy to test! > > - Original Message - > > From: "Jim Brown" <j...@audiosystemsgroup.com> > To: elecraft@mailman.qth.net > Sent: Wednesday, May 2, 2018 4:44:44 AM > Subject: Re: [Elecraft] OT: Protecting Toroidal Cores > > On 5/1/2018 9:30 PM, donov...@starpower.net wrote: > > Some mixes will absorb water then crack when frozen > > > Hi Frank, > > Have you kept track of which mixes have that characteristic? > > 73, Jim K9YC > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email list: > http://www.qsl.net/donate.html Message delivered to donov...@starpower.net > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to pin...@erols.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to d.cut...@ntlworld.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
Yeas, but it's a destructive test, like checking the opening current for a fuse. I would guess that any core, whether ferrite or powdered iron would be subject to some water absorbs ion in not coated/painted. 73, Charlie k3ICH -Original Message- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of donov...@starpower.net Sent: Wednesday, May 02, 2018 12:56 AM To: j...@audiosystemsgroup.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Protecting Toroidal Cores I have not, but its easy to test! - Original Message - From: "Jim Brown" <j...@audiosystemsgroup.com> To: elecraft@mailman.qth.net Sent: Wednesday, May 2, 2018 4:44:44 AM Subject: Re: [Elecraft] OT: Protecting Toroidal Cores On 5/1/2018 9:30 PM, donov...@starpower.net wrote: > Some mixes will absorb water then crack when frozen > Hi Frank, Have you kept track of which mixes have that characteristic? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
I have not, but its easy to test! - Original Message - From: "Jim Brown" <j...@audiosystemsgroup.com> To: elecraft@mailman.qth.net Sent: Wednesday, May 2, 2018 4:44:44 AM Subject: Re: [Elecraft] OT: Protecting Toroidal Cores On 5/1/2018 9:30 PM, donov...@starpower.net wrote: > Some mixes will absorb water then crack when frozen > Hi Frank, Have you kept track of which mixes have that characteristic? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
On 5/1/2018 9:30 PM, donov...@starpower.net wrote: Some mixes will absorb water then crack when frozen Hi Frank, Have you kept track of which mixes have that characteristic? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
There is no need to add additional protection for the K2 toroids. The enamel on the wire provides all the protection that is needed. Do NOT add any compound to the toroids. It may cause changes in the inductance and render your K2 non-functional. Besides, it will void the warranty. 73, Don W3FPR On 5/2/2018 12:00 AM, marvwhee...@nwlink.com wrote: Is it necessary to protect toroidal cores from the weather? They will be outside in a coastal environment. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Protecting Toroidal Cores
It depends... Some mixes will absorb water then crack when frozen You can test one of your toroids by soaking it in water for a day then freezing it 73 Frank W3LPL - Original Message - From: marvwhee...@nwlink.com To: elecraft@mailman.qth.net Sent: Wednesday, May 2, 2018 4:00:16 AM Subject: [Elecraft] OT: Protecting Toroidal Cores Is it necessary to protect toroidal cores from the weather? They will be outside in a coastal environment. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] OT: Protecting Toroidal Cores
Is it necessary to protect toroidal cores from the weather? They will be outside in a coastal environment. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
