Alan,
You are correct, 100%!! If you want to dupe that kit, buy three
FT-240-31 cores, and wrap 12 turns of RG-400 around two core.
The cores are around 6 bucks each, and the RG-400 is around $1.25 a foot...
Put one core at the feedpoint of your antenna, one at the rig, (probably
won't need that one), and then take the third one and wrap 10 to 15
turns of your 12 volt power around it and put it close to the K4. That
will end most of the common mode issues...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 3/12/24 08:12, G4GNX wrote:
It’s a no-brainer. That ad is for an RFI kit only. My question is: Are 3
toroids and some bits of wire worth $150?
Unless I was severely disabled, blind or exceptionally lazy, I’d be ashamed to
buy that item!
73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700
73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700
On 12 Mar 2024, at 13:42, Kurt Pawlikowski <ku...@pinrod.com> wrote:
Petr,
Looking at the only listing for anything "K4," I found this
<https://www.ebay.com/itm/204318009997?itmmeta=01HRSE265CV1YJX0XQ8K8HAGRW&hash=item2f924d6a8d:g:bzEAAOSwiatkSVBn&itmprp=enc%3AAQAIAAAA0JHSyyPQ1ljDZDKiIlX2UrjAtz%2BoiTfl74GzI6wJx0HUam1ARJ9Bwh9q7x0TfNhQeA1rBlInkrAPU6E2bEy5%2BSblGHLv6flCWtN5k5hLWLjCkWWLRQHSJxN9SxPqwibj0a1qfu%2FDhguwza7YsjNhNg%2Bkwb077Dm%2BxB1bw0i0Yg07EneSyp3Ea5R8f%2FLltGGy0yxXcOP%2Bk5mL8MIlC3Y%2BhHUgH3mpQHc%2Fno6vxRgxpc5WCBkMrdBmxZnke5pMRsQjfYfnjJzJcjKM9PR11H4uavs%3D%7Ctkp%3ABk9SR-jiiK7GYw>.
If that's what you're looking at, it's an "RFI Kit" for a K4, I don't think it includes the K4 itself!
{'-)
kurtt WB9FMC
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