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L7 Filliment Choke Core.

Roger KW4EMF All Messages By This Member #82196 On my L7 I noticed that the filliment choke had a slight bow in it. After further investigation I found that the core inside broken in two almost in the center. I think it's RFC2 on the schematic. It's right beside the Filliment transformer. Is this a bad thing? Do I need to replace the core? I don't know what to replace it with. Thanks Roger KW4EMF
Evan All Messages By This Member #82202 Yes, it is a bad thing and knowing whether it was mechanical shock or "heat" that caused the failure will guide you toward a complete remedy. ?Let's hear what the experts have to say. On Friday, January 24, 2025 at 12:03:20 AM EST, Roger KW4EMF <rogerlhill@...> wrote: On my L7 I noticed that the filliment choke had a slight bow in it. After further investigation I found that the core inside broken in two almost in the center. I think it's RFC2 on the schematic. It's right beside the Filliment transformer. Is this a bad thing? Do I need to replace the core? I don't know what to replace it with. Thanks Roger KW4EMF
Clint VE3CMQ All Messages By This Member #82204 开云体育 It is possible to crazy glue the core back together and it will function properly.? It’s been done hundreds of times.? Ferrite glues well. ? 73, Clint, VE3CMQ ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Evan via groups.io Sent: Friday, 24 January 2025 07:50 To: [email protected] Subject: Re: [DRAKE-RADIO] L7 Filliment Choke Core. ? Yes, it is a bad thing and knowing whether it was mechanical shock or "heat" that caused the failure will guide you toward a complete remedy. ?Let's hear what the experts have to say. ? On Friday, January 24, 2025 at 12:03:20 AM EST, Roger KW4EMF <rogerlhill@...> wrote: ? ? On my L7 I noticed that the filliment choke had a slight bow in it. After further investigation I found that the core inside broken in two almost in the center. I think it's RFC2 on the schematic. It's right beside the Filliment transformer. Is this a bad thing? Do I need to replace the core? I don't know what to replace it with. Thanks Roger KW4EMF
jerry-KF6VB All Messages By This Member #82210 Ditto the recommendation for cyanoacrylate cement. I've used it on toroids that I wanted to get around a piece of coax without removing the connector. - Jerry, KF6VB toggle quoted message Show quoted text On 2025-01-24 06:35, Clint VE3CMQ wrote: It is possible to crazy glue the core back together and it will function properly. It’s been done hundreds of times. Ferrite glues well. 73, Clint, VE3CMQ FROM: [email protected] <[email protected]> ON BEHALF OF Evan via groups.io SENT: Friday, 24 January 2025 07:50 TO: [email protected] SUBJECT: Re: [DRAKE-RADIO] L7 Filliment Choke Core. Yes, it is a bad thing and knowing whether it was mechanical shock or "heat" that caused the failure will guide you toward a complete remedy. Let's hear what the experts have to say. On Friday, January 24, 2025 at 12:03:20 AM EST, Roger KW4EMF <rogerlhill@...> wrote: On my L7 I noticed that the filliment choke had a slight bow in it. After further investigation I found that the core inside broken in two almost in the center. I think it's RFC2 on the schematic. It's right beside the Filliment transformer. Is this a bad thing? Do I need to replace the core? I don't know what to replace it with. Thanks Roger KW4EMF Links: ------ [1] /g/DRAKE-RADIO/message/82204 [2] /mt/110785822/243852 [3] /g/DRAKE-RADIO/post [4] /g/DRAKE-RADIO/editsub/243852 [5] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
Roger KW4EMF All Messages By This Member #82223 I don't know why I didn't think about gluing back together. Lord knows I've glued a bunch of toroids when making end fed half wave antennas.
Jim VE7RF All Messages By This Member #82224 It would still work even if you didn't glue it back together.? ?There is no electrical continuity to begin with.?

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