I suspect this is a stupid question but I am not finding a concise answer or I am not recognizing it when I see it. How important is it to fit the I.D. of snap-on RFI suppression ferrites to the size
Torid cores with multiple turn are more effective. K9YC has written a very good paper about this. It can be found on his website. The file is publications/rfi-ham. Chuck Gooden - K9LC I suspect th
Thanks Chuck. A couple of points of clarification. First, the link to the tutorial is k9yc.com/RFI-Ham.pdf Second, there's a much more recent piece on identifying, finding, and killing RF noise that
Just re-read your paper Jim, very useful, thanks again! Every time I re-read it, I get something new. 73s and thanks, Dave NK7Z http://www.nk7z.net k9yc.com/RFI-Ham.pdf Second, there's a much more re
I have re-read both RFI-Ham.pdf and KillingReceiveNoise.pdf twice each over the last couple of days. Great work which I refer to frequently, but neither really answers my question. Suppose I am tryin
I guess it would be too practical to take a VNA and measure Z with different IDs as you mention? N8DX _______________________________________________ RFI mailing list RFI@contesting.com http://lists.
Suppose I am trying to use common mode chokes to eliminate noise on a conductor at 144 MHz. Suppose the conductor diameter is 1/8 inch. This is VHF so we are not talking about multiple turns - just a
I scanned a few papers this morning that talk about things like the ferrite window fill factor and variations of inductance with wire size... then pulled out my vna and a ferrite to try a quick exper
Can you now do the same test, but see how the value changes with each turn in the core? IE: loop it through 1 time measure 2x etc. Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.c
Hi Joe. About a year ago I did just what you guys are talking about. I had purchased a whole bunch of assorted split bead cores of various sizes and shapes off Amazon. No specs with them but the pric
Thank you Dave! This seems to confirm my gut feeling. I suspect if the ferrite were almost solid with just a small hole through the center (just larger than the wire) Z (or more importantly equivalen
On 08/20/2017 10:34 PM, Jim Brown wrote: One turn will work fine. Although I haven't done any measurements to confirm it, I wouldn't worry about the loose fit. Check out this data sheet and note the